Center for the Advancement of Natural Discoveries using Light Emission AREAL. Facility Status and Highlights. V. Tsakanov. 12 July 2016, DESY, Hamburg

Transcription

1 Center for the Advancement of Natural Discoveries using Light Emission AREAL Facility Status and Highlights V. Tsakanov 12 July 2016, DESY, Hamburg

2 Contents Introduction CANDLE First Stage AREAL Figure of Merits Ultrafast Sciences Facility Performance and First Beam Experimental Program Highlights Summary

3 Introduction A.I. Alikhanian Construction of 6 GeV synchrotron (1967) Three Synchrotron Radiation Beamlines Lab. of Radiation Solid State Physics Lab. of Radiation Biophysics Solid State Dept of Yerevan State Univ.

4 LUE- 20 MeV Test Facility Prof. Eduard Laziev - Yerevan Physics Institute Energy 20 MeV Pulse lenght 5 psec Bunch charge 300 pc RF frequency- 3 GHz Emittance 20 mm-mrad Not completed Nor-Amberd, Yerevan 2 nd International workshop- New Methods of Particle Acceleration ~25 years ago A.Amatuni, B. Palmer,T. Weiland, T. Katsouleas, J. Simpson, A. Sarantsev, H. Henke, E. Laziev, S. Novokhatski, C. Pellegrini, R. Jameson Experimental program Wake Field Accel. Plasma WFA Laser-Plasma Accel Two Beam Accel. High Freq. Accel. Inverse FEL THz radiation

5 3 GeV CANDLE Light Source Energy Current Circumference Emittance 3 GeV 350 ma 216 m 8.4 nm 2010-DESY-PSI-CANDLE Collaboration Workshop AREAL Sub-nm CANDLE Storage Ring, A. Sargsyan et al, NIM-A, 2016

6 First phase- AREAL Exit Scenario Small facility + Limited investment State-of-the art facility Scientific &Technology asset Multiple applications Training and Educ. Center Ultrafast Science and Technology Ultrashort bunches sub ps Small emittance < 0.5 µm International cooperation! DESY PSI TAC

7 AREAL Advanced Research Electron Accelerator Lab UV Laser Control room Exp. Station 1 Advanced Accel Concepts RF Gun ACC-1 ACC-2 Energy MeV Exp. Hall 2 6MW Cl-1 7MW Cl-2 7MW Cl-3 Applied Research Start July 2011

8 Beam Parameters Energy 5-20 MeV Bunch length ps Emittance 0.5 µm Bunch charge pc Frequency 1-50Hz Photocathode Quantum Effic. Work function Damage thresh. Lifetime Cost Maintan, Figure of Merits RF Gun Frequency Accel. grad Cost&Mainten Laser Wavelength Power Pulse length Time-structure Cost & Mainten

9 Photocathode Parameters Metals (Cu) Coated Met. (CuBa) Semiconduct. (Cs 2 Te) QE (%) Work funct W (ev) Damage Thr (mj/cm 2 ) Lifetime >Year Months Months Response Time (ps) <0.02 ~ 0.5 >1 Vacuum ( ntorr) Cost cell RF gun Freq - 3 GHz Qual Fact Shunt Imp 4.2 MΩ Peak V 100 MV/m λ nm (4.8 ev) Pulse Length ps Pulse Power > 100 µj Multi-bunch module High level of control

10 Beam Dynamics Energy MeV Emittance < 0.5 um Energy spread -0.1% Bunch length 0.1-1ps Bunch charge pC Emittance and beam size Energy Spread at Gun exit Beam profile

11 RF System 7 MW Klystron Amplitude Flatness <1 %

12 Laser System t-pulse Oscillator Average power 1 W Pulse duration 200 fs Pulse energy 20 nj Central wavelength 1030 nm Spectral bandwidth 5 nm Beam quality TEM 00 Repetition rate MHz tuning range 10 khz tuning accuracy 100 Hz Gain material Yb doped Dimensions 60 x 20 cm s-pulse Amplifier Average power 8 W Pulse duration ps Pulse Energy 2 mj Central Wavelength 1030 nm Spectral bandwidth 5 nm Beam quality TEM 00 (M<1kHz 2 <1.3) Repetition Rate Hz Gain material Yb:KGW Dimensions 75 x 50 cm Yb:KGW -Ytterbium-doped Potassium-Gadolinium Tungstate crystals <1kHz FHG

13 Laser Performance UV 258 nm Energy 300 µj Pulse Length 0.4 ps Diameter 4mm Shape gaussian Pulse Energy stability 0.3%

14 RF Gun REGAE RF gun 6 MW flattop regime Vacuum & Cooling Vacuum 1 ntorr Gun Temp. stabilization

15 By [T] Magnets Design-Simulations- Fabrication -Measurements Dipole magnet Solenoid Corrector Field 0.25T Field 0.2 T Max. field vs current 0.17 T 5.5 Curren

16 Beam Diagnostics & Control Faraday Cups Beam Profile Spectrometer

17 Fabrication & Procurement Made in CANDLE > 40 Our Partners > 50 AREAL - partners

18 International Cooperation Technical Advisory Training Equipment ДЕЗИ PSI

19 First Beam and commissioning 17:32-20 Dec First Beam 36 pc charge Charge 20 - to 236 pc Energy MeV Time structure ps Energy spread < 1.7% Beam profile (rms) 0.62 mm Emittance ~ 0.5 um Repetition rate 1-20 Hz YAG YAG

20 22 July AREAL Opening State Committee of Science

21 Opening DELTA Laboratory 10 Nov Two-photon Microscopy Station Microfabrication Station Biology Material science Environmental science Photonics, microelectronics, MEMS Polymers, semiconductors, ceramics Micro- and nano-structuring,

22 Period 2um DELTA Applications

23 Laser System New developments

24 Sept High Charge Operation Mode ( WFA) Maintenance and Perfor. upgrade Cathode Position Alignment Laser Spot Alignment Working surface cleaning Electron Gun Resonance tune by cathode position Conditioning for High Power RF Gun Temper. Stabilization upgrade RF System Fine Tune of Power Components Timing Adjust. for better performance HC Operation Mode Max Energy 4.8 MeV Bunch charge 800 pc Energy Spread < 1% Norm emittance ~0.5um 800pC

25 Experimental Stations AREAL-5MeV MicroFa b DELTA Exp-1 Microscop y Exp-2

26 Molecular Physics 2015 Experimental program Genetics Biology Microelectronics Solid State Physics Yerevan State Univ Polytechnic Univ. Yerevan Phys. Inst Inst. Mol. Biology Inst. Phys. Research Inst of Biotechnology CANDLE Institute New materials Microfabrication 2016 Proposals 22 Institutions 16 Scientists 68

27 AREAL Highlights Radiation power [W] 2015 Laser IR DELTA MS MF UV Gun 50 MeV Linac Acc1 Acc2 ALPHA H1 H2 BETA Experimental Stations DELTA Laser driven Microscopy and Microfabrication stations. ALPHA THz Free Electron LASER Wavelength 5-150µm 1E+08 1E+06 1E+04 BETA- Advanced Accel. Concepts 1E z [m] 1E+02

28 Exper. Program -Multiple applications Applied Research Material Science Life Sciences Environmental Science Advanced Concepts High Freq. Structures New accel. methods New Radiation Sources Advanced technique Electron Diffraction Pulse radiolysis Time-resolved exper. AREAL Accel. Technology New diagnostic tools Ultrafast timing& Control New electron sources

29 Radiation power [W] P(l) [a.u.] Highlights ALPHA Station 1 IR Free Electron Laser Energy MeV AREAL FEL Sat. length m Pulse energy mj Power= MW Middle IR FEL 1E+08 1E+06 1E+04 1E+02 1E+00 1E+03 1E+03 1E+03 8E+02 6E+02 4E+02 2E+02 0E z [m] l [mm] Wavelength µm

30 ALPHA Station 2 THz radiation source Helical Undulator Type Helical Period length[cm] 8 K - Parameter Number of periods 31 Number of periods 31 Power Beam parameters Beam Energy [MeV] Bunch duration [fs] Bunch charge [pc] f 2 10THz l mm Power MW

31 BETA Station THz Single Mode Accelerating Structure c / 2ad Impedance Dispersion Curve M. Ivanyan, Phys. Rev STAB 7, (2004) M. Ivanyan et al, Phys. Rev STAB 17, (2014) M. Ivanyan et al, Phys. Rev ST - AB 17, (2014) Wake potentials

32 First experimental results Copper-Germanium two layer parallel plates A=2,3,4 cm d=1mm Power - dbm ~2% Freq- GHz 12.4 GHz

33 Experimental Schedule Vacuum Evaporation New Acceleraing Structure Source of THz radiation Novel Beam Diagnostics a=0.1-1cm, Frequency range 1-5 THz

34 Microbunching in Single mode structure ( Plasma, ICTP) Low energy Energy Modulation Ballistic Microbunching High energy Energy Modulation Dispersion section Microbunching Wake of Gaussian Distribution x x Wake of Rectangular Distribution x Wake of Parabolic Distribution

35 Advanced Accelerator Concepts WFA High Transformer Ratio Multi-Bunch WFA Collinear WFA AREAL Multi-bunch mode 16 bunches Q R>20 FACET (SLAC)-2012 R=7

36 Coupler design TWA & Coupler for 3 GHz structure

37 New Infrastructure Brazing station Vacuum oven vacuum deposition CNC Milling machine

38 mtca installation at AREAL RF System LLRF Diagnostic System BPMs Faraday Cups Software for µtca - installed Initial test is completed Commissioning is foreseen in September

39 Thank You!!!