Abstract. PEGASUS Toroidal Experiment University of Wisconsin-Madison
|
|
- Albert Bailey
- 5 years ago
- Views:
Transcription
1 Abstract Measurement capabilities for the Pegasus ST are increasing to support the scientific studies of plasma behavior at very-low A. Global parameters are obtained from equilibrium reconstructions constrained by a magnetics set consisting of internal and external fluxloops, a poloidal array of B coils, and a diamagnetic loop. Pulse height analysis using a CCD detector will give a timeresolved electron temperature profile with a shotwise spatial scan. A tangentially viewing bolometer array measures profiles of radiated power. A 28 GHz single-chord microwave interferometer is used to measure line-averaged density, while a CCD-based visible bremsstrahlung array gives an approximate density profile. SPRED provides an impurity spectrum between 1-11 nm at 5 khz. MHD activity is characterized by Mirnov coil arrays and a 19 channel poloidal soft x-ray array. The proposed next generation of diagnostics includes time-evolving density, temperature and current profiles using active neutral beam spectroscopy.
2 Overview Pegasus has an extensive set of magnetics diagnostics for equilibrium and stability analysis The first generation of plasma diagnostics measure <T e >, N e l, P rad (r,t) and plasma shape The proposed next generation of plasma diagnostics will give profile measurements
3 Magnetics used for Equilibrium Reconstruction & Mode Analysis Flux loops Mirnovs on limiter Toroidal Mirnov Array
4 Two coils installed for redundancy Internal Rogowski Coil for I p The core armor and cones induce current in the plasma Rogowski - A vacuum shot accounts for these induced currents and is subtracted to get an accurate plasma current 4 Current (ka) 2-2 Installed Plasma Rogowski coils time (ms) Current measured with plasma Rogowski for vacuum shot Plasma Current (ka) time (ms) Stainless Steel foil protection Installed plasma Rogowski coil and protective steel foil OH coil current used for subtraction currents measured with vac shot used for subtraction
5 mwb Diamagnetic Loop Used to Constrain Pressure For Pegasus, B tor due to plasma is relatively large. - Alignment to ±1mm is adequate. Toroidal Flux (Wb) Vacuum Shot Subtracted Plasma Signal Plasma Shot Time (ms) Time (s) A compensation loop is used to remove signal noise due to TF switching transients
6 Schematic Layout of Mirnov Coils Side View Top View , High-Res Core Mirnov Coils (21) Poloidal Mirnov Coils (22) LFS Toroidal Mirnov Coils (6) HFS Toroidal Mirnov Coils (7)
7 Mirnov Coils Allow Full Mode Identification The 6-coil LFS toroidal array is used to obtain values of n - Uneven coil spacing allows for resolution up to n=12 d B (AU) f = Toroidal Mirnov Signals Mode Poloidal Angle (x2p ) /1 Poloidal Phase at the Wall 2. Outboard Coils Time (ms) Centerstack Coils Physical Poloidal Angle (x2p ) Outboard Coils Spectral techniques are used to extract resonant frequencies and phase delays - Cross-power gives spectrum - Cross-phase gives phase shift 1. Phase Lag (x2p ) Reconstructed Toroidal Mode Numbers n=2 (7.4 khz) n=1 (3.5 khz).8 Physical Toroidal Angle (x2p ) 1.
8 Soft X-Ray Array - MHD 19 channel poloidal array of photodiodes (courtesy of PPPL) - external kinks observed and correlate with the visible camera images - 2/1 covers large portion of the plasma - 5 mil Be filters are used to get rid of most of the edge radiation - Ni filters will be used next spring to kill off the edge radiation completely SXR Signal (AU) d B (Gauss) Time (s) Correlation between Mirnovs and SXR 2. Edge 8 SXR View of a plasma SXR fluctuation (A.U.) Midplane Time (ms) Large spatial extent of oscillations Plasma Current (ka)
9 Global Instabilities Visible on Camera DALSA 256 Camera - 1 frames per second - 1 microsecond exposure/frame - 256x256 pixels - Local PC control Shot ms 17 ms 18 ms 19 ms Center post Visible distortions on plasma boundry
10 27 GHz Single Chord Interferometer for Line Integrated Density UCLA Collaboration Possible viewing chords 6 Pegasus Density Measurement n e l (x 1 19 m -3 ) Time (ms)
11 Spectroscopic Measurement of T e up to 4 ev Ross filter system uses photodiodes to detect soft x-rays which depend heavily on T e MIST results indicate applicable range of T e () for each species: C: 7 to 15 ev O: 15 to 4 ev 1 Line Intensity Ratios (CV/CVI) D=1. to 5.m^2/s 1 Line Intensity Ratios (OVII/OVIII) 1 1 ratio ratio ParaT D=5. SharpT D=5. FlatNe D=5. ParaT D=1. SharpT D=1. FlatNe D=1. Center Temp (ev) Para T Sharp T Center Temp (ev)
12 Ross Filters 2. Ross Filter Data C V Plasma Current I p (ka) time (ms) Set of six diodes installed on PEGASUS for T e estimates - AXUV-1 diodes - 1 x 1 mm active area Filters isolate: Lyman-a line of each ion CV 2 Å Al, 25 Å Ag, 1 µm CaF 2 CVI 4 Å Al, 6 Å V OVII 5 Å Al, 5 Å Mn OVIII 4 Å Al, 45 Å Fe Diodes
13 Time Resolved SXR Pulse Height Analysis: T e (t) Pulse Height Analysis systems measure SXR spectra - Individual photon energies are measured to reconstruct the plasma emissivity spectrum - This spectrum is used to estimate T e A CCD is being developed as a time - resolved PHA detector - Thousands of pixels => Thousands of detectors - Increased count rates (better time resolution possible) - High energy resolution Monte Carlo Modeling indicates good statistics without pulse pile-up Monopixels with valid energy Split #1={.778,.195,.14,.13} Split #2={.9,.1,,} Split #3={.5,.3,.1,.1} Number of Photons Collected Modeling for Split #1 Theory for Split #1 Modeling for Split #2 Theory for Split #2 Modeling for Split #3 Theory for Split #3 6 7 Events Laboratory tests show acceptable resolution FWHM - 22 ev Energy(AU) 15 Iron Spectrum kev 25
14 PHA/CCD System on Pegasus Parallel Shift exposed.81mm 5.99mm CCD SXR/PHA assembly ready for installation.81mm 8.61mm 13.39mm 14mm masked Camera Bellows allows scan for multiple spatial points Mask used for time resolution - Exposed rows are shifted behind the mask at ~8 m sec per row - Rows remain behind mask until plasma extinguished, and are then read out The CCD/PHA system requires direct x-ray illumination of the CCD, therefore the chip must be place in machine vacuum A gold mask has been designed to add the capability of time resolution The split fraction of the camera is higher than expected - If this cannot be resolved, Si-drifted detectors may be used to get measurements of T e in the kev range
15 16 channel photodiode array installed Bolometers Radius = 12.9 cm Center Raw Emissivity (AU) Radius = 23.8 cm Radius = 34.1 cm Pinhole imaging aperture Diodes and pre-amp assembly Radius = 43.8 cm Edge time (ms) View of Plasma
16 High Time Resolution VUV Survey Spectrometer SPRED VUV Survey Spectrometer nm spectral range measured simultaneously - single radial view of plasma New high -speed 1-D imaging detector - 2 pixel 1-D camera (DALSA CL-C6) - VUV - visible image intensifier/convertor lens coupled to 1-D camera - Up to 48 frame/sec sample rate D t ~.2 msec/frame Intensity (A.U.) Intensity (A.U.) O VI (15. nm) VUV Spectroscopy (SPRED) O IV (55.4 nm) O V (62.9 nm) O V (76.1 nm) D I (12.5 nm) Pixel Pixels
17 Visible Bremsstrahlung: Z eff and N e profile Visible Bremsstrahlung emissivity sensitive to electron temperature Z eff and n e 2 CCD chip before readout CCD chip exposed when line passes slit in mask CCD chip after readout area to be imaged empty area to be skipped image of plasma Line Shift Technique Princeton Instruments camera nm filters (BP 1 A) Zoom lens Slit for line shift technique Center Post Slit frame transfer provides for time resolution Signal dominated by visible edge radiation - next generation will have improved filtering Time PEGASUS Toroidal 5 Experiment
18 Tangential SXR Plasma Imaging: j(r,t), P(R,t) Internal plasma measurements constrain equilibrium reconstructions and help determine j(r) profile Next generation of the SXR profile imaging system is in development - Direct soft x-ray illumination of the CCD chip - Ta mask used for time resolution See poster KP1.95 for more details
19 DNB Spectroscopy Provides a Variety of Internal Measurements In core plasma region, beam attenuation dominates the spatial variation of the H, D line intensity, giving a simple local estimate of Ne - Use D b line to minimize dependence of excitation rate on local plasma parameters - Use iterative solution to estimate the fex term and derive local Ne(R,t) in the plasma periphery Can recover the plasma density profile with good accuracy, even with no knowledge of the plasma temperature profile Logarithmic Derivatives (m -1 ) n = 3 n = 4 1 df ex f ex dx 1 I l di l dx n = 3 n = 4 fi 6x1 18 N e (m -3 ) Ne Ne_from3 (Da ) Ne_from4 (Db ) R majo r (m ) R majo r.6 (m).8 1.
20 T e (r,t) Estimates Available from He Beam Line Ratio Measurements Model Ratio (I 3^3S / I 3^1P ) Outer edge of plasma Metastable = 5% Metastable = 2% 1 2 T e (ev) Measurements past the magnetic axis are the key - At the outer edge, beam dynamics are in non-linear evolution - State populations are very sensitive to initial metastable fraction - Large differences seen in the ratios for different metastable fractions - Deeper inside the plasma, beam population has equilibrated Model Ratio (I 3^3S / I 3^1P ) Past magnetic axis %Metastable = 5% %Metastable = 2% - Line ratio is mainly sensitive to local temperature - Virtually no difference seen in the ratios for different metastable fractions 1 2 T e (ev) 3 4 5
21 Future Work Thomson Scattering: Single point; spectrometer available; need laser and optics Optics for the TS system Detectors Li pellet injection - Measures the local magnetic field tilt - infers the j(r) and q(r) profiles - Compliment the CCD soft x-ray imaging system
22 Summary Global parameters are constrained during equilibrium fitting by magnetics - poloidal fluxloops for geometry - diamagnetic loop for plasma pressure - plasma Rogowski for total plasma current The first generation of plasma diagnostics measure <T e >, N e l, P rad (r,t) and plasma shape Next generation of diagnostics will provide time evolving density, temperature and current profiles - DNB spectroscopy - Thompson Scattering
Abstract. , low-q operating space at near-unity aspect ratio. Plasmas are characterized by high b t ( 20% to date); very low toroidal field (B t
Abstract The is exploring stability limits in the high b t, low-q operating space at near-unity aspect ratio. Plasmas are characterized by high b t ( 2% to date); very low toroidal field (B t.7 T); densities
More informationX-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 informationIntroduction to the Diagnosis of Magnetically Confined Thermonuclear Plasma
Introduction to the Diagnosis of Magnetically Confined Thermonuclear Plasma Core diagnostics II: Bolometry and Soft X-rays J. Arturo Alonso Laboratorio Nacional de Fusión EURATOM-CIEMAT E6 P2.10 arturo.alonso@ciemat.es
More informationNon-Solenoidal Plasma Startup in
Non-Solenoidal Plasma Startup in the A.C. Sontag for the Pegasus Research Team A.C. Sontag, 5th APS-DPP, Nov. 2, 28 1 Point-Source DC Helicity Injection Provides Viable Non-Solenoidal Startup Technique
More informationFormation of High-b ECH Plasma and Inward Particle Diffusion in RT-1
J Fusion Energ (2010) 29:553 557 DOI 10.1007/s10894-010-9327-6 ORIGINAL RESEARCH Formation of High-b ECH Plasma and Inward Particle Diffusion in RT-1 H. Saitoh Z. Yoshida J. Morikawa Y. Yano T. Mizushima
More informationPlasma Spectroscopy in ISTTOK
Plasma Spectroscopy in ISTTOK J. Figueiredo 1, R. B. Gomes 1, T. Pereira 1, H. Fernandes 1, A. Sharakovski 2 1 Associação EURATOM/IST, Centro de Fusão Nuclear, IST, 1049-001 Lisboa, Portugal 2 Association
More informationTangential SX imaging for visualization of fluctuations in toroidal plasmas
Tangential SX imaging for visualization of fluctuations in toroidal plasmas S. Ohdachi,, K. Toi, G. Fuchs and the LHD Experimental Group National Institute for Fusion Science Outline of my talk 1. Merit
More informationCurrent Drive Experiments in the Helicity Injected Torus (HIT II)
Current Drive Experiments in the Helicity Injected Torus (HIT II) A. J. Redd, T. R. Jarboe, P. Gu, W. T. Hamp, V. A. Izzo, B. A. Nelson, R. G. O Neill, R. Raman, J. A. Rogers, P. E. Sieck and R. J. Smith
More informationSTATUS OF THE HIT-II EXPERIMENTAL PROGRAM
STATUS OF THE HIT-II EXPERIMENTAL PROGRAM Roger J. Smith and the HIT-II Team Plasma Dynamics Group University of Washington, Seattle, Washington HIT-II Team Faculty/Staff Support Staff Graduate Students
More informationThe Plasma Phase. Chapter 1. An experiment - measure and understand transport processes in a plasma. Chapter 2. An introduction to plasma physics
The Plasma Phase Chapter 1. An experiment - measure and understand transport processes in a plasma Three important vugraphs What we have just talked about The diagnostics Chapter 2. An introduction to
More informationDiagnostics for Burning Plasma Physics Studies: A Status Report.
Diagnostics for Burning Plasma Physics Studies: A Status Report. Kenneth M. Young Princeton Plasma Physics Laboratory UFA Workshop on Burning Plasma Science December 11-13 Austin, TX Aspects of Plasma
More informationImpurity transport analysis & preparation of W injection experiments on KSTAR
Impurity transport analysis & preparation of W injection experiments on KSTAR J. H. Hong, H. Y. Lee, S. H. Lee, S. Jang, J. Jang, T. Jeon, H. Lee, and W. Choe ( ) S. G. Lee, C. R. Seon, J. Kim, ( ) 마스터부제목스타일편집
More informationRecent results on non-inductive startup of highly overdense ST plasma by electron Bernstein wave on LATE
Recent results on non-inductive startup of highly overdense ST plasma by electron Bernstein wave on LATE M. Uchida, Y. Nozawa, H. Tanaka, T. Maekawa Graduate School of Energy Science, Kyoto University
More informationD.J. Schlossberg, D.J. Battaglia, M.W. Bongard, R.J. Fonck, A.J. Redd. University of Wisconsin - Madison 1500 Engineering Drive Madison, WI 53706
D.J. Schlossberg, D.J. Battaglia, M.W. Bongard, R.J. Fonck, A.J. Redd University of Wisconsin - Madison 1500 Engineering Drive Madison, WI 53706 Concept Overview Implementation on PEGASUS Results Current
More informationPlasma impurity composition in Alcator C-Mod tokamak.
Plasma impurity composition in Alcator C-Mod tokamak. I. O. Bespamyatnov a, W. L. Rowan a, K. T. Liao a, M. Brookman a, M. L. Reinke b, E. S. Marmar b, M. J. Greenwald b a Institute for Fusion Studies,
More informationIon Temperature Measurements in the
Ion Temperature Measurements in the PEGASUS Toroidal Experiment M.G. Burke, M.W. Bongard, R.J. Fonck, D.J. Schlossberg, A.J. Redd 52 nd Annual APS-DPP University of Wisconsin-Madison Chicago, IL November
More informationMeasurements 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 informationParticle Transport and Edge Dynamo in the MST RFP
Particle Transport and Edge Dynamo in the ST RFP International RFP Workshop 28 February 2000, adison, WI D. J. Den Hartog Department of Physics University of Wisconsin adison In collaboration with J. K.
More informationInformation Session for the ITER CPTS System
Information Session for the ITER CPTS System Fusion for Energy Barcelona, 15 April 2015 1 Introduction to the meeting Information provided is preliminary and subject to Agenda change ahead of formal tendering
More informationApplication of atomic data to quantitative analysis of tungsten spectra on EAST tokamak
Technical Meeting on Uncertainty Assessment and Benchmark Experiments for Atomic and Molecular Data for Fusion Applications, 19-21 December 2016, Vienna, Austria Application of atomic data to quantitative
More informationInitial Experimental Program Plan for HSX
Initial Experimental Program Plan for HSX D.T. Anderson, A F. Almagri, F.S.B. Anderson, J. Chen, S. Gerhardt, V. Sakaguchi, J. Shafii and J.N. Talmadge, UW-Madison HSX Plasma Laboratory Team The Helically
More informationAdvancing Local Helicity Injection for Non-Solenoidal Tokamak Startup
Advancing Local Helicity Injection for Non-Solenoidal Tokamak Startup M.W. Bongard G.M. Bodner, M.G. Burke, R.J. Fonck, J.L. Pachicano, J.M. Perry, C. Pierren, J.A. Reusch, A.T. Rhodes, N.J. Richner, C.
More informationDesign of New Optical System for Visible Plasma Radiation Measurements at COMPASS Tokamak
WDS'08 Proceedings of Contributed Papers, Part II, 100 104, 2008. ISBN 978-80-7378-066-1 MATFYZPRESS Design of New Optical System for Visible Plasma Radiation Measurements at COMPASS Tokamak D. I. Naydenkova
More informationEXTREME ULTRAVIOLET AND SOFT X-RAY LASERS
Chapter 7 EXTREME ULTRAVIOLET AND SOFT X-RAY LASERS Hot dense plasma lasing medium d θ λ λ Visible laser pump Ch07_00VG.ai The Processes of Absorption, Spontaneous Emission, and Stimulated Emission Absorption
More information1 EX/P7-35. Spectroscopic Studies on GLAST-III Varying the Inductance and Charging Voltage of Vertical Field Coils
1 EX/P7-35 Spectroscopic Studies on GLAST-III Varying the Inductance and Charging Voltage of Vertical Field Coils Farah Deeba, A.Qayyum, Zahoor Ahmad, S. Ahmad, R. Khan and S. Hussain National Tokamak
More informationCurrent Drive Experiments in the HIT-II Spherical Tokamak
Current Drive Experiments in the HIT-II Spherical Tokamak T. R. Jarboe, P. Gu, V. A. Izzo, P. E. Jewell, K. J. McCollam, B. A. Nelson, R. Raman, A. J. Redd, P. E. Sieck, and R. J. Smith, Aerospace & Energetics
More informationchannel system which covers both sides of the laser line. Coverage on both sides of the spectrum allows for
Large-Area Avalanche Photodiode Detector Array Upgrade for a Ruby-Laser Thomson Scattering System T.M. Biewer, D.J. Den Hartog, D.J. Holly Department of Physics, University of Wisconsin-Madison M.R. Stoneking
More informationPlasma Radiation. Ø Free electrons Blackbody emission Bremsstrahlung
Plasma Radiation Ø Free electrons Blackbody emission Bremsstrahlung Ø Bound electrons (Z>2) Unresolved, multi-line emission Resolved line emission -- Single Z +n Objective Infer a thermodynamic quantity
More informationX-TOD Update. Facility Advisory Committee Photon Breakout Session. October 30, 2007
XTOD Update Facility Advisory Committee Photon Breakout Session LCLS Layout Linac Undulator Hall FEE (Front-End-Enclosure) Diagnostics SOMS HOMS X-Ray Tunnel FEH (Far Experimental Hall) NEH (Near Experimental
More informationMulti-Color Soft X-ray Diagnostic Design for the Levitated Dipole Experiment (LDX)
Multi-Color Soft X-ray Diagnostic Design for the Levitated Dipole Experiment (LDX) M.S. Davis, D.T.!Garnier, M.E. Mauel Columbia University J.L.!Ellsworth, J. Kesner, P.C. Michael PSFC MIT 1 Abstract We
More informationFirst Quantification of Electron Thermal Transport in the MST Reversed-Field Pinch
First Quantification of Electron Thermal Transport in the MST Reversed-Field Pinch Title Abs. TS over. MStFIt j 2kA Te ne Zeff 4kA Te ne Zeff Pohm, W, TauE,beta Xe,D Mot. FIR pola. Monte Carlo Un. An.
More informationSUMMARY 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 informationStudy 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 informationEUV Reflectivity measurements on Acktar Sample Magic Black
Report EUV Reflectivity measurements on Acktar Sample Magic Black S. Döring, Dr. K. Mann Laser-Laboratorium Göttingen e.v. October 28, 2011 Contents 1 Introduction 3 2 Setup 3 3 Measurements 4 4 Conclusion
More informationNoninductive Formation of Spherical Tokamak at 7 Times the Plasma Cutoff Density by Electron Bernstein Wave Heating and Current Drive on LATE
1 EX/P6-18 Noninductive Formation of Spherical Tokamak at 7 Times the Plasma Cutoff Density by Electron Bernstein Wave Heating and Current Drive on LATE M. Uchida, T. Maekawa, H. Tanaka, F. Watanabe, Y.
More informationRESISTIVE WALL MODE STABILIZATION RESEARCH ON DIII D STATUS AND RECENT RESULTS
RESISTIVE WALL MODE STABILIZATION RESEARCH ON STATUS AND RECENT RESULTS by A.M. Garofalo1 in collaboration with J. Bialek,1 M.S. Chance,2 M.S. Chu,3 T.H. Jensen,3 L.C. Johnson,2 R.J. La Haye,3 G.A. Navratil,1
More informationBehavior of Compact Toroid Injected into the External Magnetic Field
Behavior of Compact Toroid Injected into the External Magnetic Field M. Nagata 1), N. Fukumoto 1), H. Ogawa 2), T. Ogawa 2), K. Uehara 2), H. Niimi 3), T. Shibata 2), Y. Suzuki 4), Y. Miura 2), N. Kayukawa
More informationD.J. Schlossberg, D.J. Battaglia, M.W. Bongard, R.J. Fonck, A.J. Redd. University of Wisconsin - Madison 1500 Engineering Drive Madison, WI 53706
D.J. Schlossberg, D.J. Battaglia, M.W. Bongard, R.J. Fonck, A.J. Redd University of Wisconsin - Madison 1500 Engineering Drive Madison, WI 53706 Non-solenoidal startup using point-source DC helicity injectors
More informationPulse Height Analysis System (PHA) designed for W7-X Presented by Monika KUBKOWSKA
Pulse Height Analysis System (PHA) designed for W7-X Presented by Monika KUBKOWSKA This scientific work has been partly supported by Polish Ministry of Science and Higher Education within the framework
More informationResponse of thin foil Faraday Cup lost alpha particle detector in intense neutron and gamma ray radiation fields
Response of thin foil Faraday Cup lost alpha particle detector in intense neutron and gamma ray radiation fields F.E. Cecil 1, V. Kiptily 2, D. Darrow 3, A. Horton 2, K. Fullard 2, K. Lawson 2, G. Matthews
More informationThin Faraday foil collectors as a lost ion diagnostic
Thin Faraday foil collectors as a lost ion diagnostic F.E. Cecil Colorado School of Mines D.S. Darrow and R. Ellis Princeton Plasma Physics Lab W.W. Heidbrink University of California, Irvine V. Kiptily
More informationPlasma shielding during ITER disruptions
Plasma shielding during ITER disruptions Sergey Pestchanyi and Richard Pitts 1 Integrated tokamak code TOKES is a workshop with various tools objects Radiation bremsstrahlung recombination s line s cyclotron
More informationThe measurement of plasma equilibrium and fluctuations near the plasma edge using a Rogowski probe in the TST-2 spherical tokamak
The measurement of plasma equilibrium and fluctuations near the plasma edge using a Rogowski probe in the TST-2 spherical tokamak H. Furui, Y. Nagashima 2, A. Ejiri, Y. Takase, N. Tsujii, C. Z. Cheng,
More informationExtension of Wavelength Range in Absolute Intensity Calibration of Space-Resolved EUV Spectrometer for LHD Diagnostics )
Extension of Wavelength Range in Absolute Intensity Calibration of Space-Resolved EUV Spectrometer for LHD Diagnostics ) Chunfeng DONG 1), Shigeru MORITA 1,2), Motoshi GOTO 1,2) and Erhui WANG 2) 1) National
More informationSpectroscopic studies of impurities in the LHD plasmas
Spectroscopic studies of impurities in the LHD plasmas Visitor: Zhenwei Wu (the institute of plasma physics, CAS -ASIPP) Host: Shigeru Morita (the national institute for fusion science -NIFS) Content 1.
More informationDIAGNOSTICS 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 informationNon-inductive plasma startup and current profile modification in Pegasus spherical torus discharges
Non-inductive plasma startup and current profile modification in Pegasus spherical torus discharges Aaron J. Redd for the Pegasus Team 2008 Innovative Confinement Concepts Workshop Reno, Nevada June 24-27,
More informationBolometry. H. Kroegler Assciazione Euratom-ENEA sulla Fusione, Frascati (Italy)
Bolometry H. Kroegler Assciazione Euratom-ENEA sulla Fusione, Frascati (Italy) Revised May 28, 2002 1. Radiated power Time and space resolved measurements of the total plasma radiation can be done by means
More informationThe Sheared Flow Stabilized Z-Pinch
The Sheared Flow Stabilized Z-Pinch U. Shumlak, J. Chadney, R.P. Golingo, D.J. Den Hartog, M.C. Hughes, S.D. Knecht, B.A. Nelson, W. Lowrie, R.J. Oberto, M.P. Ross, J.L. Rohrbach, and G.V. Vogman Aerospace
More informationEquilibrium Evolution in the ZaP Flow Z-Pinch
Equilibrium Evolution in the ZaP Flow Z-Pinch U. Shumlak, B.A. Nelson, C.S. Adams, D.J. Den Hartog, R.P. Golingo, S. L. Jackson, S.D. Knecht, J. Pasko, and D.T. Schmuland University of Washington, Seattle
More informationAdvancing Toward Reactor Relevant Startup via Localized Helicity Injection at the Pegasus Toroidal Experiment
Advancing Toward Reactor Relevant Startup via Localized Helicity Injection at the Pegasus Toroidal Experiment E. T. Hinson J. L. Barr, M. W. Bongard, M. G. Burke, R. J. Fonck, J. M. Perry, A. J. Redd,
More informationAnalyses of Visible Images of the Plasma Periphery Observed with Tangentially Viewing CCD Cameras in the Large Helical Device
Analyses of Visible Images of the Plasma Periphery Observed with Tangentially Viewing CCD Cameras in the Large Helical Device M. SHOJI, T. WATANABE, S. MASUZAKI, H. YAMADA, A. KOMORI and LHD Experimental
More informationDevelopment of a High-Speed VUV Camera System for 2-Dimensional Imaging of Edge Turbulent Structure in the LHD
Development of a High-Speed VUV Camera System for 2-Dimensional Imaging of Edge Turbulent Structure in the LHD Masaki TAKEUCHI, Satoshi OHDACHI and LHD experimental group National Institute for Fusion
More informationStudies 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 informationReduction procedure of long-slit optical spectra. Astrophysical observatory of Asiago
Reduction procedure of long-slit optical spectra Astrophysical observatory of Asiago Spectrograph: slit + dispersion grating + detector (CCD) It produces two-dimension data: Spatial direction (x) along
More informationMetallic magnetic calorimeters. Andreas Fleischmann Heidelberg University
Metallic magnetic calorimeters Andreas Fleischmann Heidelberg University metallic magnetic calorimeters paramagnetic sensor: Au:Er 300ppm, Ag:Er 300ppm M detector signal: T main differences to calorimeters
More informationCHEM*3440. Photon Energy Units. Spectrum of Electromagnetic Radiation. Chemical Instrumentation. Spectroscopic Experimental Concept.
Spectrum of Electromagnetic Radiation Electromagnetic radiation is light. Different energy light interacts with different motions in molecules. CHEM*344 Chemical Instrumentation Topic 7 Spectrometry Radiofrequency
More informationFirst Flight of the Levitated Dipole Experiment
First Flight of the Levitated Dipole Experiment Columbia University Darren Garnier, Michael Mauel Columbia University Alex Boxer, Jen Ellsworth, Jay Kesner MIT Plasma Science and Fusion Center APS Division
More informationPower Balance and Scaling of the Radiated Power in the Divertor and Main Plasma of Alcator C-Mod
PFC/JA-94-15 Power Balance and Scaling of the Radiated Power in the Divertor and Main Plasma of Alcator C-Mod J.A. Goetz, B. Lipschultz, M.A. Graf, C. Kurz, R. Nachtrieb, J.A. Snipes, J.L. Terry Plasma
More informationValidation 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 informationA facility for Femtosecond Soft X-Ray Imaging on the Nanoscale
A facility for Femtosecond Soft X-Ray Imaging on the Nanoscale Jan Lüning Outline Scientific motivation: Random magnetization processes Technique: Lensless imaging by Fourier Transform holography Feasibility:
More informationInternal magnetic field measurement in tokamak plasmas using a Zeeman polarimeter
PRAMANA cfl Indian Academy of Sciences Vol. 55, Nos 5 & 6 journal of Nov. & Dec. 2000 physics pp. 751 756 Internal magnetic field measurement in tokamak plasmas using a Zeeman polarimeter M JAGADEESHWARI
More informationPhysics and Operations Plan for LDX
Physics and Operations Plan for LDX Columbia University A. Hansen D.T. Garnier, M.E. Mauel, T. Sunn Pedersen, E. Ortiz Columbia University J. Kesner, C.M. Jones, I. Karim, P. Michael, J. Minervini, A.
More informationExperiments with Thin Electron Beam at GOL-3
8 th International Conference on Open Magnetic Systems for Plasma Confinement July 8, 21, Novosibirsk, Russia Experiments with Thin Electron Beam at GOL-3 V.V. Postupaev, A.V. Arzhannikov, V.T. Astrelin,
More information- Effect of Stochastic Field and Resonant Magnetic Perturbation on Global MHD Fluctuation -
15TH WORKSHOP ON MHD STABILITY CONTROL: "US-Japan Workshop on 3D Magnetic Field Effects in MHD Control" U. Wisconsin, Madison, Nov 15-17, 17, 2010 LHD experiments relevant to Tokamak MHD control - Effect
More informationFlow dynamics and plasma heating of spheromaks in SSX
Flow dynamics and plasma heating of spheromaks in SSX M. R. Brown and C. D. Cothran, D. Cohen, J. Horwitz, and V. Chaplin Department of Physics and Astronomy Center for Magnetic Self Organization Swarthmore
More informationNonsolenoidal Startup and Plasma Stability at Near-Unity Aspect Ratio in the Pegasus Toroidal Experiment
1 EXS/P2-07 Nonsolenoidal Startup and Plasma Stability at Near-Unity Aspect Ratio in the Pegasus Toroidal Experiment R.J. Fonck 1), D.J. Battaglia 2), M.W. Bongard 1), E.T. Hinson 1), A.J. Redd 1), D.J.
More informationLONG, STABLE PLASMA GENERATION IN THE ZAP FLOW Z-PINCH
LONG, STABLE PLASMA GENERATION IN THE ZAP FLOW Z-PINCH B.A. Nelson, U. Shumlak, C. Bowers, S. Doty, R.P. Golingo, M.C. Hughes, S.D. Knecht, K. Lambert, W. Lowrie, N. Murakami, M.C. Paliwoda, E. Ransom,
More informationR&D Status of KSTAR Soft X-ray Tomographic Array Diagnostic System
R&D Status of KSTAR Soft X-ray Tomographic Array Diagnostic System Seung Hun Lee, Junghee Kim, and W. Choe Department of Physics KAIST (Korea Advanced Institute of Science and Technology) JA-KO Joint Workshop
More informationSoft X-ray emission profile and mode structure during MHD events in the TST-2 spherical tokamak
P6-29 Soft X-ray emission profile and mode structure during MHD events in the TST-2 spherical tokamak H.Tojo, A.Ejiri, Y.Takase, Y.Torii, T.Osako, M.Sasaki (1), T.Masuda, Y.Shimada N.Sumitomo (1), J.Tsujimura,
More informationThe Performance of the EUV Spectroscope (EXCEED) Onboard the SPRINT-A Mission
The Performance of the EUV Spectroscope (EXCEED) Onboard the SPRINT-A Mission K. Yoshioka, G. Murakami, A. Yamazaki, K. Uemizu, T. Kimura (ISAS/JAXA), I. Yoshikawa, K. Uji (Univ. Tokyo) F. Tsuchiya, and
More informationLower Hybrid Current Drive Experiments on Alcator C-Mod: Comparison with Theory and Simulation
Lower Hybrid Current Drive Experiments on Alcator C-Mod: Comparison with Theory and Simulation P.T. Bonoli, A. E. Hubbard, J. Ko, R. Parker, A.E. Schmidt, G. Wallace, J. C. Wright, and the Alcator C-Mod
More informationThe current status of the Lithium beam diagnostic at ASDEX Upgrade
The current status of the Lithium beam diagnostic at ASDEX Upgrade Elisabeth Wolfrum Josef Schweinzer Matthias Reich Rainer Fischer Max Planck Institut für Plasmaphysik Garching, Germany Outline Experimental
More informationFlow measurements in the Scrape-Off Layer of Alcator C-Mod using Impurity Plumes
Flow measurements in the Scrape-Off Layer of Alcator C-Mod using Impurity Plumes S. Gangadhara,. Laombard M.I.T. Plasma Science and Fusion Center, 175 Albany St., Cambridge, MA 2139 USA Abstract Accurate
More informationEDS User School. Principles of Electron Beam Microanalysis
EDS User School Principles of Electron Beam Microanalysis Outline 1.) Beam-specimen interactions 2.) EDS spectra: Origin of Bremsstrahlung and characteristic peaks 3.) Moseley s law 4.) Characteristic
More informationInitial Investigations of H-mode Edge Dynamics in the PEGASUS Toroidal Experiment
Initial Investigations of H-mode Edge Dynamics in the PEGASUS Toroidal Experiment M.W. Bongard, R.J. Fonck, K.E. Thome, D.S. Thompson 55 th Annual Meeting of the APS Division of Plasma Physics University
More informationActive and Passive MHD Spectroscopy on Alcator C-Mod
Active and Passive MHD Spectroscopy on Alcator C-Mod J A Snipes, D A Schmittdiel, C Boswell, A Fasoli *, W Burke, R S Granetz, R R Parker, S Sharapov #, R Vieira MIT Plasma Science and Fusion Center, Cambridge,
More informationUltrafast Dynamics and Single Particle Spectroscopy of Au-CdSe Nanorods
Supporting Information Ultrafast Dynamics and Single Particle Spectroscopy of Au-CdSe Nanorods G. Sagarzazu a, K. Inoue b, M. Saruyama b, M. Sakamoto b, T. Teranishi b, S. Masuo a and N. Tamai a a Department
More informationObservation of Neo-Classical Ion Pinch in the Electric Tokamak*
1 EX/P6-29 Observation of Neo-Classical Ion Pinch in the Electric Tokamak* R. J. Taylor, T. A. Carter, J.-L. Gauvreau, P.-A. Gourdain, A. Grossman, D. J. LaFonteese, D. C. Pace, L. W. Schmitz, A. E. White,
More information2.6 Plasma Diagnostic System
2.6 Plasma Diagnostic System 2.6.1 Selected Diagnostic Systems and Startup Set 1 2.6.2 Diagnostic Integration 1 2.6.2.1 In-vessel Installations 3 2.6.2.2 Equatorial and Upper Ports 4 2.6.2.3 Divertor Ports
More information6. ELECTRODE EXPERIMENT
6. ELECTRODE EXPERIMENT The purpose of this Section is to illustrate how the electrodes for PROTO-SPHERA have been developed. They were the most unconventional items and among the major concerns, when
More informationThe MID instrument.
The MID instrument International Workshop on the Materials Imaging and Dynamics Instrument at the European XFEL Grenoble, Oct 28/29, 2009 Thomas Tschentscher thomas.tschentscher@xfel.eu Outline 2 History
More informationSet-up for ultrafast time-resolved x-ray diffraction using a femtosecond laser-plasma kev x-ray-source
Set-up for ultrafast time-resolved x-ray diffraction using a femtosecond laser-plasma kev x-ray-source C. Blome, K. Sokolowski-Tinten *, C. Dietrich, A. Tarasevitch, D. von der Linde Inst. for Laser- and
More informationATHENA / AD-1. First production and detection of cold antihydrogen atoms. ATHENA Collaboration. Rolf Landua CERN
ATHENA / AD-1 First production and detection of cold antihydrogen atoms ATHENA Collaboration Rolf Landua CERN 1 LONG TERM PHYSICS GOALS Antihydrogen = Hydrogen? CPT Gravity But... 2 FIRST GOAL PRODUCTION
More informationBlob sizes and velocities in the Alcator C-Mod scrapeoff
P1-59 Blob sizes and velocities in the Alcator C-Mod scrapeoff layer R. Kube a,b,*, O. E. Garcia a,b, B. LaBombard b, J. L. Terry b, S. J. Zweben c a Department of Physics and Technology, University of
More information3-D Random Reconnection Model of the Sawtooth Crash
3-D Random Reconnection Model of the Sawtooth Crash Hyeon K. Park Princeton Plasma PhysicsN Laboratory Princeton University at IPELS, 2007 Cairns, Australia August 5-9, 2007 Collaboration with N.C. Luhmann,
More informationActive MHD Control Needs in Helical Configurations
Active MHD Control Needs in Helical Configurations M.C. Zarnstorff 1 Presented by E. Fredrickson 1 With thanks to A. Weller 2, J. Geiger 2, A. Reiman 1, and the W7-AS Team and NBI-Group. 1 Princeton Plasma
More informationTwo Dimensional SR-Interferometer at PETRA III. Artem Novokshonov DESY, Tomsk Polytechnic University
Two Dimensional SR-Interferometer at PETRA III Artem Novokshonov DESY, Tomsk Polytechnic University First Part: Two Dimensional Interferometer at Petra III Interferometer principal Schematic of the Interferometer
More informationImpurity accumulation in the main plasma and radiation processes in the divetor plasma of JT-60U
1 EX/P4-25 Impurity accumulation in the main plasma and radiation processes in the divetor plasma of JT-6U T. Nakano, H. Kubo, N. Asakura, K. Shimizu and S. Higashijima Japan Atomic Energy Agency, Naka,
More informationA Hall Sensor Array for Internal Current Profile Constraint
A Hall Sensor Array for Internal Current Profile Constraint M.W. Bongard, R.J. Fonck, B.T. Lewicki, A.J. Redd University of Wisconsin-Madison 18 th Topical Conference on High-Temperature Plasma Diagnostics
More informationInfluence of ECR Heating on NBI-driven Alfvén Eigenmodes in the TJ-II Stellarator
EX/P- Influence of ECR Heating on NBI-driven Alfvén Eigenmodes in the TJ-II Stellarator Á. Cappa, F. Castejón, T. Estrada, J.M. Fontdecaba, M. Liniers and E. Ascasíbar Laboratorio Nacional de Fusión CIEMAT,
More informationThe details of point source helicity injection as a noninductive startup technique must be characterized:
The details of point source helicity injection as a noninductive startup technique must be characterized: Is energy confinement dominated by cross-field transport? Is energy confinement dominated by parallel
More informationPower Balance Analysis of Wendelstein 7-X Plasmas Using Profile Diagnostics
EUROFUSION WPS1-PR(16) 16280 S Bozhenkov et al. Power Balance Analysis of Wendelstein 7-X Plasmas Using Profile Diagnostics Preprint of Paper to be submitted for publication in 43rd European Physical Society
More informationElectron Bernstein Wave (EBW) Physics In NSTX and PEGASUS
Electron Bernstein Wave (EBW) Physics In NSTX and PEGASUS G. Taylor 1, J.B. Caughman 2, M.D. Carter 2, S. Diem 1, P.C. Efthimion 1, R.W. Harvey 3, J. Preinhaelter 4, J.B. Wilgen 2, T.S. Bigelow 2, R.A.
More informationD. Smith, R. Fonck, G. McKee, D. Thompson, and I. Uzun-Kaymak
College W&M Colorado Sch Mines Columbia U CompX General Atomics INL Johns Hopkins U LANL LLNL Lodestar MIT Nova Photonics New York U Old Dominion U ORNL PPPL PSI Princeton U Purdue U SNL Think Tank, Inc.
More informationX-Ray Photoelectron Spectroscopy (XPS) Prof. Paul K. Chu
X-Ray Photoelectron Spectroscopy (XPS) Prof. Paul K. Chu X-ray Photoelectron Spectroscopy Introduction Qualitative analysis Quantitative analysis Charging compensation Small area analysis and XPS imaging
More informationGA A22722 CENTRAL THOMSON SCATTERING UPGRADE ON DIII D
GA A22722 CENTRAL THOMSON SCATTERING UPGRADE ON DIII D by D.G. NILSON, T.N. CARLSTROM, C.L. HSIEH, B.W. STALLARD, and R.E. STOCKDALE NOVEMBER 1997 DISCLAIMER This report was prepared as an account of work
More informationX-ray Spectroscopy on Fusion Plasmas
X-ray Spectroscopy on s An ongoing discussion between the two Manfreds Manfred von Hellermann for CXRS Manfred Bitter for x-ray spectroscopy G. Bertschinger for many contributers (Bitter, Kunze, Weinheimer,
More informationAbstract. 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 informationEffect of the MHD Perturbations on Runaway Beam Formation during Disruptions in the T-10 Tokamak
1 Effect of the MHD Perturbations on Runaway Beam Formation during Disruptions in the T-10 Tokamak P. V. Savrukhin 1), E. V. Popova 1), A. V. Sushkov 1), D. E. Kravtsov 1), S. A. Grashin 1), V. P. Budaev
More information