A THz radiation driven IFEL as a phaselocked prebuncher for a Plasma Beat-Wave Accelerator
|
|
- Stuart Clinton Melton
- 5 years ago
- Views:
Transcription
1 A THz radiation driven IFEL as a phaselocked prebuncher for a Plasma Beat-Wave Accelerator P. Musumeci 1, S. Ya. Tochitsky, C. E. Clayton, C. Joshi, C. Pellegrini 1, J.B. Rosenzweig 1 1 Department of Physics, Department of Electrical Engineering, University of California at Los Angeles, 45 Hilgard avenue, Los Angeles, CA 995 Abstract To obtain a high quality electron beam with small energy spread in the laser driven plasma accelerator, the electrons have to be prebunched at the scale of the plasma wavelength. We study the feasibility of an experiment where an inverse free electron laser (IFEL) is used to bunch the electron beam before the injection into a plasma beatwave accelerator. It is suggested to drive the IFEL prebuncher by a THz seed radiation phase-locked to the electromagnetic beatwave through difference frequency generation process in a nonlinear crystal. Design and numerical simulations for this experiment are presented. 1. Introduction In recent years advanced high gradient accelerator experiments have taken place successfully. Proof-of-principle demonstrations using laser or electron driven plasma waves and non-plasma based structures have shown gradients much higher than conventional accelerators [1]. The focus of the current research in this field is now shifting from increasing the energy gain in short distances to delivering high quality electron beams that could be used for different applications. One of the main characteristics of any usable electron beam is the energy spread. So far all schemes for high gradient acceleration have shown 1 % energy spread. This is physically due to the experimental difficulties related to the generation and the injection of an electron beam in the high gradient accelerating field wave with a typical period of 1-3 µm. It is obvious that if the injected electron beam samples all the phases of the accelerating field, the energy spectrum at the output will be continuous. The goal of future experiments is to reduce the energy spread by reducing in some way the electron bunch length, either at the stage of electron generation, or by compressing the bunch length and synchronizing the electrons to the accelerating structure. Injection of prebunched electrons that are synchronized to the high gradient electric field wave is commonly called phase locking. The experimental challenges in acceleration of phase-locked electrons have been individuated and studied []. Recently some positive experimental results in this field have been reported. At Brookhaven National Lab, by use of the Inverse Free Electron Laser (IFEL) interaction microbunching of the electron beam on the optical scale has been demonstrated [3]. Later, in the frame of STELLA collaboration, the timed injection of these microbunches in an IFEL accelerator has been successfully realized [4]. At the Neptune Laboratory at UCLA, there is an ongoing experiment on Plasma Beat Wave Accelerator (PBWA) of electrons [1]. The experiment uses two lines of a CO laser (1.6 and 1.3 µm) to excite a relativistic plasma beat wave with acceleration gradient ~3 GeV/m. The plasma wavelength is 34 µm, requiring a bunch length of about 5-6 µm. In phase I of the experiment, currently underway, a long (>34 µm) electron bunch will be injected in the plasma structure and accelerated up to 1 MeV. Then in phase II, prebunched phase-locked electrons will be injected to achieve small energy spread. Several methods for phase-locked injection have been considered including FIR driven IFEL []. It was recognized that the main drawback of such a scheme is the need of a high-power (>1 MW) seed radiation at the wavelength of 34 µm. All feasible solutions of this issue were based on an FEL source that seriously complicates the experiment. For example, a classical FEL oscillator-amplifier scheme was suggested by Lampel et al for a 1 µm driven PBWA [5]. In this paper we address the challenge of generating such micro-bunches with characteristic length shorter than the plasma beat wavelength, phase locked with the accelerating structure. It is suggested to use the IFEL interaction between the relativistic electrons from the Neptune photoinjector and a high power electromagnetic beat-wave. We propose to generate 1 MW of 1 THz radiation by difference frequency generation (DFG) in a nonlinear crystal, mixing the two CO lines. Co-propagating the radiation with the
2 electron beam inside a short undulator achieves the bunching at the required wavelength. Moreover, because the electromagnetic radiation is generated from the same laser that excites the relativistic plasma wave, phase-locking is achieved. In the first part of the paper we illustrate the scheme, then after a study of the microbunching dynamics we present the simulation results and discuss the optimization of the experiment. In the last section we focus on possible design of GaAs nonlinear mixer for generating the required power of THz electromagnetic wave.. Inverse Free Electron Laser interaction as an efficient prebuncher at Neptune Laboratory The Neptune Laboratory at UCLA is an advanced accelerator laboratory dedicated to the study of laser plasma acceleration and high brightness electron beam. There are two main components at the laboratory: the most powerful in the world, TW-class CO laser system and a state-of-the-art photoinjector. A two wavelength 1 TW CO laser is used to drive the plasma beat-wave structure. A standard master oscillatorpower amplifier approach is used to amplify 1 ps pulses up to 1 J as presented elsewhere [6]. The electron source for the Neptune Linac is a 1.6 cell S-band RF gun driven by 66 nm photocathode laser followed by a plane-wave transformer (PWT) linac section. The electrons are accelerated inside the PWT up to 1 MeV with a small energy spread (.5%). An emittance compensation solenoid and quadrupoles for transporting and focusing the electrons are important components of the system. Small transverse emittance (6 mm-mrad) and 1 µm rms spot sizes at the interaction point are obtained. There is also a magnetic chicane for manipulations on the electron longitudinal phase space [7]. In Fig.1 we show proposed solution for the PBWA phase II experiment on injecting an electron beam prebunched on the scale of the plasma wavelength and phase locked with the accelerating structure. As shown in the picture, using a salt (NaCl) beamsplitter, a small fraction (~4 %) of the high power CO laser is split and then sent into a non-linear crystal. Here, by difference frequency mixing, as discussed in the last section of this paper, we should generate up to 1 MW of 1 THz radiation. This 34 µm wave originates from the mixing of the same two wavelengths that drive the plasma beat wave, so that it has a well-defined phase relationship with the accelerating structure. Absolute phase can then be adjusted using a delay line. The THz beam is made collinear with the electron beam and is sent through a planar undulator using a mirror with a hole. This off-axis parabolic mirror has also the function of focusing the radiation to a spot size of 7 mm located at the end of a.5 m long undulator. The electron beam coming from the linac is microbunched on the scale of 34 µm by the IFEL interaction going through the undulator magnetic field, then it is focused with the final focus triplet at the interaction point (IP) and finally it is accelerated by the relativistc plasma beatwave excited by the main fraction of the TW CO laser beam. The distance between the end of the undulator and the IP is less than 1 m. Note that for the 1 µm STELLA experiment where tolerances are tighter because of the shorter wavelength, the IFEL accelerator was located.3 m downstream of the IFEL prebuncher [4]. Fig.1: Experimental layout for THZ Inverse Free Electron Laser microbunching.
3 3. IFEL Bunching dynamics and simulation results In an IFEL [8], relativistic particles are moving through an undulator magnet; an electromagnetic wave is propagating parallel to the beam. The undulator magnet produces a non zero transverse velocity (wiggling motion) in a direction parallel to the electric vector of the wave, so that energy can be transferred between the particle and the wave. The Inverse Free Electron Laser dynamics is usually described in terms of the energy of the electron (γ) and the phase of the coupling between the wiggling motion and the electromagnetic wave (ψ). The equations of the motion for a single electron moving in a plane linearly polarized electromagnetic wave in a planar undulator magnetic field, are: γ = z ee mc JJ ( K) K sin( ψ ) ψ = k z w + k K K + l k + KK l γ JJ ( K) cos( ψ ) where k w is the undulator wave number, K is the undulator dimensionless parameter (eb/ mck w ), K l is the radiation dimensionless parameter (ee /mck) and JJ is the Bessel factor due to the planar geometry. The IFEL acts as a longitudinal lens and microbunches the electrons on the scale of the electromagnetic wavelength. 1/ bunch length (fraction of wavelength) Full IFEL equations Harmonic oscillator approximation Distance (normalized units) Fig.: Rms microbunch length as a function of normalized distance for a harmonic oscillator and an IFEL. To understand a fundamental limitation of an IFEL-microbuncher it is instructive to study the difference between the IFEL longitudinal lens compression and an ideal case of a harmonic oscillator type of interaction (Fig.). In the ideal case, the electron density evolves under linear transformation and the minimum bunch length is obtained after 1/4 of the synchrotron period with a final bunch length that depends only upon the initial energy spread. In the IFEL case, the equations are not linear and the corrections to the linear motion (expansion of the sine term in the equation for γ) are important. The IFEL reaches optimum bunching 5% later than the harmonic oscillator (at 3/8 of the calculated synchrotron period) and the minimum microbunch length is set now by the aberrations, or non-linearities of the potential (Fig.). They cause an effective emittance growth, or diluition in the longitudinal phase space. This is the limit of the IFEL as a longitudinal lens. Nevertheless, bunch lengths on the order of 1/1 the wavelength can easily be obtained, and that is well within the goals for the Phase II of PBWA. At the Neptune Laboratory, in order to achieve efficient microbunching in the small experimental area available, we need to optimize parameters of the THz IFEL. We considered here a planar permanent magnet undulator. The requirement that the undulator should geometrically match the THz beam propagating in free space with the electron beam limits the minimum gap or the maximum achievable
4 magnetic field. The undulator length sets the duration of the IFEL interaction. Obviously the choice of the undulator length depends strongly on the available electromagnetic power. For 1 MW of THz radiation and a magnetic field of.6 T, we achieve maximum bunching through the Inverse Free Electron Laser interaction after ~.5m. As it is shown in the Fig.3, having more electromagnetic power or a longer undulator doesn t significantly increase the performance of the system. The IFEL buncher efficiency reaches the limit mentioned above, considering the effects of the non-linearities and the longitudinal emittance dilution. Microbunch length (µ) FIR radiation power (MW ) Undulator length (m ) 1. Fig.3: Electron microbunch length versus electromagnetic power and undulator length. We note that the undulator requirements to get optimum bunching having 1 MW of FIR radiation available to drive the IFEL are not very demanding from the magnet construction point of view (Table1). A planar permanent magnet undulator with the Halbach scheme will easily produce these characteristics. Table 1: Undulator parameters Magnetic field.6 T Undulator wavelength 6 cm Magnet gap cm K parameter 3.1 Undulator length.54 m Our preliminary calculations are well confirmed by full 3D simulations. The results are shown in Fig. 4. The simulations are performed using TREDI [9], a 3d Lienerd-Wiechert based, 4 th order Runge Kutta, Lorentz solver code to track the electrons through the undulator magnetic field and the laser field. The input electron beam has the parameters typically running at Neptune laboratory, 4 ps (rms) long, emittance 6 mm-mrad, charge 3 pc. The radiation is assumed to be a 1 MW THz wave, focused in vacuum to 7 mm focal spot. Fig.4 shows a snapshot of the electron longitudinal phase space at the end of the undulator. The longitudinal microbunching on the scale of the plasma wavelength is evident within the 4 ps (rms) long beam envelope. Fig.4b presents the phase histogram over the 34 µm wavelength. The microbunches have a width of ~3 µm - much smaller than the plasma wavelength - which should allow us to load electrons into the best accelerating fields, giving a relatively monochromatic output spectrum. Obviously because the
5 .1 Bunching in IFEL. Histogram of phase distribution.5 deltap/p % z (m) Fig. 4: Simulation results for THz IFEL microbunching phase THz IFEL driving radiation is locked in phase with the plasma beatwave, all these microbunches are phaselocked with the accelerating structure. We also analyzed the relevance of diffraction, spectral bandwidth and space charge, that are usually not included in the simple analytic treatment of the IFEL interaction, but that are potentially critical for the IFEL interaction. It is important to take into account effect of the diffraction of the long wavelength (34 µm) electromagnetic radiation. Including diffraction effects in the analysis is necessary any time the radiation Raleigh range is shorter than the undulator length [1]. Slow variation of electric field amplitude and phase along the undulator effectively change the resonant condition along the undulator. With a 7 mm spot size, the Raleigh range for THz radiation is 5 cm, so that in our case this effect is not very important. If less FIR power is available, a guiding system rather than tighter focusing should be implemented to avoid this diffraction effect. As was reported by Corkum et al. [11], significant broadening of the 1 µm radiation in the bulk of nonlinear material could be observed due to high non-linearity. This, of course, could result in broader than Fourier transformed limited bandwidth of THz radiation. We simulated the effects of spectral sidebands to the bunching process. As it is shown in Fig.5a, the bunching efficiency starts to decrease when the spectrum becomes larger than 1 GHz FWHM. This frequency interval is more than 1 times greater than the Fourier limited spectral width for 1 ps pulses. Estimations have shown that at pump intensity ~3 GW/cm one should not expect spectral broadening above 5 GHz. More detailed study of this issue is required. Another question is what happens when we increase the number of electrons in the microbunches. The longitudinal space charge fields counters the IFEL bunching force, so that the IFEL interaction has to stay on for a longer period of time to get to the optimum bunching point. No significant effect is seen for charge up to 3 pc (Fig.5b) Relative undulator length Spectral width (GHz) Relative undulator length Charge (pc) Fig. 5: Undulator length for the optimum bunching as a function of (a) the spectral width of radiation and (b) the electron beam charge. Optimization of the system in our case means getting more electrons with a smaller phase spread in order to have better energy spread after acceleration in the PBWA. Further improvement in this respect (excluding
6 adiabatic capture or undulator tapering from the consideration) is possible with additional modulation of the e-beam injected in the IFEL structure. Here we briefly consider several options. One approach is to have pre-bunched electrons generated at the cathode with a modulated UV laser as described in []. Another possibility is to utilize the Neptune magnetic chicane in order to pre-compress the electron beam. In this case the problem of the jitter of the RF clock with respect to the laser beatwave clock has to be addressed. The results of the simulations for these options are shown in Fig.6. 1 Histogram of phase distribution.4 Histogram of phase distribution %.5 % phase phase Fig. 6: Phase distribution for: a) electrons prebunched at the photocathode through UV driving laser modulation. b) electron beam precompressed in the magnetic chicane. 4. THZ radiation source The key element of a laser-driven IFEL prebuncher is a high-power source of optical radiation. We propose to use difference frequency mixing process in a nonlinear crystal to produce high-power driving THz radiation (>1 MW) for the IFEL buncher. It is known that low DFG efficiency is a serious problem for the FIR spectral range. The highest FIR power generated by now using this method is a few kw [1]. At the same time 1 ps, two-wavelength CO laser pulses from the Neptune Lab system are naturally very well suited for producing high-power FIR radiation. Nonlinear frequency conversion efficiency increases significantly for short pulses: first owing to the power increase and second, this power can be coupled into a crystal because of the higher surface damage threshold for shorter pulses. Three methods to generate high-power 34 µm radiation by CO laser difference frequency mixing in a nonlinear crystal have been considered. They are: standard birefringent phase matching, quasi-phase matching with periodic structures, and noncollinear phase matching in isotropic materials. FIR generation by difference frequency mixing is possible in the birefringent materials ZnGeP, AgGaSe and Te, which are transparent for both MIR (1 µm) and FIR (34 µm) radiation. Collinear phase-matched DFG has been reported in ZnGeP [13,14]. Our calculations have shown that up to 39 MW/cm can be generated in FIR with a 1 cm long crystal at 5 GW of incident power. However, serious difficulties are encountered in growing large-aperture ZnGeP crystals that makes achieving a 1 MW power level at 34 µm very challenging. Another problem is that this material requires Type II interaction for DFG. The later hinders it s application for a high-power, two-wavelength CO laser system. There are some cubic nonlinear semiconductors such as InSb, GaAs, etc., which can be used for FIR DFG with CO lasers. But these crystals being cubic lack birefringence. Therefore other methods for phasematching in isotropic crystals must be considered. Even in isotropic crystals waves are propagating in phase over the coherence length (L c ), the distance over which the relative phase changes by π. For FIR difference frequency mixing the coherence length is relatively long. For example, L c is 7 µm in the case of GaAs. This allows for the generation of FIR radiation in thin InSb [15] and GaAs [16] slabs. However, the DFG efficiency is very low because of the short L c. Quasi-phase matching is a technique for phase matching nonlinear optical interactions in which the relative phase is corrected at regular intervals using a stack of plates or periodically grown structure. This technique progressed significantly during the last decade and it has a bright future for the FIR region where production of structures is much easier. Unfortunately GaAs structures until now have had the status of experimental devices and are not available.
7 µm Θ=.38 Fig. 7: Schematic wave vector diagram for noncollinear DFG (a) and optical scheme of a GaAs nonlinear optical device (b). Internal FIR power versus pump power density on the 1.3 µm line calculated in assumption of equal power on each line (c). Another approach to obtain phase-matched FIR DFG in isotropic nonlinear materials is noncollinear mixing of two laser beams. This is possible in any crystal which possesses anomalous dispersion between the incident CO laser radiation and FIR difference frequency radiation. Zernike [15] and Aggarwal et al.[17] have demonstrated noncollinear mixing of two CO laser beams in liquid helium cooled semiconductor samples. By using a 1 cm long GaAs crystal of folded geometry, up to 4kW in the 1 µm region was generated [1]. Several reasons make GaAs the best candidate for generation of high-power 34 µm radiation using a noncollinear DFG scheme. It has a relatively high value for the electro-optic nonlinear coefficient d=43 pm/v. GaAs with high resistivity (> 1 8 Ωcm) is transparent in the FIR beyond µm at room temperature as well as in the 1 µm region of the CO laser [18]. High-quality, single crystals with a diameter of 15 cm and length up to 1 cm are commercially available. The expected surface damage threshold could reach 1 GW/cm for 1 ps CO laser pulses. We present results of calculations for a FIR nonlinear device made of GaAs below. For noncollinear phase-matched mixing of two laser lines of frequencies ω 1 and ω (ω 1 >ω ) to generate the difference-frequency radiation at ω 3, the conditions of photon energy and momentum conservation require that where r k 1, r k and r k 3 are the respective vectors for radiation of frequencies ω 1 (1.3 µm), ω (1.6µm), ω 3 (33 µm). Fig 7a. shows the direction of propagation of the incident beams and that of the difference frequency radiation inside the crystal. According to Aggarwal et al. [17], angles θ and ϕ are given by k k 3 Θ Sin( 1 (n ω ) (n1 ω n ω ) Θ) = 4n n ω ω 1 1 k 1 ϕ=1.6 b a ϕ µm FIR 34 µm ω 3 = ω 1 ω and r k 3 = r k 1 r k Internal FIR Power Density, MW/cm 1/ ; Cosϕ = c ω 1+( )Sin (.5Θ) ω ( ω 1 ω L = 5 cm L = 3 cm L = 1 cm 1.3 µm Power Density (P 1.3 =P 1.6 ), GW/cm ω 3 )Sin (.5Θ) 1
8 Refractive indices for insulating GaAs are n 1 n =3.8 at 1 µm region, and n 3 =3.61 at 34 µm [18]. For these values of refractive index we obtain Θ=.7 and ϕ=1.64. The corresponding external phasematching angle is.38 degrees. The angle at which FIR radiation propogates inside the crystal is greater than the critical angle for total internal reflection. Therefore, as it shown in Fig.7b, the output face of the GaAs crystal has to be cut at 1 degrees to release the newborn radiation. We also calculated the 34 µm power produced inside of a GaAs crystal for different interaction lengths L using standard Boyd and Kleinman relations [19]. For an isotropic material, the interaction length is limited only by the pulse length because of group velocity dispersion. For 1 ps pulses, the maximum L is approximately 6 cm. The above calculations were done assuming. cm -1 absorption at 34 µm [18] and neglecting absorption at 1 µm. Results are presented in Fig. 7c. Note that hatched section in Fig. 7c indicates our provisional zone for operation where the pump intensity of -4 GW/cm is more than two times less than the damage threshold for GaAs. As can be seen in Fig,7c the 1 MW level could be achieved even for a 1 cm incident area beam with L=5 cm and total pump power density GW/cm. FIR power level could be easily scalable beyond 1 MW by increasing the beam diameter. A typical beam diameter of the Neptune TW two-wavelength CO laser system is 1 cm with an intensity 1 GW/cm [7]. This beam, in combination with available large-aperture GaAs crystals, opens possibility to create a unique high-power 1-1 GW source of coherent radiation in the range of 7 µm mm (.-4 THz) on the base of noncollinear frequency mixing of CO laser lines. 5. Conclusions A feasibility study of phase-locked acceleration of electrons in a plasma based accelerating structure has shown that a THz IFEL microbuncher is a promising scheme. For Neptune PBWA experiment, it is possible to generate high-power (>1 MW) 34 µm radiation by using noncollinear DFG in GaAs. Optimization of the THz driven IFEL parameters demonstrates that requirements for the phased-injection system could be easily achieved. 6. References 1. C. Joshi and P. Corkum, Physics Today, 49, 36 (1996). C.E. Clayton, L. Serafini, IEEE Trans. Plasma Science, 4, 4 (1996). 3. Y. Liu et al., Phys. Rev. Lett., 8, 4418, W. Kimura et al., in Proceedings of Advanced Accelerator Concepts, Santa Fe, NM, 5. M.Lampel, C. Pellegrini, and R.Zhang, in Proc. Particle Accelerator Conf., Dallas, TX, S. Anderson et al, Proc. Particle Accelerator Conf., Chicago, IL, 1 7. S.Ya. Tochitsky, C. Filip, R. Narang, C.E. Clayton, K.Marsh, and C. Joshi, Optics Letters, 4, 1717 (1999). 8. E. D. Courant, C. Pellegrini, W. Zakowicz, Phys. Rev. Lett., 3, 813, L. Giannessi et al., Nucl. Instr. Meth., 393, 434, P. Musumeci, C.Pellegrini, J.B. Rosenzweig, A. Varfolomeev, S. Tomalchev, T. Yarovoi, Proc. Particle Accelerator Conf.,Chicago, IL, P.B. Corkum, P.P. Ho, R.R. Alfano, and J.T. Manassah Optics. Lett. 1, 64 (1985). 1. G.D. Boyd, T. J. Bridges, and C.K.N. Patel, and E. Buehler, Appl.Phys. Lett. 1, 553 (197). 13. V.V. Apollonov, R. Bocquet, A. Boscheron, A.I. Gribenyukov, V.V. Korotkova, C. Rouyer, A.G. Suzdal tsev, Yu. A. Shakir, Int. Journal Infrared M. Waves, 17, 1465 (1996). 14. F. Zernike, Phys. Rev. Lett., 931 (1969). 15. T.J. Bridges, A.R. Strand, Appl.Phys. Lett., 38 (197). 16. R.L. Aggarwal, B. Lax, and G. Favrot, Appl.Phys. Lett., 39 (1973). 17. N. Lee, B. Lax, and R.L. Aggarwal, Optics Commun. 18, 5 (1976). 18. C.J. Johnson, G.H. Sherman, and R. Weil, Appl. Optics, 8, 1667 (1969). 19. G.D. Boyd, D.A. Kleinman, J.Appl.Phys. 39, 3597 (1968).
9
Study of a THz IFEL prebuncher for laser-plasma accelerators
Study of a THz IFEL prebuncher for laser-plasma accelerators C. Sung 1, S. Ya. Tochitsky 1, P. Musumeci, J. Ralph 1, J. B. Rosenzweig, C. Pellegrini, and C. Joshi 1 Neptune Laboratory, 1 Department of
More informationHigh Energy Gain Helical Inverse Free Electron Laser Accelerator at Brookhaven National Laboratory
High Energy Gain Helical Inverse Free Electron Laser Accelerator at Brookhaven National Laboratory J. Duris 1, L. Ho 1, R. Li 1, P. Musumeci 1, Y. Sakai 1, E. Threlkeld 1, O. Williams 1, M. Babzien 2,
More informationUCLA Neptune Facility for Advanced Accelerator Studies
UCLA Neptune Facility for Advanced Accelerator Studies Sergei Ya. Tochitsky, 1 Christopher E. Clayton, 1 Kenneth A. Marsh, 1 James B. Rosenzweig, 2 Claudio Pellegrini 2 and Chandrashekhar Joshi 1 Neptune
More informationNON LINEAR PULSE EVOLUTION IN SEEDED AND CASCADED FELS
NON LINEAR PULSE EVOLUTION IN SEEDED AND CASCADED FELS L. Giannessi, S. Spampinati, ENEA C.R., Frascati, Italy P. Musumeci, INFN & Dipartimento di Fisica, Università di Roma La Sapienza, Roma, Italy Abstract
More informationA Helical Undulator Wave-guide Inverse Free- Electron Laser
A Helical Undulator Wave-guide Inverse Free- Electron Laser J. Rosenzweig*, N. Bodzin*, P. Frigola*, C. Joshi ℵ, P. Musumeci*, C. Pellegrini*, S. Tochitsky ℵ, and G. Travish* *UCLA Dept. of Physics and
More information4 FEL Physics. Technical Synopsis
4 FEL Physics Technical Synopsis This chapter presents an introduction to the Free Electron Laser (FEL) physics and the general requirements on the electron beam parameters in order to support FEL lasing
More informationPushing the limits of laser synchrotron light sources
Pushing the limits of laser synchrotron light sources Igor Pogorelsky National Synchrotron Light Source 2 Synchrotron light source With λ w ~ several centimeters, attaining XUV region requires electron
More informationAcceleration of electrons by Inverse Free Electron Laser interaction
Acceleration of electrons by Inverse Free Electron Laser interaction P. Musumeci 3.12.2004 Università La Sapienza, Roma Outline Laser accelerators Brief IFEL introduction Inverse-Free-Electron-Laser accelerators
More informationX-ray Free-electron Lasers
X-ray Free-electron Lasers Ultra-fast Dynamic Imaging of Matter II Ischia, Italy, 4/30-5/3/ 2009 Claudio Pellegrini UCLA Department of Physics and Astronomy Outline 1. Present status of X-ray free-electron
More informationVARIABLE GAP UNDULATOR FOR KEV FREE ELECTRON LASER AT LINAC COHERENT LIGHT SOURCE
LCLS-TN-10-1, January, 2010 VARIABLE GAP UNDULATOR FOR 1.5-48 KEV FREE ELECTRON LASER AT LINAC COHERENT LIGHT SOURCE C. Pellegrini, UCLA, Los Angeles, CA, USA J. Wu, SLAC, Menlo Park, CA, USA We study
More informationHigh-power tunable, THz radiation source based on nonlinear difference frequency mixing of CO 2 laser lines
Tochitsky et al. Vol. 24, No. 9/September 2007/ J. Opt. Soc. Am. B 2509 High-power tunable, 0.5 3 THz radiation source based on nonlinear difference frequency mixing of CO 2 laser lines Sergei Ya. Tochitsky,
More informationCharacterization of an 800 nm SASE FEL at Saturation
Characterization of an 800 nm SASE FEL at Saturation A.Tremaine*, P. Frigola, A. Murokh, C. Pellegrini, S. Reiche, J. Rosenzweig UCLA, Los Angeles, CA 90095 M. Babzien, I. Ben-Zvi, E. Johnson, R. Malone,
More informationGenerating intense attosecond x-ray pulses using ultraviolet-laser-induced microbunching in electron beams. Abstract
Febrary 2009 SLAC-PUB-13533 Generating intense attosecond x-ray pulses using ultraviolet-laser-induced microbunching in electron beams D. Xiang, Z. Huang and G. Stupakov SLAC National Accelerator Laboratory,
More informationTraveling Wave Undulators for FELs and Synchrotron Radiation Sources
LCLS-TN-05-8 Traveling Wave Undulators for FELs and Synchrotron Radiation Sources 1. Introduction C. Pellegrini, Department of Physics and Astronomy, UCLA 1 February 4, 2005 We study the use of a traveling
More informationExperimental Measurements of the ORION Photoinjector Drive Laser Oscillator Subsystem
Experimental Measurements of the ORION Photoinjector Drive Laser Oscillator Subsystem D.T Palmer and R. Akre Laser Issues for Electron RF Photoinjectors October 23-25, 2002 Stanford Linear Accelerator
More informationPoS(EPS-HEP2017)533. First Physics Results of AWAKE, a Plasma Wakefield Acceleration Experiment at CERN. Patric Muggli, Allen Caldwell
First Physics Results of AWAKE, a Plasma Wakefield Acceleration Experiment at CERN Patric Muggli, Max Planck Institute for Physics E-mail: muggli@mpp.mpg.de AWAKE is a plasma wakefield acceleration experiment
More informationSPARCLAB. Source For Plasma Accelerators and Radiation Compton. On behalf of SPARCLAB collaboration
SPARCLAB Source For Plasma Accelerators and Radiation Compton with Laser And Beam On behalf of SPARCLAB collaboration EMITTANCE X X X X X X X X 2 BRIGHTNESS (electrons) B n 2I nx ny A m 2 rad 2 The current
More informationFree Electron Laser. Project report: Synchrotron radiation. Sadaf Jamil Rana
Free Electron Laser Project report: Synchrotron radiation By Sadaf Jamil Rana History of Free-Electron Laser (FEL) The FEL is the result of many years of theoretical and experimental work on the generation
More informationSPARCLAB. Source For Plasma Accelerators and Radiation Compton with Laser And Beam
SPARCLAB Source For Plasma Accelerators and Radiation Compton with Laser And Beam EMITTANCE X X X X X X X X Introduction to SPARC_LAB 2 BRIGHTNESS (electrons) B n 2I nx ny A m 2 rad 2 The current can be
More informationBrightness and Coherence of Synchrotron Radiation and Free Electron Lasers. Zhirong Huang SLAC, Stanford University May 13, 2013
Brightness and Coherence of Synchrotron Radiation and Free Electron Lasers Zhirong Huang SLAC, Stanford University May 13, 2013 Introduction GE synchrotron (1946) opened a new era of accelerator-based
More informationINVESTIGATIONS OF THE DISTRIBUTION IN VERY SHORT ELECTRON BUNCHES LONGITUDINAL CHARGE
INVESTIGATIONS OF THE LONGITUDINAL CHARGE DISTRIBUTION IN VERY SHORT ELECTRON BUNCHES Markus Hüning III. Physikalisches Institut RWTH Aachen IIIa and DESY Invited talk at the DIPAC 2001 Methods to obtain
More informationR&D experiments at BNL to address the associated issues in the Cascading HGHG scheme
R&D experiments at BNL to address the associated issues in the Cascading HGHG scheme Li Hua Yu for DUV-FEL Team National Synchrotron Light Source Brookhaven National Laboratory FEL2004 Outline The DUVFEL
More informationOPTIMIZING RF LINACS AS DRIVERS FOR INVERSE COMPTON SOURCES: THE ELI-NP CASE
OPTIMIZING RF LINACS AS DRIVERS FOR INVERSE COMPTON SOURCES: THE ELI-NP CASE C. Vaccarezza, D. Alesini, M. Bellaveglia, R. Boni, E. Chiadroni, G. Di Pirro, M. Ferrario, A. Gallo, G. Gatti, A. Ghigo, B.
More informationSTART-TO-END SIMULATIONS FOR IR/THZ UNDULATOR RADIATION AT PITZ
Proceedings of FEL2014, Basel, Switzerland MOP055 START-TO-END SIMULATIONS FOR IR/THZ UNDULATOR RADIATION AT PITZ P. Boonpornprasert, M. Khojoyan, M. Krasilnikov, F. Stephan, DESY, Zeuthen, Germany B.
More informationGeneration of Femtosecond Electron Pulses
Generation of Femtosecond Electron Pulses W. D. Kimura STI Optronics, Inc., 755 Northup Way, Bellevue, WA 984-1495, USA Two techniques for generation of femtosecond electron pulses will be presented. The
More informationExperimental Optimization of Electron Beams for Generating THz CTR and CDR with PITZ
Experimental Optimization of Electron Beams for Generating THz CTR and CDR with PITZ Introduction Outline Optimization of Electron Beams Calculations of CTR/CDR Pulse Energy Summary & Outlook Prach Boonpornprasert
More informationX-Band RF Harmonic Compensation for Linear Bunch Compression in the LCLS
SLAC-TN-5- LCLS-TN-1-1 November 1,1 X-Band RF Harmonic Compensation for Linear Bunch Compression in the LCLS Paul Emma SLAC November 1, 1 ABSTRACT An X-band th harmonic RF section is used to linearize
More informationBeam Echo Effect for Generation of Short Wavelength Radiation
Beam Echo Effect for Generation of Short Wavelength Radiation G. Stupakov SLAC NAL, Stanford, CA 94309 31st International FEL Conference 2009 Liverpool, UK, August 23-28, 2009 1/31 Outline of the talk
More informationLinac Driven Free Electron Lasers (III)
Linac Driven Free Electron Lasers (III) Massimo.Ferrario@lnf.infn.it SASE FEL Electron Beam Requirements: High Brightness B n ( ) 1+ K 2 2 " MIN r #$ % &B! B n 2 n K 2 minimum radiation wavelength energy
More informationASTRA simulations of the slice longitudinal momentum spread along the beamline for PITZ
ASTRA simulations of the slice longitudinal momentum spread along the beamline for PITZ Orlova Ksenia Lomonosov Moscow State University GSP-, Leninskie Gory, Moscow, 11999, Russian Federation Email: ks13orl@list.ru
More informationExperimental Observation of Energy Modulation in Electron Beams Passing. Through Terahertz Dielectric Wakefield Structures
Experimental Observation of Energy Modulation in Electron Beams Passing Through Terahertz Dielectric Wakefield Structures S. Antipov 1,3, C. Jing 1,3, M. Fedurin 2, W. Gai 3, A. Kanareykin 1, K. Kusche
More informationSL_COMB. The SL_COMB experiment at SPARC_LAB will operate in the so-called quasinonlinear regime, defined by the dimensionless charge quantity
SL_COMB E. Chiadroni (Resp), D. Alesini, M. P. Anania (Art. 23), M. Bellaveglia, A. Biagioni (Art. 36), S. Bini (Tecn.), F. Ciocci (Ass.), M. Croia (Dott), A. Curcio (Dott), M. Daniele (Dott), D. Di Giovenale
More informationTransverse emittance measurements on an S-band photocathode rf electron gun * Abstract
SLAC PUB 8963 LCLS-01-06 October 2001 Transverse emittance measurements on an S-band photocathode rf electron gun * J.F. Schmerge, P.R. Bolton, J.E. Clendenin, F.-J. Decker, D.H. Dowell, S.M. Gierman,
More informationMagnetically Induced Transparency and Its Application as an Accelerator
Magnetically Induced Transparency and Its Application as an Accelerator M.S. Hur, J.S. Wurtele and G. Shvets University of California Berkeley University of California Berkeley and Lawrence Berkeley National
More informationNew Electron Source for Energy Recovery Linacs
New Electron Source for Energy Recovery Linacs Ivan Bazarov 20m Cornell s photoinjector: world s brightest electron source 1 Outline Uses of high brightness electron beams Physics of brightness High brightness
More informationElectron Linear Accelerators & Free-Electron Lasers
Electron Linear Accelerators & Free-Electron Lasers Bryant Garcia Wednesday, July 13 2016. SASS Summer Seminar Bryant Garcia Linacs & FELs 1 of 24 Light Sources Why? Synchrotron Radiation discovered in
More informationVELA/CLARA as Advanced Accelerator Studies Test-bed at Daresbury Lab.
VELA/CLARA as Advanced Accelerator Studies Test-bed at Daresbury Lab. Yuri Saveliev on behalf of VELA and CLARA teams STFC, ASTeC, Cockcroft Institute Daresbury Lab., UK Outline VELA (Versatile Electron
More informationICFA ERL Workshop Jefferson Laboratory March 19-23, 2005 Working Group 1 summary Ilan Ben-Zvi & Ivan Bazarov
ICFA ERL Workshop Jefferson Laboratory March 19-23, 2005 Working Group 1 summary Ilan Ben-Zvi & Ivan Bazarov Sincere thanks to all WG1 participants: Largest group, very active participation. This summary
More informationThe UCLA/LLNL Inverse Compton Scattering Experiment: PLEIADES
The UCLA/LLNL Inverse Compton Scattering Experiment: PLEIADES J.B. Rosenzweig UCLA Department of Physics and Astronomy 23 Giugno, 2003 Introduction Inverse Compton scattering provides a path to 4th generation
More informationOPTIMIZATION OF COMPENSATION CHICANES IN THE LCLS-II BEAM DELIVERY SYSTEM
OPTIMIZATION OF COMPENSATION CHICANES IN THE LCLS-II BEAM DELIVERY SYSTEM LCLS-II TN-15-41 11/23/2015 J. Qiang, M. Venturini November 23, 2015 LCLSII-TN-15-41 1 Introduction L C L S - I I T E C H N I C
More informationTwo-Stage Chirped-Beam SASE-FEL for High Power Femtosecond X-Ray Pulse Generation
Two-Stage Chirped-Beam SASE-FEL for High ower Femtosecond X-Ray ulse Generation C. Schroeder*, J. Arthur^,. Emma^, S. Reiche*, and C. ellegrini* ^ Stanford Linear Accelerator Center * UCLA 12-10-2001 LCLS-TAC
More informationLCLS Injector Prototyping at the GTF
LCLS Injector Prototyping at at the GTF John John Schmerge, SLAC SLAC November 3, 3, 23 23 GTF GTF Description Summary of of Previous Measurements Longitudinal Emittance Transverse Emittance Active LCLS
More informationMaRIE. MaRIE X-Ray Free-Electron Laser Pre-Conceptual Design
Operated by Los Alamos National Security, LLC, for the U.S. Department of Energy MaRIE (Matter-Radiation Interactions in Extremes) MaRIE X-Ray Free-Electron Laser Pre-Conceptual Design B. Carlsten, C.
More informationLinac optimisation for the New Light Source
Linac optimisation for the New Light Source NLS source requirements Electron beam requirements for seeded cascade harmonic generation LINAC optimisation (2BC vs 3 BC) CSR issues energy chirp issues jitter
More informationGeneration of GW-level, sub-angstrom Radiation in the LCLS using a Second-Harmonic Radiator. Abstract
SLAC PUB 10694 August 2004 Generation of GW-level, sub-angstrom Radiation in the LCLS using a Second-Harmonic Radiator Z. Huang Stanford Linear Accelerator Center, Menlo Park, CA 94025 S. Reiche UCLA,
More informationFIRST DEMONSTRATION OF STAGED LASER ACCELERATION
Proceedings of the Particle Accelerator Conference, Chicago FIRT DEMOTRATIO OF TAGED LAER ACCELERATIO W. D. Kimura, L. P. Campbell, C. E. Dilley,. C. Gottschalk, D. C. Quimby, TI Optronics, Inc., Bellevue,
More informationLayout of the HHG seeding experiment at FLASH
Layout of the HHG seeding experiment at FLASH V. Miltchev on behalf of the sflash team: A. Azima, J. Bödewadt, H. Delsim-Hashemi, M. Drescher, S. Düsterer, J. Feldhaus, R. Ischebeck, S. Khan, T. Laarmann
More informationObservation of Ultra-Wide Bandwidth SASE FEL
Observation of Ultra-Wide Bandwidth SASE FEL Gerard Andonian Particle Beam Physics Laboratory University of California Los Angeles The Physics and Applications of High Brightness Electron Beams Erice,
More informationPAL LINAC UPGRADE FOR A 1-3 Å XFEL
PAL LINAC UPGRADE FOR A 1-3 Å XFEL J. S. Oh, W. Namkung, Pohang Accelerator Laboratory, POSTECH, Pohang 790-784, Korea Y. Kim, Deutsches Elektronen-Synchrotron DESY, D-603 Hamburg, Germany Abstract With
More informationLecture 4: Emittance Compensation. J.B. Rosenzweig USPAS, UW-Madision 6/30/04
Lecture 4: Emittance Compensation J.B. Rosenzweig USPAS, UW-Madision 6/30/04 Emittance minimization in the RF photoinjector Thermal emittance limit Small transverse beam size Avoid metal cathodes? n,th
More informationConstruction of a 100-TW laser and its applications in EUV laser, wakefield accelerator, and nonlinear optics
Construction of a 100-TW laser and its applications in EUV laser, wakefield accelerator, and nonlinear optics Jyhpyng Wang ( ) Institute of Atomic and Molecular Sciences Academia Sinica, Taiwan National
More informationSimulations of the IR/THz Options at PITZ (High-gain FEL and CTR)
Case Study of IR/THz source for Pump-Probe Experiment at the European XFEL Simulations of the IR/THz Options at PITZ (High-gain FEL and CTR) Introduction Outline Simulations of High-gain FEL (SASE) Simulation
More informationSRF GUN CHARACTERIZATION - PHASE SPACE AND DARK CURRENT MEASUREMENTS AT ELBE*
SRF GUN CHARACTERIZATION - PHASE SPACE AND DARK CURRENT MEASUREMENTS AT ELBE* E. Panofski #, A. Jankowiak, T. Kamps, Helmholtz-Zentrum Berlin, Berlin, Germany P.N. Lu, J. Teichert, Helmholtz-Zentrum Dresden-Rossendorf,
More informationEcho-Enabled Harmonic Generation
Echo-Enabled Harmonic Generation G. Stupakov SLAC NAL, Stanford, CA 94309 IPAC 10, Kyoto, Japan, May 23-28, 2010 1/29 Outline of the talk Generation of microbunching in the beam using the echo effect mechanism
More informationBeam manipulation with high energy laser in accelerator-based light sources
Beam manipulation with high energy laser in accelerator-based light sources Ming-Chang Chou High Brightness Injector Group FEL winter school, Jan. 29 ~ Feb. 2, 2018 Outline I. Laser basic II. III. IV.
More informationWG2 on ERL light sources CHESS & LEPP
Charge: WG2 on ERL light sources Address and try to answer a list of critical questions for ERL light sources. Session leaders can approach each question by means of (a) (Very) short presentations (b)
More informationAdvances in Inverse Free Electron Laser accelerators and implications for high efficiency FELs
Advances in Inverse Free Electron Laser accelerators and implications for high efficiency FELs P. Musumeci UCLA Department of Physics and Astronomy Noce workshop, Arcidosso, September 20 th 2017 Outline
More informationarxiv: v1 [physics.acc-ph] 1 Jan 2014
The Roads to LPA Based Free Electron Laser Xiongwei Zhu Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049 arxiv:1401.0263v1 [physics.acc-ph] 1 Jan 2014 January 3, 2014 Abstract
More informationEmittance Compensation. J.B. Rosenzweig ERL Workshop, Jefferson Lab 3/20/05
Emittance Compensation J.B. Rosenzweig ERL Workshop, Jefferson Lab 3//5 Emittance minimization in the RF photoinjector Thermal emittance limit Small transverse beam size Avoid metal cathodes? " n,th #
More informationLecture 5: Photoinjector Technology. J. Rosenzweig UCLA Dept. of Physics & Astronomy USPAS, 7/1/04
Lecture 5: Photoinjector Technology J. Rosenzweig UCLA Dept. of Physics & Astronomy USPAS, 7/1/04 Technologies Magnetostatic devices Computational modeling Map generation RF cavities 2 cell devices Multicell
More informationOPERATING OF SXFEL IN A SINGLE STAGE HIGH GAIN HARMONIC GENERATION SCHEME
OPERATING OF SXFEL IN A SINGLE STAGE HIGH GAIN HARMONIC GENERATION SCHEME Guanglei Wang, Weiqing Zhang, Guorong Wu, Dongxu Dai, Xueming Yang # State Key Laboratory of Molecular Reaction Dynamics, Dalian
More informationStatus of linear collider designs:
Status of linear collider designs: Electron and positron sources Design overview, principal open issues G. Dugan March 11, 2002 Electron sourcesfor 500 GeV CM machines Parameter TESLA NLC CLIC Cycle rate
More informationLinac Based Photon Sources: XFELS. Coherence Properties. J. B. Hastings. Stanford Linear Accelerator Center
Linac Based Photon Sources: XFELS Coherence Properties J. B. Hastings Stanford Linear Accelerator Center Coherent Synchrotron Radiation Coherent Synchrotron Radiation coherent power N 6 10 9 incoherent
More informationBeam Dynamics in a Hybrid Standing Wave- Traveling Wave Photoinjector
Beam Dynamics in a Hybrid Standing Wave- Traveling Wave Photoinjector J. Rosenzweig, D. Alesini, A. Boni, M. Ferrario, A. Fukusawa, A. Mostacci $, B. O Shea, L. Palumbo $, B. Spataro UCLA Dept. of Physics
More informationCompact Wideband THz Source
Compact Wideband THz Source G. A. Krafft Center for Advanced Studies of Accelerators Jefferson Lab Newport News, VA 3608 Previously, I have published a paper describing compact THz radiation sources based
More informationSwissFEL INJECTOR DESIGN: AN AUTOMATIC PROCEDURE
Proceedings of FEL03, New York, NY, USA SwissFEL INJECTOR DESIGN: AN AUTOMATIC PROCEDURE S. Bettoni, M. Pedrozzi, S. Reiche, PSI, Villigen, Switzerland Abstract The first section of FEL injectors driven
More informationSimulations of the IR/THz source at PITZ (SASE FEL and CTR)
Simulations of the IR/THz source at PITZ (SASE FEL and CTR) Introduction Outline Simulations of SASE FEL Simulations of CTR Summary Issues for Discussion Mini-Workshop on THz Option at PITZ DESY, Zeuthen
More informationHarmonic Lasing Self-Seeded FEL
Harmonic Lasing Self-Seeded FEL E. Schneidmiller and M. Yurkov FEL seminar, DESY Hamburg June 21, 2016 In a planar undulator (K ~ 1 or K >1) the odd harmonics can be radiated on-axis (widely used in SR
More informationHigher harmonic inverse free-electron laser interaction
PHYSICAL REVIEW E 72, 016501 2005 Higher harmonic inverse free-electron laser interaction P. Musumeci, 1 C. Pellegrini, 2 and J. B. Rosenzweig 2 1 Dipartimento di Fisica and INFN, Università di Roma La
More informationILC Particle Sources -Electron and PositronMasao KURIKI (Hiroshima University)
ILC Particle Sources -Electron and PositronMasao KURIKI (Hiroshima University) Introduction Electron Polarization is important for ILC. NEA GaAs is practically the only solution. Positron polarization
More informationHiromitsu TOMIZAWA XFEL Division /SPring-8
TUPLB10 (Poster: TUPB080) Non-destructive Real-time Monitor to measure 3D- Bunch Charge Distribution with Arrival Timing to maximize 3D-overlapping for HHG-seeded EUV-FEL Hiromitsu TOMIZAWA XFEL Division
More informationBeam Shaping and Permanent Magnet Quadrupole Focusing with Applications to the Plasma Wakefield Accelerator
Beam Shaping and Permanent Magnet Quadrupole Focusing with Applications to the Plasma Wakefield Accelerator R. Joel England J. B. Rosenzweig, G. Travish, A. Doyuran, O. Williams, B. O Shea UCLA Department
More informationAccelerator Physics. Tip World Scientific NEW JERSEY LONDON SINGAPORE BEIJING SHANGHAI HONG KONG TAIPEI BANGALORE. Second Edition. S. Y.
Accelerator Physics Second Edition S. Y. Lee Department of Physics, Indiana University Tip World Scientific NEW JERSEY LONDON SINGAPORE BEIJING SHANGHAI HONG KONG TAIPEI BANGALORE Contents Preface Preface
More informationAn Adventure in Marrying Laser Arts and Accelerator Technologies
An Adventure in Marrying Laser Arts and Accelerator Technologies Dao Xiang Beam Physics Dept, SLAC, Stanford University Feb-28-2012 An example sample Probe (electron) Pump (laser) Typical pump-probe experiment
More information4GLS Status. Susan L Smith ASTeC Daresbury Laboratory
4GLS Status Susan L Smith ASTeC Daresbury Laboratory Contents ERLP Introduction Status (Kit on site ) Plan 4GLS (Conceptual Design) Concept Beam transport Injectors SC RF FELs Combining Sources May 2006
More informationUsing IMPACT T to perform an optimization of a DC gun system Including merger
Using IMPACT T to perform an optimization of a DC gun system Including merger Xiaowei Dong and Michael Borland Argonne National Laboratory Presented at ERL09 workshop June 10th, 2009 Introduction An energy
More informationIntroduction. Thermoionic gun vs RF photo gun Magnetic compression vs Velocity bunching. Probe beam design options
Introduction Following the 19/05/04 meeting at CERN about the "CTF3 accelerated programme", a possible french contribution has been envisaged to the 200 MeV Probe Beam Linac Two machine options were suggested,
More informationFREE-ELECTRON LASER FACILITY(U) NATIONAL BUREAU OF STANDARDS GAITHERSBURG NO P H DEBENHdAN ET AL UNCLASSIFIED F/G 14/2 NI
-R9 IN1 RESEARCH OPPORTUNITIES BELOWd 398 NN AT THE NOS / FREE-ELECTRON LASER FACILITY(U) NATIONAL BUREAU OF STANDARDS GAITHERSBURG NO P H DEBENHdAN ET AL. 1907 UNCLASSIFIED F/G 14/2 NI 1Z, II"',,-- -.-
More information$)ODW%HDP(OHFWURQ6RXUFHIRU/LQHDU&ROOLGHUV
$)ODW%HDP(OHFWURQ6RXUFHIRU/LQHDU&ROOLGHUV R. Brinkmann, Ya. Derbenev and K. Flöttmann, DESY April 1999 $EVWUDFW We discuss the possibility of generating a low-emittance flat (ε y
More informationCONCEPTUAL STUDY OF A SELF-SEEDING SCHEME AT FLASH2
CONCEPTUAL STUDY OF A SELF-SEEDING SCHEME AT FLASH2 T. Plath, L. L. Lazzarino, Universität Hamburg, Hamburg, Germany K. E. Hacker, T.U. Dortmund, Dortmund, Germany Abstract We present a conceptual study
More informationDemonstration of cascaded modulatorchicane pre-bunching for enhanced. trapping in an Inverse Free Electron Laser
Demonstration of cascaded modulatorchicane pre-bunching for enhanced trapping in an Inverse Free Electron Laser Nicholas Sudar UCLA Department of Physics and Astronomy Overview Review of pre-bunching Cascaded
More informationFree-electron laser SACLA and its basic. Yuji Otake, on behalf of the members of XFEL R&D division RIKEN SPring-8 Center
Free-electron laser SACLA and its basic Yuji Otake, on behalf of the members of XFEL R&D division RIKEN SPring-8 Center Light and Its Wavelength, Sizes of Material Virus Mosquito Protein Bacteria Atom
More informationMATTHEW COLIN THOMPSON
MATTHEW COLIN THOMPSON Office: University of California, Los Angeles 3-166 Knudsen Hall e-mail: mct@physics.ucla.edu Phone: 310 825-9982 EDUCATION Doctor of Philosophy Physics, June 2004, University of
More informationAnalysis of Slice Transverse Emittance Evolution in a Photocathode RF Gun. Abstract
SLAC PUB 868 October 7 Analysis of Slice Transverse Emittance Evolution in a Photocathode RF Gun Z. Huang, Y. Ding Stanford Linear Accelerator Center, Stanford, CA 9439 J. Qiang Lawrence Berkeley National
More informationPhotoinjector design for the LCLS
SLAC-PUB-8962 LCLS-TN-01-05 Revised November 2001 Photoinjector design for the LCLS P.R. Bolton a, J.E. Clendenin a, D.H. Dowell a, M. Ferrario b, A.S. Fisher a, S.M. Gierman a, R.E. Kirby a, P. Krejcik
More informationII) Experimental Design
SLAC Experimental Advisory Committee --- September 12 th, 1997 II) Experimental Design Theory and simulations Great promise of significant scientific and technological achievements! How to realize this
More informationFEL SIMULATION AND PERFORMANCE STUDIES FOR LCLS-II
FEL SIMULATION AND PERFORMANCE STUDIES FOR LCLS-II G. Marcus, Y. Ding, P. Emma, Z. Huang, T. Raubenheimer, L. Wang, J. Wu SLAC, Menlo Park, CA 9, USA Abstract The design and performance of the LCLS-II
More informationInvestigation of the Feasibility of a Free Electron Laser for the Cornell Electron Storage Ring and Linear Accelerator
Investigation of the Feasibility of a Free Electron Laser for the Cornell Electron Storage Ring and Linear Accelerator Marty Zwikel Department of Physics, Grinnell College, Grinnell, IA, 50 Abstract Free
More informationAREAL Test Facility for Advanced Accelerator and Radiation Sources Concepts
2 nd European Advanced Accelerator Concepts AREAL Test Facility for Advanced Accelerator and Radiation Sources Concepts V. Tsakanov CANDLE SRI 13-19 Sep 2015, La Biodola, Isola d'elba Introduction 2nd
More informationLCLS Accelerator Parameters and Tolerances for Low Charge Operations
LCLS-TN-99-3 May 3, 1999 LCLS Accelerator Parameters and Tolerances for Low Charge Operations P. Emma SLAC 1 Introduction An option to control the X-ray FEL output power of the LCLS [1] by reducing the
More informationMultiparameter optimization of an ERL. injector
Multiparameter optimization of an ERL injector R. Hajima a, R. Nagai a a Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki 319 1195 Japan Abstract We present multiparameter optimization of an
More informationExperimental study of nonlinear laser-beam Thomson scattering
Experimental study of nonlinear laser-beam Thomson scattering T. Kumita, Y. Kamiya, T. Hirose Department of Physics, Tokyo Metropolitan University, 1-1 Minami-Ohsawa, Hachioji, Tokyo 192-0397, Japan I.
More informationLaser acceleration of electrons at Femilab/Nicadd photoinjector
Laser acceleration of electrons at Femilab/Nicadd photoinjector P. Piot (FermiLab), R. Tikhoplav (University of Rochester) and A.C. Melissinos (University of Rochester) FNPL energy upgrade Laser acceleration
More informationAccelerator Physics Issues of ERL Prototype
Accelerator Physics Issues of ERL Prototype Ivan Bazarov, Geoffrey Krafft Cornell University TJNAF ERL site visit (Mar 7-8, ) Part I (Bazarov). Optics. Space Charge Emittance Compensation in the Injector
More informationLasers and Electro-optics
Lasers and Electro-optics Second Edition CHRISTOPHER C. DAVIS University of Maryland III ^0 CAMBRIDGE UNIVERSITY PRESS Preface to the Second Edition page xv 1 Electromagnetic waves, light, and lasers 1
More informationPhysical design of FEL injector based on performance-enhanced EC-ITC RF gun
Accepted by Chinese Physics C Physical design of FEL injector based on performance-enhanced EC-ITC RF gun HU Tong-ning( 胡桐宁 ) 1, CHEN Qu-shan( 陈曲珊 ) 1, PEI Yuan-ji( 裴元吉 ) 2; 1), LI Ji( 李骥 ) 2, QIN Bin(
More informationUSPAS course on Recirculated and Energy Recovered Linacs Ivan Bazarov, Cornell University Geoff Krafft, JLAB. ERL as a X-ray Light Source
USPAS course on Recirculated and Energy Recovered Linacs Ivan Bazarov, Cornell University Geoff Krafft, JLAB ERL as a X-ray Light Source Contents Introduction Light sources landscape General motivation
More informationDiagnostic Systems for Characterizing Electron Sources at the Photo Injector Test Facility at DESY, Zeuthen site
1 Diagnostic Systems for Characterizing Electron Sources at the Photo Injector Test Facility at DESY, Zeuthen site Sakhorn Rimjaem (on behalf of the PITZ team) Motivation Photo Injector Test Facility at
More informationMULTI-DIMENSIONAL FREE-ELECTRON LASER SIMULATION CODES: A COMPARISON STUDY *
SLAC-PUB-9729 April 2003 Presented at 21st International Conference on Free Electron Laser and 6th FEL Applications Workshop (FEL 99, Hamburg, Germany, 23-28 Aug 1999. MULTI-DIMENSIONAL FREE-ELECT LASER
More informationFURTHER UNDERSTANDING THE LCLS INJECTOR EMITTANCE*
Proceedings of FEL014, Basel, Switzerland FURTHER UNDERSTANDING THE LCLS INJECTOR EMITTANCE* F. Zhou, K. Bane, Y. Ding, Z. Huang, and H. Loos, SLAC, Menlo Park, CA 9405, USA Abstract Coherent optical transition
More information