Turbulence Measurements with the Upgraded Phase Contrast Imaging Diagnostic in Alcator C-Mod

Size: px
Start display at page:

Download "Turbulence Measurements with the Upgraded Phase Contrast Imaging Diagnostic in Alcator C-Mod"

Transcription

1 Turbulence Measurements with the Upgraded Phase Contrast Imaging Diagnostic in L. Lin, M. Porkolab, E. M. Edlund, Y. Lin, S. J. Wukitch Plasma Science and Fusion Center, MIT, Cambridge, MA, th Annual Meeting of the Division of Plasma Physics October 30-November 3, 2006 Philadelphia, Pennsylvania *Work supported by U. S. DOE under DE-FG02-94-ER54235 and DE-FC02-99-ER54512.

2 Outline Phase Contrast Imaging Diagnostic (PCI) in Principle of Phase Contrast Imaging PCI System in Recent Results from PCI System in Localized Measurements along Vertical Chords New Features of QC Modes Observed with the Low-k Setup Possibly Coupled Coherence Turbulence Detected with the Medium-k Setup PCI High k Detecting Capability Test

3 Principle of Phase Contrast Imaging OBJECT: Plasma density fluctuations introduce phase variations to the laser beam. ( ) n = n + ncos k x 0 p Δ 2 iδ E= E 1 + E cos( k x 0 0 p ) 2 2 iδ + E cos k x 0 p 2 Δ= -λ rln 1 I E E E I 0 e * 2 = = 0 0 PLASMA X ( ) IMAGE: Laser phase variations are converted to intensity variations by the phase plate. /2 delay Δ 2 iδ E= ie 1 + E cos k x 0 0 p 2 2 iδ + E exp( k x 0 p ) 2 * I = E E I [1 + 2Δcos(k x)] 0 p IMAGE ( ) Z

4 PCI Geometry

5 PCI System in PCI measures electron density fluctuations along 32 vertical chords. Wave number Range: Localization 0.5cm -1 < k R < 55 cm -1 60cm<R<79cm Frequency Range Laser 2kHz~5MHz 60 Watt CO 2 CW tunable 50 or 80 MHz λ=10.6μm (Heterodyned) TEM 00 A masking phase plate system has been installed to localize short wavelength fluctuations along the laser beam. Optional optics configurations are available for optimizing turbulence measurements in different wavenumber ranges.

6 (I) Localized Measurement along Vertical Chords The vertical localization capability has been demonstrated. An ITG-like turbulence has been measured.

7 Principle of Vertical Localization Cross Section along the Beam R Φ The magnetic pitch angle β=arctan(b R /B Φ ) changes along a vertical chord passing through the plasma. Since the fluctuation wavenumbers are mainly perpendicular to the field lines, they also rotate from the bottom to the top of the plasma as the field pitch angle rotates.

8 This rotation is imaged onto the phase plate used in the PCI system, and by partially masking that phase plate, we can select a vertical region of interest (a) The front view of the conventional phase plate λ 0 /8 thick metal coating -β : Unscattered wave : Scattered wave ZnSe Substrate s k Conventional phase plate, which provides a π/2 phase delay on the unscattered wave. (b) The front view of phase plate and mask Metal Mask θ The combination of the phase plate and mask will select a scattered beam which is parallel to the direction of fluctuation.

9 Spatial Resolution Estimate on Magnetic Pitch Angle β = tan -1 (BR /B Φ) [degree] Vertical Axis z [m]

10 Partially Localized Turbulence Measurement The Bottom Plasma View θ = 15 o

11 The Top Plasma View θ= -15 o The vertical localization capability has been demonstrated The top/bottom Quasi-Coherent (QC) modes have been differentiated by the masked PCI system An ITG-like turbulence has been measured

12 Localization Estimate for Short Wavelength ETG Turbulence Shot: ; θ: 9 deg Shot: ; θ: 4.5 deg B T e ρ k k e θ θ = 3.5 T = T = 1 kev ρ i ~0.002 cm e ~ 0.1 (ETG) ~50 cm -1 k θ ~30 cm ; k ~50 cm -1-1 θ The localizing system will be used together with the high-k setup to search for the short wavelength ETG turbulence in the next campaign.

13 (II) New Features of the Quasi-Coherent (QC) Modes Observed with the Low-k Setup PCI As we increase distance of X-point from the PCI chords, we observe the following: 1. The normalized intensity of the QC modes is reduced toward the X-point. 2. The spatial location of this intensity reduction moves with the X-point. 3. A new turbulence spectrum localized toward the X-point.

14 PCI Measurements with Different X-point Locations R x-point = 55.9 cm PCI QC Modes New Turbulence Δ ~6cm

15 R x-point = 53.9 cm PCI Increasing Distance of X-Point from PCI Chords QC Modes New Turbulence Δ ~8cm

16 PCI Measurements Increasing Distance at R of x-point = X-Point 52.1 cm from PCI Chords R x-point = 52.1 cm PCI QC Modes Δ ~10cm

17 PCI Spectrograms with Different X-point Locations P i ( f ) Max P ( f ) i 295 khz 55 khz R x-point = 55.9 cm R x-point = 53.9 cm R x-point = 52.1 cm Δ ~6cm Δ ~8cm Δ ~10cm Increasing Distance of X-Point from PCI Chords The QC modes appear on more PCI chords.

18 The normalized intensity of the QC modes is reduced toward the X-point. Furthermore, the spatial location of this reduction moves with the X-point. Normalized QC Intensity f f 1 2 P ( f ) df ( f f ) ( f1) + ( f2) [, ] P P 2 f f f QC R 0

19 The expanded beam enables the PCI system to investigate the spatial k R structure of the low-k turbulence. k R of the QC modes increases toward HFS. R 0

20 Summary (II) The normalized intensity of the QC modes is reduced toward HFS. The spatial location of this intensity reduction along the major radius moves with the X-point. k R of the QC modes increases toward HFS. A new turbulence spectrum localized toward the X-point has been observed. - It moves with the X-point; its k R could not be determined yet.

21 (III) Coupled Modes Detected with the Medium-k (12 cm -1 ) Setup PCI Three coupled (f 3 ~f 2 +f 1 and k R3 ~k R2 +k R1 ) semi-coherent modes Second harmonic of the Quasi-Coherent (QC) modes

22 Plasma Overview WkJ [ ] 20-2 ndl e [10 m ] D α [a.u.] P RF[MW] Time [sec]

23 PCI Measurements Frequency vs. Time Mode 3 f 3 ~ 610 khz Mode 2 (TAE-like) f 2 ~ 535 khz Mode 4 (2 nd harmonic of QC) f 4 ~ 150 khz Mode 1 (QC) f 1 ~ 75 khz

24 Wavenumber vs. Frequency Shot: , Time: sec 2 3 Coupled Modes: f ~ f + f k ~ k + k R3 R1 R nd harmonic: k f ~ ~ 2 f k R4 R1

25 Wavenumber Spectra Mode 1 f [ 70, 90 ] khz Mode 2 f [ ] 525,545 khz Mode 3 f [ ] 605,625 khz Mode 4 [ ] f 145,165 khz

26 P( k) = P + Aexp Mode 1 Mode 2 Mode 3 GuassAmp Fit: ( k k ) 2 c f [khz] [ 70, 90] [525,545] [605,625] 0 2 2k w P 0 [a. u.] k c [cm -1 ] k w [cm -1 ] A [a. u.] Three Coupled Modes: f3 ~ f1 + f2 k ~ k + k R3 R1 R2 Mode 1 Mode 4 f [khz] [ 70, 90] [145,165] P 0 [a. u.] k c [cm -1 ] k w [cm -1 ] A [a. u.] nd harmonic: k f ~ ~ 2 f k R4 R1

27 (IV) PCI high k detecting capability has been tested recently with sound waves in air. The PCI wavenumber detection capability has been tested up to 55 cm -1. A system composed of four transducers at frequencies of 30, 75, 125 and 200 khz has been built, absolute calibration is under way. The high-k setup will be tried with plasmas in the next campaign.

28 PCI System Test with 75 KHz Sound Wave The strong peaks corresponds to the sound wave at k = 14 cm -1, f =75 khz and its harmonics.

29 Wavenumber Spectrum P(k) Normalized Wavenumber Spectrum P(k)/ P(k)dk 1 st 1 st 2 nd 3 rd 2 nd 4 th 3 rd 4 th

30 PCI System Test with 200 KHz Sound Wave The strong peak corresponds to the sound wave at k = 37 cm -1 f =200 khz.

31 References 1. L. Lin et al., Rev. Sci. Instrum. 77, 10E918 (2006). 2. M. Porkolab et al., IEEE Trans. Plasma Sci., 34, 229 (2006). 3. S. Kado et al., Jpn. J. Appl. Phys. 34, 6492 (1995). 4. P. Devynck et al., Plasma Phys. Control. Fusion, 35, 63, (1993). 5. E. Nelson-Melby et al., Phys. Rev. Letts. 90, (2003). 6. N. Basse et al., Phys. Plasmas 12, (2005). 7. S. Coda, PhD Dissertation, MIT, Dept. of Physics, A. Mazurenko, PhD Dissertation, MIT, Dept. of Physics, E. Nelson-Melby, PhD Dissertation, MIT, Dept. of Physics, 2001.

32 Sign-up

Studies of Turbulence and Transport in Alcator C- Mod H-Mode Plasmas with Phase Contrast Imaging and Comparisons with GYRO*

Studies of Turbulence and Transport in Alcator C- Mod H-Mode Plasmas with Phase Contrast Imaging and Comparisons with GYRO* Studies of Turbulence and Transport in C- Mod H-Mode Plasmas with Phase Contrast Imaging and Comparisons with GYRO* M. Porkolab 1, L. Lin 1, E.M. Edlund 1, J.C. Rost 1, C.L. Fiore 1, M. Greenwald 1, Y.

More information

Study of Enhanced D α H-modes Using the Alcator C-Mod Reflectometer

Study of Enhanced D α H-modes Using the Alcator C-Mod Reflectometer Study of Enhanced D α H-modes Using the Reflectometer Y. Lin 1, J.H. Irby, E.S. Marmar, R. Nazikian, M. Greenwald, A.E. Hubbard, J. Hughes, I.H. Hutchinson, B. LaBombard, A. Mazurenko, E. Nelson-Melby,

More information

Active and Fast Particle Driven Alfvén Eigenmodes in Alcator C-Mod

Active and Fast Particle Driven Alfvén Eigenmodes in Alcator C-Mod Active and Fast Particle Driven Alfvén Eigenmodes in Alcator C-Mod JUST DID IT. J A Snipes, N Basse, C Boswell, E Edlund, A Fasoli #, N N Gorelenkov, R S Granetz, L Lin, Y Lin, R Parker, M Porkolab, J

More information

ICRF Mode Conversion Flow Drive on Alcator C-Mod and Projections to Other Tokamaks

ICRF Mode Conversion Flow Drive on Alcator C-Mod and Projections to Other Tokamaks ICRF Mode Conversion Flow Drive on Alcator C-Mod and Projections to Other Tokamaks Y. Lin, J.E. Rice, S.J. Wukitch, M.J. Greenwald, A.E. Hubbard, A. Ince- Cushman, L. Lin, E.S. Marmar, M. Porkolab, M.L.

More information

PSFC/JA D.R. Ernst, N. Basse, W. Dorland 1, C.L. Fiore, L. Lin, A. Long 2, M. Porkolab, K. Zeller, K. Zhurovich. June 2006

PSFC/JA D.R. Ernst, N. Basse, W. Dorland 1, C.L. Fiore, L. Lin, A. Long 2, M. Porkolab, K. Zeller, K. Zhurovich. June 2006 PSFC/JA-6-34 Identification of TEM Turbulence through Direct Comparison of Nonlinear Gyrokinetic Simulations with Phase Contrast Imaging Density Fluctuation Measurements D.R. Ernst, N. Basse, W. Dorland

More information

Data analysis and effect corrections of Phase Contrast Imaging diagnostic on HL-2A tokamak

Data analysis and effect corrections of Phase Contrast Imaging diagnostic on HL-2A tokamak SWIP 核工业西南物理研究院 Southwestern Institute of Physics, China Data analysis and effect corrections of Phase Contrast Imaging diagnostic on HL-2A tokamak Y.Yu 1,S.B.Gong 1,2, M.Xu 2,C.J.Xiao 3, W.Jiang 1,W.L.Zhong

More information

ITB Transport Studies in Alcator C-Mod. Catherine Fiore MIT Plasma Science and Fusion Center Transport Task Force March 26th Boulder, Co

ITB Transport Studies in Alcator C-Mod. Catherine Fiore MIT Plasma Science and Fusion Center Transport Task Force March 26th Boulder, Co Transport Studies in Alcator C-Mod Catherine Fiore MIT Plasma Science and Fusion Center Transport Task Force March 26th Boulder, Co With Contributions from: I. Bespamyatnov, P. T. Bonoli*, D. Ernst*, M.

More information

Characterization of core and edge turbulence in L- and enhanced D α H-mode Alcator C-Mod plasmas

Characterization of core and edge turbulence in L- and enhanced D α H-mode Alcator C-Mod plasmas PSFC/JA-05-6 Characterization of core and edge turbulence in L- and enhanced D α H-mode Alcator C-Mod plasmas Basse, N.P., Edlund, E.M., Ernst, D.R., Fiore, C.L., Greenwald, M.J., Hubbard, A.E., Hughes,

More information

Plasma Science and Fusion Center

Plasma Science and Fusion Center Plasma Science and Fusion Center Turbulence and transport studies in ALCATOR C Mod using Phase Contrast Imaging (PCI) Diagnos@cs and Comparison with TRANSP and Nonlinear Global GYRO Miklos Porkolab (in

More information

Plasma Fusion Center Massachusetts Institute of Technology Cambridge, MA Burrell, K.H. General Atomics PO Box San Diego, CA

Plasma Fusion Center Massachusetts Institute of Technology Cambridge, MA Burrell, K.H. General Atomics PO Box San Diego, CA PFC/JA-95-28 Edge Turbulence Measurements during the L- to H-Mode Transition by Phase Contrast Imaging on DIII-Dt Coda, S.; Porkolab, M.; Plasma Fusion Center Massachusetts Institute of Technology Cambridge,

More information

Reduction of Turbulence and Transport in the Alcator C-Mod Tokamak by Dilution of Deuterium Ions with Nitrogen and Neon Injection

Reduction of Turbulence and Transport in the Alcator C-Mod Tokamak by Dilution of Deuterium Ions with Nitrogen and Neon Injection Reduction of Turbulence and Transport in the Alcator C-Mod Tokamak by Dilution of Deuterium Ions with Nitrogen and Neon Injection M. Porkolab, P. C. Ennever, S. G. Baek, E. M. Edlund, J. Hughes, J. E.

More information

Recent improvement of the LHD Thomson scattering system

Recent improvement of the LHD Thomson scattering system Recent improvement of the LHD Thomson scattering system 1 National Institute for Fusion Science Oroshi 322-6, Toki, Gifu 509-5292, Japan E-mail: yamadai@lhd.nifs.ac.jp H. Funaba, R. Yasuhara, K. Narihara,

More information

Studies of turbulence and transport in Alcator C-Mod H-Mode plasmas with phase contrast imaging and comparisons with GYRO

Studies of turbulence and transport in Alcator C-Mod H-Mode plasmas with phase contrast imaging and comparisons with GYRO PSFC/JA-08-46 Studies of turbulence and transport in Alcator C-Mod H-Mode plasmas with phase contrast imaging and comparisons with GYRO L. Lin 1, M. Porkolab 1, E.M. Edlund 1, C. Fiore 1, M. Greenwald

More information

Phase ramping and modulation of reflectometer signals

Phase ramping and modulation of reflectometer signals 4th Intl. Reflectometry Workshop - IRW4, Cadarache, March 22nd - 24th 1999 1 Phase ramping and modulation of reflectometer signals G.D.Conway, D.V.Bartlett, P.E.Stott JET Joint Undertaking, Abingdon, Oxon,

More information

Validation Study of gyrokinetic simulation (GYRO) near the edge in Alcator C-Mod ohmic discharges

Validation Study of gyrokinetic simulation (GYRO) near the edge in Alcator C-Mod ohmic discharges Validation Study of gyrokinetic simulation (GYRO) near the edge in Alcator C-Mod ohmic discharges C. Sung, A. E. White, N. T. Howard, D. Mikkelsen, C. Holland, J. Rice, M. Reinke, C. Gao, P. Ennever, M.

More information

Pedestals and Fluctuations in C-Mod Enhanced D α H-modes

Pedestals and Fluctuations in C-Mod Enhanced D α H-modes Pedestals and Fluctuations in Enhanced D α H-modes Presented by A.E.Hubbard With Contributions from R.L. Boivin, B.A. Carreras 1, S. Gangadhara, R. Granetz, M. Greenwald, J. Hughes, I. Hutchinson, J. Irby,

More information

X-Ray Measurements of the Levitated Dipole Experiment

X-Ray Measurements of the Levitated Dipole Experiment X-Ray Measurements of the Levitated Dipole Experiment J. L. Ellsworth, J. Kesner, MIT Plasma Science and Fusion Center, D.T. Garnier, A.K. Hansen, M.E. Mauel, Columbia University, S. Zweben, Princeton

More information

C-Mod Transport Program

C-Mod Transport Program C-Mod Transport Program PAC 2006 Presented by Martin Greenwald MIT Plasma Science & Fusion Center 1/26/2006 Introduction Programmatic Focus Transport is a broad topic so where do we focus? Where C-Mod

More information

Studies of Turbulence and Transport in Alcator C-Mod Ohmic Plasmas with Phase Contrast Imaging and Comparisons with GYRO*

Studies of Turbulence and Transport in Alcator C-Mod Ohmic Plasmas with Phase Contrast Imaging and Comparisons with GYRO* Studis of Turbulnc and Transport in Ohmic Plasmas with Phas Contrast Imaging and Comparisons with GYRO* L. Lin 1, M. Porkolab 1, E.M. Edlund 1, J.C. Rost 1, M. Grnwald 1, D.R. Mikklsn 2, N. Tsujii 1 1

More information

Measurements of rotational transform due to noninductive toroidal current using motional Stark effect spectroscopy in the Large Helical Device

Measurements of rotational transform due to noninductive toroidal current using motional Stark effect spectroscopy in the Large Helical Device REVIEW OF SCIENTIFIC INSTRUMENTS 76, 053505 2005 Measurements of rotational transform due to noninductive toroidal current using motional Stark effect spectroscopy in the Large Helical Device K. Ida, a

More information

Characterization of neo-classical tearing modes in high-performance I- mode plasmas with ICRF mode conversion flow drive on Alcator C-Mod

Characterization of neo-classical tearing modes in high-performance I- mode plasmas with ICRF mode conversion flow drive on Alcator C-Mod 1 EX/P4-22 Characterization of neo-classical tearing modes in high-performance I- mode plasmas with ICRF mode conversion flow drive on Alcator C-Mod Y. Lin, R.S. Granetz, A.E. Hubbard, M.L. Reinke, J.E.

More information

Connections between Particle Transport and Turbulence Structures in the Edge and SOL of Alcator C-Mod

Connections between Particle Transport and Turbulence Structures in the Edge and SOL of Alcator C-Mod Connections between Particle Transport and Turbulence Structures in the Edge and SOL of Alcator C-Mod I. Cziegler J.L. Terry, B. LaBombard, J.W. Hughes MIT - Plasma Science and Fusion Center th 19 Plasma

More information

Validation of spectral MSE for Alcator C-Mod and for ITER

Validation of spectral MSE for Alcator C-Mod and for ITER Validation of spectral MSE for Alcator C-Mod and for ITER K.T. Liao 1, W.L. Rowan 1, R.T. Mumgaard 2, Bob Granetz 2, Steve Scott 3, Fred Levinton 4, Howard Yuh 4, O. Marchuk 5, Y. Ralchenko 6 1 The University

More information

Turbulence and transport reduction with innovative plasma shapes in TCV - correlation ECE measurements and gyrokinetic simulations

Turbulence and transport reduction with innovative plasma shapes in TCV - correlation ECE measurements and gyrokinetic simulations Turbulence and transport reduction with innovative plasma shapes in TCV - correlation ECE measurements and gyrokinetic simulations A. Pochelon, and the TCV team 1 Ecole Polytechnique de Lausanne (EPFL)

More information

ICRF Mode Conversion Flow Drive on the Alcator C Mod Tokamak

ICRF Mode Conversion Flow Drive on the Alcator C Mod Tokamak 23 rd IAEA Fusion Energy Conference, EXW/4 1 ICRF Mode Conversion Flow Drive on the Alcator C Mod Tokamak Yijun Lin, J.E. Rice, S.J. Wukitch, M.L. Reinke, M. Greenwald, A. E. Hubbard, E.S. Marmar, Y. Podpaly,

More information

Study of B +1, B +4 and B +5 impurity poloidal rotation in Alcator C-Mod plasmas for 0.75 ρ 1.0.

Study of B +1, B +4 and B +5 impurity poloidal rotation in Alcator C-Mod plasmas for 0.75 ρ 1.0. Study of B +1, B +4 and B +5 impurity poloidal rotation in Alcator C-Mod plasmas for 0.75 ρ 1.0. Igor Bespamyatnov, William Rowan, Ronald Bravenec, and Kenneth Gentle The University of Texas at Austin,

More information

Variation of Turbulence and Transport with the Te/Ti Ratio in H-Mode Plasmas

Variation of Turbulence and Transport with the Te/Ti Ratio in H-Mode Plasmas Variation of Turbulence and Transport with the Te/Ti Ratio in H-Mode Plasmas by G.R. McKee with C.H. Holland, C.C. Petty, H. Reimerdes,5, T.R. Rhodes6,L. Schmitz6, S. Smith, I.U. Uzun-Kaymak, G. Wang6,

More information

Ion-Acoustic-Wave Instability from Laser-Driven Return Currents

Ion-Acoustic-Wave Instability from Laser-Driven Return Currents Ion-Acoustic-Wave Instability from Laser-Driven Return Currents 3.0 3~ beam 2.5 4~ TS beam 60 100 100-nm TS volume Thomsonscattered light 5 0 5 Wavelength shift (Å) 0.5 0.0 D. H. Froula University of Rochester

More information

SUMMARY OF EXPERIMENTAL CORE TURBULENCE CHARACTERISTICS IN OH AND ECRH T-10 TOKAMAK PLASMAS

SUMMARY OF EXPERIMENTAL CORE TURBULENCE CHARACTERISTICS IN OH AND ECRH T-10 TOKAMAK PLASMAS SUMMARY OF EXPERIMENTAL CORE TURBULENCE CHARACTERISTICS IN OH AND ECRH T-1 TOKAMAK PLASMAS V. Vershkov, L.G. Eliseev, S.A. Grashin. A.V. Melnikov, D.A. Shelukhin, S.V. Soldatov, A.O. Urazbaev and T-1 team

More information

Development of Polarization Interferometer Based on Fourier Transform Spectroscopy for Thomson Scattering Diagnostics

Development of Polarization Interferometer Based on Fourier Transform Spectroscopy for Thomson Scattering Diagnostics 16th International Toki Conference Advanced Imaging and Plasma Diagnostics Ceratopia Toki, Gifu, JAPAN December 5-8, 2006 Development of Polarization Interferometer Based on Fourier Transform Spectroscopy

More information

Effect of ECRH Regime on Characteristics of Short-Wave Turbulence in Plasma of the L-2M Stellarator

Effect of ECRH Regime on Characteristics of Short-Wave Turbulence in Plasma of the L-2M Stellarator 1 Effect of ECRH Regime on Characteristics of Short-Wave Turbulence in Plasma of the L-2M Stellarator N.N. Skvortsova, D.K. Akulina, G.M. Batanov, G.S. Voronov, L.V. Kolik, L.M. Kovrizhnykh, A.A. Letunov,

More information

Microwave Reflectometry in TJ-II

Microwave Reflectometry in TJ-II Microwave Reflectometry in TJ-II E. Blanco, T. Estrada, L. Cupido*, M.E. Manso*, V. Zhuravlev** and J. Sánchez Laboratorio Nacional de Fusión, Asociación Euratom-CIEMAT, Madrid, Spain Abstract *Associação

More information

Observations of Rotation Reversal and Fluctuation Hysteresis in Alcator C-Mod Plasmas

Observations of Rotation Reversal and Fluctuation Hysteresis in Alcator C-Mod Plasmas Observations of Rotation Reversal and Fluctuation Hysteresis in Alcator C-Mod Plasmas N.M. Cao 1, J.E. Rice 1, A.E. White 1, S.G. Baek 1, M.A. Chilenski 1, P.H. Diamond 2, A.E. Hubbard 1, J.W. Hughes 1,

More information

4 FEL Physics. Technical Synopsis

4 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 information

The MIT accelerator: A fusion product source for ICF diagnostics development and education

The MIT accelerator: A fusion product source for ICF diagnostics development and education The MIT accelerator: A fusion product source for ICF diagnostics development and education Johan Frenje MIT - Plasma Science and Fusion Center 47 th Annual Meeting of the Division of Plasma Physics Denver,

More information

Studies of Lower Hybrid Range of Frequencies Actuators in the ARC Device

Studies of Lower Hybrid Range of Frequencies Actuators in the ARC Device Studies of Lower Hybrid Range of Frequencies Actuators in the ARC Device P. T. Bonoli, Y. Lin. S. Shiraiwa, G. M. Wallace, J. C. Wright, and S. J. Wukitch MIT PSFC, Cambridge, MA 02139 59th Annual Meeting

More information

ICRF Induced Argon Pumpout in H-D Plasmas in Alcator C-Mod

ICRF Induced Argon Pumpout in H-D Plasmas in Alcator C-Mod ICRF Induced Argon Pumpout in H-D Plasmas in Alcator C-Mod C. Gao, J.E. Rice, M.L. Reinke, Y. Lin, S.J. Wukitch, L. Delgado-Aparicio, E.S. Marmar, and Alcator C-Mod Team MIT-PSFC, University of York, Princeton

More information

GA A27933 TURBULENCE BEHAVIOR AND TRANSPORT RESPONSE APPROACHING BURNING PLASMA RELEVANT PARAMETERS

GA A27933 TURBULENCE BEHAVIOR AND TRANSPORT RESPONSE APPROACHING BURNING PLASMA RELEVANT PARAMETERS GA A27933 TURBULENCE BEHAVIOR AND TRANSPORT RESPONSE APPROACHING by G.R. McKEE, C. HOLLAND, Z. YAN, E.J. DOYLE, T.C. LUCE, A. MARINONI, C.C. PETTY, T.L. RHODES, J.C. ROST, L. SCHMITZ, W.M. SOLOMON, B.J.

More information

Fluctuation Suppression during the ECH Induced Potential Formation in the Tandem Mirror GAMMA 10

Fluctuation Suppression during the ECH Induced Potential Formation in the Tandem Mirror GAMMA 10 EXC/P8-2 Fluctuation Suppression during the ECH Induced Potential Formation in the Tandem Mirror GAMMA M. Yoshikawa ), Y. Miyata ), M. Mizuguchi ), Y. Oono ), F. Yaguchi ), M. Ichimura ), T. Imai ), T.

More information

Abstract. Department of Physics. University of Wisconsin UCLA UCLA

Abstract. Department of Physics. University of Wisconsin UCLA UCLA Abstract Internal magnetic field fluctuations and equilibrium poloidal magnetic field have been measured in the MST reversal field pinch by a 11 chord far-infrared polarimeterinterferometer system with

More information

A Study of Directly Launched Ion Bernstein Waves in a Tokamak

A Study of Directly Launched Ion Bernstein Waves in a Tokamak PFC-/JA-86-6 A Study of Directly Launched Ion Bernstein Waves in a Tokamak Y. Takase, J. D. Moody, C. L. Fiore, F. S. McDermott, M. Porkolab, and J. Squire Plasma Fusion Center Massachusetts Institute

More information

L-to-H power threshold comparisons between NBI and RF heated plasmas in NSTX

L-to-H power threshold comparisons between NBI and RF heated plasmas in NSTX Research Supported by L-to-H power threshold comparisons between NBI and RF heated plasmas in NSTX T.M. Biewer 1, R. Maingi 1, H. Meyer 2, R.E. Bell 3, C. Bush 1, S. Kaye 3, S. Kubota 3, B. LeBlanc 3,

More information

Comparison of Ion Internal Transport Barrier Formation between Hydrogen and Helium Dominated Plasmas )

Comparison of Ion Internal Transport Barrier Formation between Hydrogen and Helium Dominated Plasmas ) Comparison of Ion Internal Transport Barrier Formation between Hydrogen and Helium Dominated Plasmas ) Kenichi NAGAOKA 1,2), Hiromi TAKAHASHI 1,2), Kenji TANAKA 1), Masaki OSAKABE 1,2), Sadayoshi MURAKAMI

More information

ICRF Loading Studies on Alcator C-Mod

ICRF Loading Studies on Alcator C-Mod ICRF Loading Studies on Alcator C-Mod 46 th Annual Meeting of the APS Division of Plasma Physics November 15-19, 19, 2004 A. Parisot, S.J. S.J. Wukitch,, P. Bonoli,, J.W. Hughes, B. Labombard,, Y. Lin,

More information

Measuring the Refractive Index of a Laser-Plasma System

Measuring the Refractive Index of a Laser-Plasma System Measuring the Refractive Index of a Laser-Plasma System 1 dh ( 10 4 ) 0 1 J (dh) R (dh) 3 2 1 0 1 2 3 D. Turnbull University of Rochester Laboratory for Laser Energetics Dm (Å) 58th Annual Meeting of the

More information

OVERVIEW OF THE ALCATOR C-MOD PROGRAM. IAEA-FEC November, 2004 Alcator Team Presented by Martin Greenwald MIT Plasma Science & Fusion Center

OVERVIEW OF THE ALCATOR C-MOD PROGRAM. IAEA-FEC November, 2004 Alcator Team Presented by Martin Greenwald MIT Plasma Science & Fusion Center OVERVIEW OF THE ALCATOR C-MOD PROGRAM IAEA-FEC November, 2004 Alcator Team Presented by Martin Greenwald MIT Plasma Science & Fusion Center OUTLINE C-Mod is compact, high field, high density, high power

More information

Progress of Confinement Physics Study in Compact Helical System

Progress of Confinement Physics Study in Compact Helical System 1st IAEA Fusion Energy Conference Chengdu, China, 16-1 October, 6 IAEA-CN-149/ EX/5-5Rb Progress of Confinement Physics Study in Compact Helical System S. Okamura et al. NIFS-839 Oct. 6 1 EX/5-5Rb Progress

More information

Neutral Beam-Ion Prompt Loss Induced by Alfvén Eigenmodes in DIII-D

Neutral Beam-Ion Prompt Loss Induced by Alfvén Eigenmodes in DIII-D Neutral Beam-Ion Prompt Loss Induced by Alfvén Eigenmodes in DIII-D by X. Chen,1 M.E. Austin,2 R.K. Fisher,3 W.W. Heidbrink,1 G.J. Kramer,4 R. Nazikian,4 D.C. Pace,3 C.C. Petty,3 M.A. Van Zeeland3 1University

More information

DIAGNOSTICS FOR ADVANCED TOKAMAK RESEARCH

DIAGNOSTICS FOR ADVANCED TOKAMAK RESEARCH DIAGNOSTICS FOR ADVANCED TOKAMAK RESEARCH by K.H. Burrell Presented at High Temperature Plasma Diagnostics 2 Conference Tucson, Arizona June 19 22, 2 134 /KHB/wj ROLE OF DIAGNOSTICS IN ADVANCED TOKAMAK

More information

Measurement of lower hybrid waves using microwave scattering technique in Alcator C-Mod

Measurement of lower hybrid waves using microwave scattering technique in Alcator C-Mod Measurement of lower hybrid waves using microwave scattering technique in Alcator C-Mod S. Baek, R. Parker, S. Shiraiwa, A. Dominguez, E. Marmar, G. Wallace, G. J. Kramer* Plasma Science and Fusion Center,

More information

Observation of Reduced Core Electron Temperature Fluctuations and Intermediate Wavenumber Density Fluctuations in H- and QH-mode Plasmas

Observation of Reduced Core Electron Temperature Fluctuations and Intermediate Wavenumber Density Fluctuations in H- and QH-mode Plasmas Observation of Reduced Core Electron Temperature Fluctuations and Intermediate Wavenumber Density Fluctuations in H- and QH-mode Plasmas EX/P5-35 L. Schmitz 1), A.E. White 1), G. Wang 1), J.C. DeBoo 2),

More information

Studies of H Mode Plasmas Produced Directly by Pellet Injection in DIII D

Studies of H Mode Plasmas Produced Directly by Pellet Injection in DIII D Studies of H Mode Plasmas Produced Directly by Pellet Injection in by P. Gohil in collaboration with L.R. Baylor,* K.H. Burrell, T.C. Jernigan,* G.R. McKee, *Oak Ridge National Laboratory University of

More information

SPECTRUM AND PROPAGATION OF LOWER HYBRID WAVES IN THE ALCATOR C TOKAMAK

SPECTRUM AND PROPAGATION OF LOWER HYBRID WAVES IN THE ALCATOR C TOKAMAK PFC/JA-84-6 PECTRUM AND PROPAGATION OF LOWER HYBRID WAVE IN THE ALCATOR C TOKAMAK R. L. Watterson, Y. Takase, P. T. Bonoli, M. Porkolab Plasma Fusion Center Massachusetts Institute of Technology Cambridge,

More information

Faraday Effect Measurement of Internal Magnetic Field and Fluctuations in C-MOD

Faraday Effect Measurement of Internal Magnetic Field and Fluctuations in C-MOD Faraday Effect Measurement of Internal Magnetic Field and Fluctuations in C-MOD William F. Bergerson 1 Coauthors: P. Xu 2, J. H. Irby 2, D. L. Brower 1, W. X. Ding 1, E. S. Marmar 2 1 University of California

More information

Differential Interferometry for Measurement of Density Fluctuations and Fluctuation Induced Transport

Differential Interferometry for Measurement of Density Fluctuations and Fluctuation Induced Transport Differential Interferometry for Measurement of Density Fluctuations and Fluctuation Induced Transport Liang Lin University of California, Los Angeles, California, USA in collaboration with W. X. Ding,

More information

Measurements of Core Electron Temperature Fluctuations in DIII-D with Comparisons to Density Fluctuations and Nonlinear GYRO Simulations

Measurements of Core Electron Temperature Fluctuations in DIII-D with Comparisons to Density Fluctuations and Nonlinear GYRO Simulations Measurements of Core Electron Temperature Fluctuations in DIII-D with Comparisons to Density Fluctuations and Nonlinear GYRO Simulations A.E. White,a) L. Schmitz,a) G.R. McKee,b) C. Holland,c) W.A. Peebles,a)

More information

Mechanisms for ITB Formation and Control in Alcator C-Mod Identified through Gyrokinetic Simulations of TEM Turbulence

Mechanisms for ITB Formation and Control in Alcator C-Mod Identified through Gyrokinetic Simulations of TEM Turbulence th IAEA Fusion Energy Conference Vilamoura, Portugal, 1-6 November IAEA-CN-116/TH/-1 Mechanisms for ITB Formation and Control in Alcator C-Mod Identified through Gyrokinetic Simulations of TEM Turbulence

More information

GA A27806 TURBULENCE BEHAVIOR AND TRANSPORT RESPONSE APPROACHING BURNING PLASMA RELEVANT PARAMETERS

GA A27806 TURBULENCE BEHAVIOR AND TRANSPORT RESPONSE APPROACHING BURNING PLASMA RELEVANT PARAMETERS GA A27806 TURBULENCE BEHAVIOR AND TRANSPORT RESPONSE APPROACHING by G.R. McKEE, C. HOLLAND, Z. YAN, E.J. DOYLE, T.C. LUCE, A. MARINONI, C.C. PETTY, T.L. RHODES, L. SCHMITZ, W.M. SOLOMON, B.J. TOBIAS, G.

More information

Observations of the collapse of asymmetrically driven convergent shocks. 26 June 2009

Observations of the collapse of asymmetrically driven convergent shocks. 26 June 2009 PSFC/JA-8-8 Observations of the collapse of asymmetrically driven convergent shocks J. R. Rygg, J. A. Frenje, C. K. Li, F. H. Seguin, R. D. Petrasso, F.J. Marshalli, J. A. Delettrez, J.P. Knauer, D.D.

More information

The Instrumental Function of the X-ray Imaging Crystal Spectrometer on Alcator C-Mod

The Instrumental Function of the X-ray Imaging Crystal Spectrometer on Alcator C-Mod The Instrumental Function of the X-ray Imaging Crystal Spectrometer on Alcator C-Mod M. Bitter, K. W. Hill, B. Stratton, S. Scott Princeton Plasma Physics Laboratory, Princeton, NJ, USA A. Ince-Cushman,

More information

Density Peaking At Low Collisionality on Alcator C-Mod

Density Peaking At Low Collisionality on Alcator C-Mod Density Peaking At Low Collisionality on Alcator C-Mod APS-DPP Meeting Philadelphia, 10/31/2006 M. Greenwald, D. Ernst, A. Hubbard, J.W. Hughes, Y. Lin, J. Terry, S. Wukitch, K. Zhurovich, Alcator Group

More information

Gyrokine.c Analysis of the Linear Ohmic Confinement Regime in Alcator C- Mod *

Gyrokine.c Analysis of the Linear Ohmic Confinement Regime in Alcator C- Mod * Gyrokine.c Analysis of the Linear Ohmic Confinement Regime in Alcator C- Mod * Miklos Porkolab in collabora.on with J. Dorris, P. Ennever, D. Ernst, C. Fiore, M. Greenwald, A. Hubbard, E. Marmar, Y. Ma,

More information

TURBULENT TRANSPORT THEORY

TURBULENT TRANSPORT THEORY ASDEX Upgrade Max-Planck-Institut für Plasmaphysik TURBULENT TRANSPORT THEORY C. Angioni GYRO, J. Candy and R.E. Waltz, GA The problem of Transport Transport is the physics subject which studies the physical

More information

Excitation of Alfvén eigenmodes with sub-alfvénic neutral beam ions in JET and DIII-D plasmas

Excitation of Alfvén eigenmodes with sub-alfvénic neutral beam ions in JET and DIII-D plasmas Excitation of Alfvén eigenmodes with sub-alfvénic neutral beam ions in JET and DIII-D plasmas D. Borba 1,9, R. Nazikian 2, B. Alper 3, H.L. Berk 4, A. Boboc 3, R.V. Budny 2, K.H. Burrell 5, M. De Baar

More information

Understanding Turbulence is a Grand Challenge

Understanding Turbulence is a Grand Challenge The Turbulent Structure of a Plasma Confined by a Magnetic Dipole B. A. Grierson M.W. Worstell, M.E. Mauel ICC 28 Reno, NV 1 Understanding Turbulence is a Grand Challenge Ubiquitous in natural and laboratory

More information

Development of a dispersion interferometer for magnetic confinement plasma and its application to atmospheric pressure plasmas

Development of a dispersion interferometer for magnetic confinement plasma and its application to atmospheric pressure plasmas Development of a dispersion interferometer for magnetic confinement plasma and its application to atmospheric pressure plasmas T. Akiyama 1, a, R. Yasuhara a, K. Kawahata a, K. Nakayama b, S. Okajima b,

More information

Laser heating of noble gas droplet sprays: EUV source efficiency considerations

Laser heating of noble gas droplet sprays: EUV source efficiency considerations Laser heating of noble gas droplet sprays: EUV source efficiency considerations S.J. McNaught, J. Fan, E. Parra and H.M. Milchberg Institute for Physical Science and Technology University of Maryland College

More information

Calculating Thin Film Stack Properties

Calculating Thin Film Stack Properties Lecture 5: Thin Films Outline 1 Thin Films 2 Calculating Thin Film Stack Properties 3 Fabry-Perot Tunable Filter 4 Anti-Reflection Coatings 5 Interference Filters Christoph U. Keller, Leiden University,

More information

Plasma Science and Fusion Center Massachusetts Institute of Technology Cambridge, MA USA

Plasma Science and Fusion Center Massachusetts Institute of Technology Cambridge, MA USA PSFC/JA-7-53 The effect of electron cyclotron heating on density fluctuations at ion and electron scales in ITER baseline scenario discharges on the DIII-D tokamak A. Marinoni, R.I. Pinsker, M. Porkolab,

More information

INTERFEROMETER SYSTEMS ON LHD

INTERFEROMETER SYSTEMS ON LHD INTERFEROMETER SYSTEMS ON LHD T. AKIYAMA, a * K. KAWAHATA, a K. TANAKA, a T. TOKUZAWA, a Y. ITO, a S. OKAJIMA, b K. NAKAYAMA, b C. A. MICHAEL, c L. N. VYACHESLAVOV, d A. SANIN, d S. TSUJI-IIO, e and LHD

More information

Reduced Electron Thermal Transport in Low Collisionality H-mode Plasmas in DIII-D and the Importance of Small-scale Turbulence

Reduced Electron Thermal Transport in Low Collisionality H-mode Plasmas in DIII-D and the Importance of Small-scale Turbulence 1 Reduced Electron Thermal Transport in Low Collisionality H-mode Plasmas in DIII-D and the Importance of Small-scale Turbulence L. Schmitz, 1 C. Holland, 2 T.L. Rhodes, 1 G. Wang, 1 L. Zeng, 1 A.E. White,

More information

Two-color interferometry as a fluctuation diagnostic on Alcator C-Mod

Two-color interferometry as a fluctuation diagnostic on Alcator C-Mod PSFC/RR-13-2 DOE/ET-54512-382 Two-color interferometry as a fluctuation diagnostic on Alcator C-Mod Kasten, C.P. June, 2013 Plasma Science and Fusion Center Massachusetts Institute of Technology Cambridge

More information

Recent results from lower hybrid current drive experiments on Alcator C-Mod

Recent results from lower hybrid current drive experiments on Alcator C-Mod Recent results from lower hybrid current drive experiments on Alcator C-Mod R. R. Parker, S.-G. Baek, C. Lau, Y. Ma, O. Meneghini, R. T. Mumgaard, Y. Podpaly, M. Porkolab, J.E. Rice, A. E. Schmidt, S.

More information

Coexistence of the drift wave spectrum and low-frequency zonal flow potential in cylindrical laboratory plasmas

Coexistence of the drift wave spectrum and low-frequency zonal flow potential in cylindrical laboratory plasmas The th meeting of study on Plasma Science for Young Scientists, Mar. 7-9 28, JAEA, Naka, Ibaraki, Japan Coexistence of the drift wave spectrum and low-frequency zonal flow potential in cylindrical laboratory

More information

ECH Density Pumpout and Small Scale Turbulence in DIII-D

ECH Density Pumpout and Small Scale Turbulence in DIII-D ECH Density Pumpout and Small Scale Turbulence in DIII-D By K.L. Wong, T.L. Rhodes, R. Prater, R. Jayakumar, R. Budny, C.C. Petty, R. Nazikian, and W.A. Peebles Background It has been known for more than

More information

C-Mod Core Transport Program. Presented by Martin Greenwald C-Mod PAC Feb. 6-8, 2008 MIT Plasma Science & Fusion Center

C-Mod Core Transport Program. Presented by Martin Greenwald C-Mod PAC Feb. 6-8, 2008 MIT Plasma Science & Fusion Center C-Mod Core Transport Program Presented by Martin Greenwald C-Mod PAC Feb. 6-8, 2008 MIT Plasma Science & Fusion Center Practical Motivations for Transport Research Overall plasma behavior must be robustly

More information

Light Impurity Transport Studies in Alcator C-Mod*

Light Impurity Transport Studies in Alcator C-Mod* Light Impurity Transport Studies in Alcator C-Mod* I. O. Bespamyatnov, 1 W. L. Rowan, 1 C. L. Fiore, 2 K. W. Gentle, 1 R. S. Granet, 2 and P. E. Phillips 1 1 Fusion Research Center, The University of Texas

More information

Multi-scale turbulence, electron transport, and Zonal Flows in DIII-D

Multi-scale turbulence, electron transport, and Zonal Flows in DIII-D Multi-scale turbulence, electron transport, and Zonal Flows in DIII-D L. Schmitz1 with C. Holland2, T.L. Rhodes1, G. Wang1, J.C. Hillesheim1, A.E. White3, W. A. Peebles1, J. DeBoo4, G.R. McKee5, J. DeGrassie4,

More information

Calculating Thin Film Stack Properties. Polarization Properties of Thin Films

Calculating Thin Film Stack Properties. Polarization Properties of Thin Films Lecture 6: Thin Films Outline 1 Thin Films 2 Calculating Thin Film Stack Properties 3 Polarization Properties of Thin Films 4 Anti-Reflection Coatings 5 Interference Filters Christoph U. Keller, Utrecht

More information

Two-Stage Chirped-Beam SASE-FEL for High Power Femtosecond X-Ray Pulse Generation

Two-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 information

A Motional Stark Effect Instrument to Measure q(r) on C-Mod

A Motional Stark Effect Instrument to Measure q(r) on C-Mod 1 A Motional Stark Effect Instrument to Measure q(r) on C-Mod Presented at the 42nd Annual Meeting of the American Physical Society Division of Plasma Physics, Quebec City, Can., Oct. 2000 N. Bretz, Princeton

More information

UCLA. Broadband Magnetic and Density Fluctuation Evolution Prior to First ELM in DIII-D Edge Pedestal. Presented by G. Wang a, In collaboration with

UCLA. Broadband Magnetic and Density Fluctuation Evolution Prior to First ELM in DIII-D Edge Pedestal. Presented by G. Wang a, In collaboration with Broadband Magnetic and Density Fluctuation Evolution Prior to First ELM in DIII-D Edge Pedestal Presented by G. Wang a, In collaboration with W.A. Peebles a, P.B. Snyder b, T.L. Rhodes a, E.J. Doyle a,

More information

Physics Letters A 374 (2010) Contents lists available at ScienceDirect. Physics Letters A.

Physics Letters A 374 (2010) Contents lists available at ScienceDirect. Physics Letters A. Physics Letters A 374 (2010) 1063 1067 Contents lists available at ScienceDirect Physics Letters A www.elsevier.com/locate/pla Macroscopic far-field observation of the sub-wavelength near-field dipole

More information

Relating the L-H Power Threshold Scaling to Edge Turbulence Dynamics

Relating the L-H Power Threshold Scaling to Edge Turbulence Dynamics Relating the L-H Power Threshold Scaling to Edge Turbulence Dynamics Z. Yan 1, G.R. McKee 1, J.A. Boedo 2, D.L. Rudakov 2, P.H. Diamond 2, G. Tynan 2, R.J. Fonck 1, R.J. Groebner 3, T.H. Osborne 3, and

More information

EUV spectra from the NIST EBIT

EUV spectra from the NIST EBIT EUV spectra from the NIST EBIT D. Kilbane and G. O Sullivan Atomic and Molecular Plasma Physics group, UCD, Ireland J. D. Gillaspy, Yu. Ralchenko and J. Reader National Institute of Standards and Technology,

More information

Single Emitter Detection with Fluorescence and Extinction Spectroscopy

Single Emitter Detection with Fluorescence and Extinction Spectroscopy Single Emitter Detection with Fluorescence and Extinction Spectroscopy Michael Krall Elements of Nanophotonics Associated Seminar Recent Progress in Nanooptics & Photonics May 07, 2009 Outline Single molecule

More information

GA A26741 SCINTILLATOR-BASED DIAGNOSTIC FOR FAST ION LOSS MEASUREMENTS ON DIII-D

GA A26741 SCINTILLATOR-BASED DIAGNOSTIC FOR FAST ION LOSS MEASUREMENTS ON DIII-D GA A26741 SCINTILLATOR-BASED DIAGNOSTIC FOR FAST ION LOSS MEASUREMENTS ON DIII-D by R.K. FISHER, D.C. PACE, M. GARCÍA-MUÑOZ, W.W. HEIDBRINK, C.M. MUSCATELLO, M.A. VAN ZEELAND and Y.B. ZHU JUNE 2010 DISCLAIMER

More information

Short Wavelength Density and Low Frequency MHD Fluctuation Measurements in the STOR-M Tokamak

Short Wavelength Density and Low Frequency MHD Fluctuation Measurements in the STOR-M Tokamak 1 EX/P4-31 Short Wavelength Density and Low Frequency MHD Fluctuation Measurements in the STOR-M Tokamak C. Xiao, S. J. Livingstone, A. K. Singh, D. Raju 1, G. St. Germaine, D. Liu, C. Boucher 2, A. Hirose

More information

TRANSPORT PROGRAM C-MOD 5 YEAR REVIEW MAY, 2003 PRESENTED BY MARTIN GREENWALD MIT PLASMA SCIENCE & FUSION CENTER

TRANSPORT PROGRAM C-MOD 5 YEAR REVIEW MAY, 2003 PRESENTED BY MARTIN GREENWALD MIT PLASMA SCIENCE & FUSION CENTER TRANSPORT PROGRAM C-Mod C-MOD 5 YEAR REVIEW MAY, 2003 PRESENTED BY MARTIN GREENWALD MIT PLASMA SCIENCE & FUSION CENTER C-MOD - OPPORTUNITIES AND CHALLENGES Prediction and control are the ultimate goals

More information

Improved absolute calibration of core Thomson scattering(ts) diagnostics on Alctor C-Mod

Improved absolute calibration of core Thomson scattering(ts) diagnostics on Alctor C-Mod Improved absolute calibration of core Thomson scattering(ts) diagnostics on Alctor C-Mod Yunxing Ma, J.W.Hughes, A.Hubbard MIT Plasma Science and Fusion Center Presented at 2008 APS DPP Conference Dallas,

More information

Polar Drive on OMEGA and the NIF

Polar Drive on OMEGA and the NIF Polar Drive on OMEGA and the NIF OMEGA polar-drive geometry 21.4 Backlit x-ray image OMEGA polar-drive implosion 21.4 58.2 77.8 42. 58.8 CR ~ 5 R = 77 nm 4 nm 4 nm P. B. Radha University of Rochester Laboratory

More information

Cesium Dynamics and H - Density in the Extended Boundary Layer of Negative Hydrogen Ion Sources for Fusion

Cesium Dynamics and H - Density in the Extended Boundary Layer of Negative Hydrogen Ion Sources for Fusion Cesium Dynamics and H - Density in the Extended Boundary Layer of Negative Hydrogen Ion Sources for Fusion C. Wimmer a, U. Fantz a,b and the NNBI-Team a a Max-Planck-Institut für Plasmaphysik, EURATOM

More information

Reduction of Neoclassical Transport and Observation of a Fast Electron Driven Instability with Quasisymmetry in HSX

Reduction of Neoclassical Transport and Observation of a Fast Electron Driven Instability with Quasisymmetry in HSX Reduction of Neoclassical Transport and Observation of a Fast Electron Driven Instability with Quasisymmetry in HSX J.M. Canik 1, D.L. Brower 2, C. Deng 2, D.T.Anderson 1, F.S.B. Anderson 1, A.F. Almagri

More information

Non-local Heat Transport in Alcator C-Mod Ohmic L-mode Plasmas

Non-local Heat Transport in Alcator C-Mod Ohmic L-mode Plasmas Non-local Heat Transport in Alcator C-Mod Ohmic L-mode Plasmas C. Gao 1, J.E.Rice 1, H.J. Sun 2,3, M.L.Reinke 1, N.T.Howard 1, D. Mikkelson 4, A.E.Hubbard 1, M.Chilenski 1, J.R.Walk 1, J.W.Hughes 1, P.Ennever

More information

Medical Applications of Compact Laser-Compton Light Source

Medical Applications of Compact Laser-Compton Light Source Medical Applications of Compact Laser-Compton Light Source Y. Hwang 1, D. J. Gibson 2, R. A. Marsh 2, G. G. Anderson 2, T. Tajima 1, C. P. J. Barty 2 1 University of California, Irvine 2 Lawrence Livermore

More information

Polarization control experiences in single pass seeded FELs. Carlo Spezzani on behalf of

Polarization control experiences in single pass seeded FELs. Carlo Spezzani on behalf of Polarization control experiences in single pass seeded FELs Carlo Spezzani on behalf of the FERMI team & the storage ring FEL group Outline Introduction Storage Ring FEL test facility characterization

More information

Optical Cavity Tests of Lorentz Invariance

Optical Cavity Tests of Lorentz Invariance Light driven Nuclear-Particle physics and Cosmology 2017 (Pacifico Yokohama) April 20, 2017 Optical Cavity Tests of Lorentz Invariance Yuta Michimura Department of Physics, University of Tokyo H. Takeda,

More information

EX/4-6Rb Electrostatic fluctuation and fluctuation-induced particle flux during formation of the edge transport barrier in the JFT-2M tokamak

EX/4-6Rb Electrostatic fluctuation and fluctuation-induced particle flux during formation of the edge transport barrier in the JFT-2M tokamak Electrostatic fluctuation and fluctuation-induced particle flux during formation of the edge transport barrier in the JFT-2M tokamak T. Ido 1), Y. Miura 2), K. Hoshino 2), Y. Hamada 1), Y. Nagashima 1),

More information

SUPPLEMENTARY INFORMATION

SUPPLEMENTARY INFORMATION SUPPLEMENTARY INFORMATION DOI: 10.1038/NPHYS2397 Strong-field physics with singular light beams M. Zürch, C. Kern, P. Hansinger, A. Dreischuh, and Ch. Spielmann Supplementary Information S.1 Spectrometric

More information

GA A27418 THE ROLE OF ZONAL FLOWS AND PREDATOR- PREY OSCILLATIONS IN THE FORMATION OF CORE AND EDGE TRANSPORT BARRIERS

GA A27418 THE ROLE OF ZONAL FLOWS AND PREDATOR- PREY OSCILLATIONS IN THE FORMATION OF CORE AND EDGE TRANSPORT BARRIERS GA A27418 THE ROLE OF ZONAL FLOWS AND PREDATOR- PREY OSCILLATIONS IN THE FORMATION OF CORE AND EDGE TRANSPORT BARRIERS by L. SCHMITZ, L. ZENG, T.L. RHODES, J.C. HILLESHEIM, W.A. PEEBLES, R.J. GROEBNER,

More information