Experimental evaluation of nonlinear collision effect on the beam slowing-down process
|
|
- Wendy Warren
- 5 years ago
- Views:
Transcription
1 P-2 Experimental evaluation of nonlinear collision effect on the beam slowing-down process H. Nuga R. Seki,2 S. Kamio M. Osakabe,2 M. Yokoyama,2 M. Isobe,2 K. Ogawa,2 National Institute for Fusion Science, Toki, Japan 2 SOKENDAI (The Graduate University for Advanced Studies), Toki, Japan H. Nuga (NIFS) Sep./27 / 5
2 Summary Summary Aims of this research Results To develop a Fokker-Planck (F-P) simulation code for the analysis of the behavior of Energetic Particles (EPs) in fusion plasmas. To validate our F-P code, especially beam-beam (b-b) collision effect, the neutron emission rate on LHD is analyzed. The effect of b-b collision appears clearly in LHD experiments. The effect is estimated by the neutron emission rate. Our F-P code can describe the b-b collision effect. The simulation results have same tendency to experiments. The absolute value of the simulated neutron emission rate is over estimated. Lack of fast ion loss mechanisms. Too simple assumptions. H. Nuga (NIFS) Sep./27 2 / 5
3 intro Introduction Background To analyze the behavior of beam ions, implementation of a Fokker-Planck code, TASK/FP, in integrated code TASK3D-a is ongoing. Experiment group requires codes enable to estimate followings: Beam heating power to electron and ions. Neutron emission rate from DD reaction. r and v distribution of beam ions. On LHD, GNET code (Monte Carlo) has been used for analyses. This code is accurate but heavy. A code which obtains the computational performance in exchange for the loss of accuracy is required. F-P code is suitable. F-P codes require less CPU than particle codes. Easy to calculate time evolution of f. Difficult to include orbit width effect. The progress of the implementation and some analysis results using TASK/FP are presented. H. Nuga (NIFS) Sep./27 3 / 5
4 intro Introduction Motivation We focus on the contribution of b-b collision to EPs. Two EPs, which have similar velocity, may interact each other through b-b collision effect. This effect may deform f of EP. There is a possibility b-b collision influences to the beam confinement. Ex.) May distorted f of α particle by NBI affect AE in ITER? Nonlinear collision model[] adopted in our code can take the effect into account. To validate our code, a series of experiments, which use tangential H and D NBs, were held. B.J. Braams, Phys. Fluid B,, 355, (989). H. Nuga (NIFS) Sep./27 4 / 5
5 intro Introduction Process of F-P analysis In our F-P analysis, FIT3D[,2] and TASK/FP[3,4] are combined. FIT3D calculates birth fbeam abs (p, θ, ρ) from E beam, P port, and plasma beam parameters. TASK/FP calculates time evolution of f beam (p, θ, ρ) using f abs beam as a source term. Code name Input Output Role FIT3D (HFREYA) E beam, P port beam Birth profile Calculate beam ionization FIT3D (MCNBI) Birth profile P abs beam abs (p, θ, ρ) Calculate prompt loss TASK/FP n e, T e, T i, fbeam abs beam(p, θ, ρ, t) Calculate evolution of f beam S. Murakami, et al, Fusion Technology, 27, P. Vincenzi, et al, Plasma Phys. Control. Fusion, 58, 2, 258, H. Nuga, A. Fukuyama, Progress in Nuclear Science and Technology, 2, 78, 2. 4 H. Nuga, et al, Phys. Plasmas, 23, 6256, 26. H. Nuga (NIFS) Sep./27 5 / 5
6 intro Introduction Simulation Code: TASK/FP TASK/FP is a Fokker-Planck code to calculate the time evolution of momentum distribution function f in 3 dimension : (p, θ, ρ). Fokker-Planck equation in (p, θ, ρ) coordinate f s t = p S + H, H = S NB + L CX ( f ) + S n f ( f ) + L sink ( f ) + R( f ) Note: H includes beam source, charge exchange loss, fusion reaction source and loss, artificial loss, and radial diffusion terms. In the present, the radial diffusion term is not used. H. Nuga (NIFS) Sep./27 6 / 5
7 intro Introduction Code extension for experimental analysis Although TASK/FP is developed as a prediction code originally, to use for experimental analysis, it is extended as below. Momentum distribution function is divided into two components: bulk f and non-thermal f b, namely f = f + f b. Bulk component f is a Maxwellian with measured n and T. Bulk component f is updated by Maxwellian in each time step. Evolution of f b is calculated by using F-P eq. f b t = S + S NB + L CX ( f ) + S n f ( f ) + L sink ( f ) + R( f ) S NB is obtained from FIT3D. To conserve the density in the bulk region, f b has a sink term in < p < 3p th, L sink. H. Nuga (NIFS) Sep./27 7 / 5
8 Experiment for the validation of the non-linear collision effect F-P code can describe the b-b collision. To validate the effect, the following experiment was planned. D distribution function[*.e-4] D beam E=8keV co direction H beam 8keV ctr direction H beam 8keV t=ms after NB#3 off w NB#2 (balance injection) no background NB w NB# (both co-injection) energy in beam direction [kev] Preliminary simulation Focus on the slowing down process of the tangential D beam in D plasmas with tangential H beam. If D and H beam have a same direction, D beam ions are accelerated by H beam because H beam is faster than D beam. If they have different direction, D beam ions are not affected by H beam owing to the large relative velocity. H. Nuga (NIFS) Sep./27 8 / 5
9 Preliminary pre-experiment estimation The contribution of beam-beam collision can be estimated through the measurement of the neutron emission rate by D-D reaction. Focus on the decay time of neutron emission rate after D beam offs. beam energy[kev] fusion reaction rate background co- or ctr H beam short pulse D beam time[sec].6e-6.2e-6 8e-7 4e-7 beam wave form n=5e9 n=3e9 n=2e9 n=e9 n=.5e9 co beam time [sec] Evolutions of neutron emission rate It is expected that if D and H beam have a same direction, the decay time becomes longer due to the beam-beam collision. :decay time of neutron rate [sec] τd preliminary simulation result # and #3 (both co-injection) #2 and #3 (balance injection). BG co beam extendsτd τs :beam slowing down time[sec] Decay time with respect to slowing down time. H. Nuga (NIFS) Sep./27 9 / 5
10 ne[e9/m 3 ] Experiment on LHD NB#3: D co Te 6 Beam Energy[keV] Te [kev] Neutron counts [e4/s] NB#: H co- NB#2: H ctr time [sec] Example of waveform (SN37352) NB: H beam E 8keV, P port 5MW NB2: H beam E 6keV, P port 3.5MW NB3: D beam E 4keV, P port 2MW ne 3 2 (NB#2:H) E~6keV (NB#3:D) E~4keV NB injection system on LHD N-NBI (NB#: H) E~8keV Co- or ctr-direction H beam is overlapped on D beam. D beam offs at t = 4.8 sec. The decay time of neutron emission rate is investigated. H. Nuga (NIFS) Sep./27 / 5
11 Results of the decay time τ [sec] D.2. both cobalance no BG. τ [sec].2.3 s Results of decay time with respect to slowing down time. τ s τse e ln E 3/2 E 3/2 + E 3/2 C + E 3/2 C, Co-direction H beam tends to extend the decay time rather than balance-direction H beam. The differences appear clearly in long τ s region owing to the weak collisional friction. These results support that of the pre-experiment simulation. where τ se is the beam slowing down time, E C is the critical energy, E = 4 kev, and E = 5 kev satisfies: σv cx (E )/ σv cx (E ) τ cx (E )/τ cx (E ) = /e H. Nuga (NIFS) Sep./27 / 5
12 Fokker-Planck analysis using experiment data Assumptions T e = T i, n e = n i, n D /(n H + n D ) =.9 n i = n bulk i + n beam i Neutral gas profile is fixed. n n () = 4 m 3, n n () = 6 m 3 Radial transport of fast ions is ignored. Trapped particle effect is omitted (tangential beam). Contributions of fusion born H and T ions are neglected. 2 t=4.8 s 2 t=4.9 s both co-.2 balance no BG 6 6 τ D [sec] t=5. s t=5. s 6 2 SN τ [sec].2.3 s (SN37352 ρ = ) The relaxation of D beam distribution can be obtained in 2D momentum space. Distribution function of H ion is also calculated. H. Nuga (NIFS) Sep./27 2 / 5
13 Simulation of neutron emission rate (both co-injection) τ D [sec] 4 neutron counts [ /s] 4 neutron counts [ /s] both cobalance no BG SN37352 measurement short τs SN37346 SN37359 SN τ [sec].2.3 s simulation SN time [sec] measurement long τs simulation SN time [sec] R = f D (v a ) f D (v b )du a du b D-D reaction is calculated by double integration of f D obtained by F-P code. F-P simulation over estimates the neutron emission rate. The simulated decay time is longer than that of measured. Lack of fast ion loss mechanism. Typical time constants SN τ exp D [sec] τsim D τ s (ρ = ) τ s () CX loss time (τ cx () = 3.8sec, τ cx () =.69sec) is sufficiently longer than the slowing down time in the whole plasma. H. Nuga (NIFS) Sep./27 3 / 5
14 Simulation of neutron emission rate (balance injection) 4 neutron counts [ /s] 4 neutron counts [ /s] measurement short τs simulation SN time [sec] measurement long τs simulation SN time [sec] both cobalance no BG Simulation result of short τ s case has a good agreement. The value of the decay time is not matched especially in long τ s region. The extention of the decay time due to b-b collision also appears in this simulation. Typical time constants SN τ exp D [sec] τsim D τ s (ρ = ) τ s () τ D [sec].2.. τ.2 s [sec].3 It can be guessed fast ion loss plays a important role in long τ s region. τ exp + + τ D s τ cx τ EP L H. Nuga (NIFS) Sep./27 4 / 5
15 Conclusion To analyze the behavior of EPs on LHD, F-P code have been developed. To validate the code, especially b-b collision effect, a series of experiment, which focus on the beam slowing down process, was held. The b-b collision effect is estimated by the neutron emission rate. In LHD experiments, the effect of b-b collision appears clearly. F-P simulation results have same tendency. the neutron emission rate is over estimated owing to the lack of loss mechanism. H. Nuga (NIFS) Sep./27 5 / 5
Estimations of Beam-Beam Fusion Reaction Rates in the Deuterium Plasma Experiment on LHD )
Estimations of Beam-Beam Fusion Reaction Rates in the Deuterium Plasma Experiment on LHD ) Masayuki HOMMA, Sadayoshi MURAKAMI, Hideo NUGA and Hiroyuki YAMAGUCHI Department of Nuclear Engineering, Kyoto
More informationStudy of High-energy Ion Tail Formation with Second Harmonic ICRF Heating and NBI in LHD
21st IAEA Fusion Energy Conference Chengdu, China, 16-21 October, 2006 IAEA-CN-149/ Study of High-energy Ion Tail Formation with Second Harmonic ICRF Heating and NBI in LHD K. Saito et al. NIFS-851 Oct.
More informationIntegrated Heat Transport Simulation of High Ion Temperature Plasma of LHD
1 TH/P6-38 Integrated Heat Transport Simulation of High Ion Temperature Plasma of LHD S. Murakami 1, H. Yamaguchi 1, A. Sakai 1, K. Nagaoka 2, H. Takahashi 2, H. Nakano 2, M. Osakabe 2, K. Ida 2, M. Yoshinuma
More informationIntegrated Particle Transport Simulation of NBI Plasmas in LHD )
Integrated Particle Transport Simulation of NBI Plasmas in LHD Akira SAKAI, Sadayoshi MURAKAMI, Hiroyuki YAMAGUCHI, Arimitsu WAKASA, Atsushi FUKUYAMA, Kenichi NAGAOKA 1, Hiroyuki TAKAHASHI 1, Hirohisa
More informationEnergetic Ion Confinement and Lost Ion Distribution in Heliotrons
Energetic Ion Confinement and Lost Ion Distribution in Heliotrons S. Murakami, Y. Masaoka, T. Yamamot, A. Fukuyama, M. Osakabe1), K. Ida1), M. Yoshinuma1) T. Ozaki1), T. Tokuzawa1), M. Isobe1), M. Nishiura1),
More informationComparison 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 informationFast ion physics in the C-2U advanced, beam-driven FRC
Fast ion physics in the C-2U advanced, beam-driven FRC Richard Magee for the TAE Team 216 US-Japan Workshop on the Compact Torus August 23, 216! High β FRC embedded in magnetic mirror is a unique fast
More informationIon Heating Experiments Using Perpendicular Neutral Beam Injection in the Large Helical Device
Ion Heating Experiments Using Perpendicular Neutral Beam Injection in the Large Helical Device Kenichi NAGAOKA, Masayuki YOKOYAMA, Yasuhiko TAKEIRI, Katsumi IDA, Mikiro YOSHINUMA, Seikichi MATSUOKA 1),
More informationExperimental analysis and predictive simulation of heat transport using TASK3D code
Experimental analysis and predictive simulation of heat transport using TASK3D code A. Wakasa 1, A. Fukuyama 2, S. Murakami 2, N. Takeda 2, and, M. Yokoyama 3 1 Research Organization for Information Science
More informationA Method of Knock-on Tail Observation Accounting Temperature Fluctuation Using 6 Li+T/D+T Reaction in Deuterium Plasma
A Method of Knock-on Tail Observation Accounting Temperature Fluctuation Using 6 Li+T/D+T Reaction in Deuterium Plasma Yasuko KAWAMOTO and Hideaki MATSUURA Department of Applied Quantum Physics and Nuclear
More informationSawtooth mixing of alphas, knock on D, T ions and its influence on NPA spectra in ITER plasma
Sawtooth mixing of alphas, knock on D, T ions and its influence on NPA spectra in ITER plasma F.S. Zaitsev 1, 4, N.N. Gorelenkov 2, M.P. Petrov 3, V.I. Afanasyev 3, M.I. Mironov 3 1 Scientific Research
More informationSimulation Study of High-Frequency Magnetosonic Waves Excited by Energetic Ions in Association with Ion Cyclotron Emission )
Simulation Study of High-Frequency Magnetosonic Waves Excited by Energetic Ions in Association with Ion Cyclotron Emission ) Mieko TOIDA 1),KenjiSAITO 1), Hiroe IGAMI 1), Tsuyoshi AKIYAMA 1,2), Shuji KAMIO
More informationIntegrated discharge scenario for high-temperature helical plasma on LHD
IAEA-FEC 2014 St. Petersburg, Russia PPC/2-1 Integrated discharge scenario for high-temperature helical plasma on LHD K. Nagaoka National Institute for Fusion Science H. Takahashi 1, S. Murakami 3, H.
More informationFokker-Planck Simulation Study of Hot-Tail Effect on Runaway Electron Generation in ITER Disruptions )
Fokker-Planck Simulation Study of Hot-Tail Effect on Runaway Electron Generation in ITER Disruptions ) Hideo NUGA, Akinobu MATSUYAMA 1), Masatoshi YAGI 1) and Atsushi FUKUYAMA Kyoto University, Kyoto-Daigaku-Katsura,
More informationStudy of Energetic Ion Transport in the Large Helical Device
Study of Energetic Ion Transport in the Large Helical Device M. Sasao ), S. Murakami ), M. Isobe ), A.V. Krasilnikov 2), S. Iiduka 3), K. Itoh ), N. Nakajima ), M. Osakabe ), K.Saito 4),T. Seki ), Y.Takeiri
More informationFast Ion Confinement in the MST Reversed Field Pinch
Fast Ion Connement in the MST Reversed Field Pinch Gennady Fiksel B. Hudson, D.J. Den Hartog, R.M. Magee, R. O'Connell, S.C. Prager MST Team - University of Wisconsin - Madison Center for Magnetic Self-Organization
More informationSimulation Study of Interaction between Energetic Ions and Alfvén Eigenmodes in LHD
1 Simulation Study of Interaction between Energetic Ions and Alfvén Eigenmodes in LHD Y. Todo 1), N. Nakajima 1), M. Osakabe 1), S. Yamamoto 2), D. A. Spong 3) 1) National Institute for Fusion Science,
More informationThe fast-ion distribution function
The fast-ion distribution function Source Collisions Orbits RF Losses W. Heidbrink 3 MeV & 14.7 MeV protons Charge Exchange Reactivity σv Complex neutral beam sources are described by a few parameters
More informationHigh fusion performance at high T i /T e in JET-ILW baseline plasmas with high NBI heating power and low gas puffing
High fusion performance at high T i /T e in JET-ILW baseline plasmas with high NBI heating power and low gas puffing Hyun-Tae Kim, A.C.C. Sips, C. D. Challis, F. Rimini, L. Garzotti, E. Lerche, L. Frassinetti,
More informationM.Osakabe, T.Itoh1, K. Ogawa3,4, M. Isobe1,2, K. Toi1,3, T.Ido1,3, A. Shimizu1, S. Kubo1,3, K.Nagaoka1, Y.Takeiri1,2 and LHD experiment group
5th IAEA-TM on EP September 5-10, 2011 Austin, Texas M.Osakabe, T.Itoh1, K. Ogawa3,4, M. Isobe1,2, K. Toi1,3, T.Ido1,3, A. Shimizu1, S. Kubo1,3, K.Nagaoka1, Y.Takeiri1,2 and LHD experiment group 1National
More informationIntegrated Modelling and Simulation of Toroidal Plasmas
7th ITER International School on High performance computing in fusion science Aix-Marseille University, Aix-en-Provence, France 2014-08-28 Integrated Modelling and Simulation of Toroidal Plasmas Atsushi
More informationBifurcation-Like Behavior of Electrostatic Potential in LHD )
Bifurcation-Like Behavior of Electrostatic Potential in LHD ) Akihiro SHIMIZU, Takeshi IDO, Masaki NISHIURA, Ryohei MAKINO 1), Masayuki YOKOYAMA, Hiromi TAKAHASHI, Hiroe IGAMI, Yasuo YOSHIMURA, Shin KUBO,
More informationEvaluation of Anomalous Fast-Ion Losses in Alcator C-Mod
Evaluation of Anomalous Fast-Ion Losses in Alcator C-Mod S. D. Scott Princeton Plasma Physics Laboratory In collaboration with R. Granetz, D. Beals, M. Greenwald MIT PLASMA Science and Fusion Center W.
More informationModelling of JT-60U Detached Divertor Plasma using SONIC code
J. Plasma Fusion Res. SERIES, Vol. 9 (2010) Modelling of JT-60U Detached Divertor Plasma using SONIC code Kazuo HOSHINO, Katsuhiro SHIMIZU, Tomonori TAKIZUKA, Nobuyuki ASAKURA and Tomohide NAKANO Japan
More informationMonte Carlo Collisions in Particle in Cell simulations
Monte Carlo Collisions in Particle in Cell simulations Konstantin Matyash, Ralf Schneider HGF-Junior research group COMAS : Study of effects on materials in contact with plasma, either with fusion or low-temperature
More information1 EX/C4-3. Increased Understanding of Neoclassical Internal Transport Barrier on CHS
EX/C-3 Increased Understanding of Neoclassical Internal Transport Barrier on CHS T.Minami, A.Fujisawa, H.Iguchi, Y.Liang, K.Ida, S.Nishimura, M.Yokoyama, S.Murakami, Y.Yoshimura, M.Isobe, C.Suzuki, I.Nomura,
More informationPlasma Spectroscopy Inferences from Line Emission
Plasma Spectroscopy Inferences from Line Emission Ø From line λ, can determine element, ionization state, and energy levels involved Ø From line shape, can determine bulk and thermal velocity and often
More informationFinite-Orbit-Width Effect and the Radial Electric Field in Neoclassical Transport Phenomena
1 TH/P2-18 Finite-Orbit-Width Effect and the Radial Electric Field in Neoclassical Transport Phenomena S. Satake 1), M. Okamoto 1), N. Nakajima 1), H. Sugama 1), M. Yokoyama 1), and C. D. Beidler 2) 1)
More informationEnergetic-Ion Driven Alfvén Eigenmodes in Large Helical Device Plasmas with Three-Dimensional Structure and Their Impact on Energetic Ion Transport
Energetic-Ion Driven Alfvén Eigenmodes in Large Helical Device Plasmas with Three-Dimensional Structure and Their Impact on Energetic Ion Transport K. Toi, S. Yamamoto 1), N. Nakajima, S. Ohdachi, S. Sakakibara,
More informationCorrelations of ELM frequency with pedestal plasma characteristics
cpp header will be provided by the publisher Correlations of ELM frequency with pedestal plasma characteristics G. Kamberov 1 and L. Popova 2 1 Stevens Institute of Technology, Hoboken NJ, USA 2 Institute
More informationHeating and Current Drive by Electron Cyclotron Waves in JT-60U
EX/W- Heating and Current Drive by Electron Cyclotron Waves in JT-6U T. Suzuki ), S. Ide ), C. C. Petty ), Y. Ikeda ), K. Kajiwara ), A. Isayama ), K. Hamamatsu ), O. Naito ), M. Seki ), S. Moriyama )
More informationPlasma collisions and conductivity
e ion conductivity Plasma collisions and conductivity Collisions in weakly and fully ionized plasmas Electric conductivity in non-magnetized and magnetized plasmas Collision frequencies In weakly ionized
More informationNonlinear Simulation of Energetic Particle Modes in JT-60U
TH/P6-7 Nonlinear Simulation of Energetic Particle Modes in JT-6U A.Bierwage,N.Aiba 2, K.Shinohara 2, Y.Todo 3,W.Deng 4,M.Ishikawa 2,G.Matsunaga 2 and M. Yagi Japan Atomic Energy Agency (JAEA), Rokkasho,
More informationModeling of Negative Ion Transport in Cesium-Seeded Volume Negative Ion Sources
Modeling of Negative Ion Transport in Cesium-Seeded Volume Negative Ion Sources Osamu Fukumasa and Ryo Nishida Department of Electrical and Electronic Engineering, Faculty of Engineering, Yamaguchi University,
More informationSimulation of alpha particle current drive and heating in spherical tokamaks
Simulation of alpha particle current drive and heating in spherical tokamaks R. Farengo 1, M. Zarco 1, H. E. Ferrari 1, 1 Centro Atómico Bariloche and Instituto Balseiro, Argentina. Consejo Nacional de
More informationPlasma and Fusion Research: Regular Articles Volume 10, (2015)
Possibility of Quasi-Steady-State Operation of Low-Temperature LHD-Type Deuterium-Deuterium (DD) Reactor Using Impurity Hole Phenomena DD Reactor Controlled by Solid Boron Pellets ) Tsuguhiro WATANABE
More informationStudies on Neutral Beam Ion Confinement and MHD Induced Fast-Ion. Loss on HL-2A Tokamak
Studies on Neutral Beam Ion Confinement and MHD Induced Fast-Ion Loss on HL-A Tokamak LIU Yi, ISOBE Mitsutaka, PENG Xiao-Dong, Wang Hao, JI Xiao-Quan, CHEN Wei, ZHANG Yi-Po, Dong Yun-Bo, MORITA Shigeru
More informationEUV 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 informationCharacteristics of Energetic-Ion-Driven Geodesic Acoustic Modes in the Large Helical Device(LHD)
O-4 12 th IAEA TM on Energetic Particles in Magnetic Confinement Systems, 7-10 Sep, Austin, USA Characteristics of Energetic-Ion-Driven Geodesic Acoustic Modes in the Large Helical Device(LHD) K. Toi,
More informationQuantification of the contribution of processes in the ADAS beam model
Quantification of the contribution of processes in the ADAS beam model Martin O Mullane Hugh Summers, Stuart Henderson, Ephrem Delabie, Manfred Von Hellermann and many ADAS contributors Motivation and
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 informationEdge and Internal Transport Barrier Formations in CHS. Identification of Zonal Flows in CHS and JIPPT-IIU
Edge and Internal Transport Barrier Formations in CHS S. Okamura, T. Minami, T. Akiyama, T. Oishi, A. Fujisawa, K. Ida, H. Iguchi, M. Isobe, S. Kado, K. Nagaoka, K. Nakamura, S. Nishimura, K. Matsuoka,
More informationParticle Pinch Model of Passing/Trapped High-Z Impurity with Centrifugal Force Effect )
Particle Pinch Model of Passing/Trapped High-Z Impurity with Centrifugal Force Effect ) Yusuke SHIMIZU, Takaaki FUJITA, Atsushi OKAMOTO, Hideki ARIMOTO, Nobuhiko HAYASHI 1), Kazuo HOSHINO 2), Tomohide
More informationGenerating of fusion plasma neutron source with AFSI for Serpent MC neutronics computing Serpent UGM 2015 Knoxville, TN,
Generating of fusion plasma neutron source with AFSI for Serpent MC neutronics computing Serpent UGM 2015 Knoxville, TN, 14.10.2015 Paula Sirén VTT Technical Research Centre of Finland, P.O Box 1000, 02044
More informationCore and edge toroidal rotation study in JT-60U
Core and edge toroidal rotation study in JT-6U Japan Atomic Energy Agency M. Yoshida, Y. Sakamoto, M. Honda, Y. Kamada, H. Takenaga, N. Oyama, H. Urano, and the JT-6 team JT-6U EXC/3-2 1 23rd IAEA Fusion
More informationLow Temperature Plasma Technology Laboratory
Low Temperature Plasma Technology Laboratory CENTRAL PEAKING OF MAGNETIZED GAS DISCHARGES Francis F. Chen and Davide Curreli LTP-1210 Oct. 2012 Electrical Engineering Department Los Angeles, California
More informationAdditional Heating Experiments of FRC Plasma
Additional Heating Experiments of FRC Plasma S. Okada, T. Asai, F. Kodera, K. Kitano, T. Suzuki, K. Yamanaka, T. Kanki, M. Inomoto, S. Yoshimura, M. Okubo, S. Sugimoto, S. Ohi, S. Goto, Plasma Physics
More informationMultifarious Physics Analyses of the Core Plasma Properties in a Helical DEMO Reactor FFHR-d1
1 FTP/P7-34 Multifarious Physics Analyses of the Core Plasma Properties in a Helical DEMO Reactor FFHR-d1 J. Miyazawa 1, M. Yokoyama 1, Y. Suzuki 1, S. Satake 1, R. Seki 1, Y. Masaoka 2, S. Murakami 2,
More informationIntegrated Transport Simulation Aiming at Burning Plasmas
Workshop on Transport and Confinement NIFS University, 2006/11/09 Integrated Transport Simulation Aiming at Burning Plasmas A. Fukuyama and M. Honda Department of Nuclear Engineering, Kyoto University
More informationConfinement of toroidal non-neutral plasma in Proto-RT
Workshop on Physics with Ultra Slow Antiproton Beams, RIKEN, March 15, 2005 Confinement of toroidal non-neutral plasma in Proto-RT H. Saitoh, Z. Yoshida, and S. Watanabe Graduate School of Frontier Sciences,
More informationConfinement of toroidal non-neutral plasma in Proto-RT
Workshop on Physics with Ultra Slow Antiproton Beams, RIKEN, March 15, 2005 Confinement of toroidal non-neutral plasma in Proto-RT H. Saitoh, Z. Yoshida, and S. Watanabe Graduate School of Frontier Sciences,
More informationHIGH PERFORMANCE EXPERIMENTS IN JT-60U REVERSED SHEAR DISCHARGES
HIGH PERFORMANCE EXPERIMENTS IN JT-U REVERSED SHEAR DISCHARGES IAEA-CN-9/EX/ T. FUJITA, Y. KAMADA, S. ISHIDA, Y. NEYATANI, T. OIKAWA, S. IDE, S. TAKEJI, Y. KOIDE, A. ISAYAMA, T. FUKUDA, T. HATAE, Y. ISHII,
More informationEnergetic-Ion-Driven MHD Instab. & Transport: Simulation Methods, V&V and Predictions
Energetic-Ion-Driven MHD Instab. & Transport: Simulation Methods, V&V and Predictions 7th APTWG Intl. Conference 5-8 June 2017 Nagoya Univ., Nagoya, Japan Andreas Bierwage, Yasushi Todo 14.1MeV 10 kev
More informationIon orbits and ion confinement studies on ECRH plasmas in TJ-II stellarator
Ion orbits and ion confinement studies on ECRH plasmas in TJ-II stellarator F. Castejón 1,4, J. M. Reynolds 3,4, J. M. Fontdecaba 1, D. López-Bruna 1, R. Balbín 1, J. Guasp 1, D. Fernández-Fraile 2, L.
More informationISOTOPE EFFECTS ON CONFINEMENT AND TURBULENCE IN ECRH PLASMA OF LHD
K. TANAKA et al, ISOTOPE EFFECTS ON CONFINEMENT AND TURBULENCE IN ECRH PLASMA OF LHD K. TANAKA National Institute for Fusion Science, National Institutes on Natural Sciences Toki, Japan Email: ktanaka@nifs.ac.jp
More informationEnergetic Particle Physics in Tokamak Burning Plasmas
Energetic Particle Physics in Tokamak Burning Plasmas presented by C. Z. (Frank) Cheng in collaboration with N. N. Gorelenkov, G. J. Kramer, R. Nazikian, E. Fredrickson, Princeton Plasma Physics Laboratory
More informationICRF Minority-Heated Fast-Ion Distributions on the Alcator C-Mod: Experiment and Simulation
ICRF Minority-Heated Fast-Ion Distributions on the Alcator C-Mod: Experiment and Simulation A. Bader 1, P. Bonoli 1, R. Granetz 1, R.W. Harvey 2, E.F. Jaeger 3, R. Parker 1, S. Wukitch 1. 1)MIT-PSFC, Cambridge,
More informationFluid Equations for Rarefied Gases
1 Fluid Equations for Rarefied Gases Jean-Luc Thiffeault Department of Applied Physics and Applied Mathematics Columbia University http://plasma.ap.columbia.edu/~jeanluc 21 May 2001 with E. A. Spiegel
More informationFokker-Planck Modelling of NBI deuterons in ITER
Fokker-Planck Modelling of NBI deuterons in ITER V. Yavorskij 1,2), K. Schoepf 1), V. Goloborod ko 1,2), M. Cecconello 3,4), L.G. Eriksson 5), M. Khan 1), V. Kiptily 3), A. Korotkov 3), A. Polevoi 6),
More informationFluid Equations for Rarefied Gases
1 Fluid Equations for Rarefied Gases Jean-Luc Thiffeault Department of Applied Physics and Applied Mathematics Columbia University http://plasma.ap.columbia.edu/~jeanluc 23 March 2001 with E. A. Spiegel
More informationRelevant spatial and time scale in tokamaks. F. Bombarda ENEA-Frascati, FSN-FUSPHY-SAD
Relevant spatial and time scale in tokamaks F. Bombarda ENEA-Frascati, FSN-FUSPHY-SAD PolFusion - one day discussion Meeting, 23rd of July 2015 Ferrara Ignitor News MoU of April 2010 concerned the construction
More informationFundamentals of Plasma Physics Transport in weakly ionized plasmas
Fundamentals of Plasma Physics Transport in weakly ionized plasmas APPLAuSE Instituto Superior Técnico Instituto de Plasmas e Fusão Nuclear Luís L Alves (based on Vasco Guerra s original slides) 1 As perguntas
More informationDynamics of ion internal transport barrier in LHD heliotron and JT-60U tokamak plasmas
Dynamics of ion internal transport barrier in LHD heliotron and JT-60U tokamak plasmas K. Ida 1), Y. Sakamoto 2), M. Yoshinuma 1), H. Takenaga 2), K. Nagaoka 1), N. Oyama 2), M. Osakabe 1), M. Yokoyama
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 informationCharacteristics of Internal Transport Barrier in JT-60U Reversed Shear Plasmas
Characteristics of Internal Transport Barrier in JT-6U Reversed Shear Plasmas Y. Sakamoto, Y. Kamada, S. Ide, T. Fujita, H. Shirai, T. Takizuka, Y. Koide, T. Fukuda, T. Oikawa, T. Suzuki, K. Shinohara,
More informationParticle Transport and Density Gradient Scale Lengths in the Edge Pedestal
Particle Transport and Density Gradient Scale Lengths in the Edge Pedestal W. M. Stacey Fusion Research Center, Georgia Institute of Technology, Atlanta, GA, USA Email: weston.stacey@nre.gatech.edu Abstract
More informationHeating and Confinement Study of Globus-M Low Aspect Ratio Plasma
EX/P5- Heating and Confinement Study of Globus-M Low Aspect Ratio Plasma N.V. Sakharov ), V.V. Dyachenko ), B.B. Ayushin ), A.V. Bogomolov ), F.V. Chernyshev ), V.K. Gusev ), S.A. Khitrov ), N.A. Khromov
More informationDOPPLER RESONANCE EFFECT ON ROTATIONAL DRIVE BY ION CYCLOTRON MINORITY HEATING
DOPPLER RESONANCE EFFECT ON ROTATIONAL DRIVE BY ION CYCLOTRON MINORITY HEATING V.S. Chan, S.C. Chiu, Y.A. Omelchenko General Atomics, San Diego, CA, U.S.A. 43rd Annual APS Division of Plasma Physics Meeting
More information1 EX/P7-12. Transient and Intermittent Magnetic Reconnection in TS-3 / UTST Merging Startup Experiments
1 EX/P7-12 Transient and Intermittent Magnetic Reconnection in TS-3 / UTST Merging Startup Experiments Y. Ono 1), R. Imazawa 1), H. Imanaka 1), T. Hayamizu 1), M. Inomoto 1), M. Sato 1), E. Kawamori 1),
More informationPredicting the Rotation Profile in ITER
Predicting the Rotation Profile in ITER by C. Chrystal1 in collaboration with B. A. Grierson2, S. R. Haskey2, A. C. Sontag3, M. W. Shafer3, F. M. Poli2, and J. S. degrassie1 1General Atomics 2Princeton
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 informationInnovative Concepts Workshop Austin, Texas February 13-15, 2006
Don Spong Oak Ridge National Laboratory Acknowledgements: Jeff Harris, Hideo Sugama, Shin Nishimura, Andrew Ware, Steve Hirshman, Wayne Houlberg, Jim Lyon Innovative Concepts Workshop Austin, Texas February
More informationMagnetic Field Configuration Dependence of Plasma Production and Parallel Transport in a Linear Plasma Device NUMBER )
Magnetic Field Configuration Dependence of Plasma Production and Parallel Transport in a Linear Plasma Device NUMBER ) Daichi HAMADA, Atsushi OKAMOTO, Takaaki FUJITA, Hideki ARIMOTO, Katsuya SATOU and
More informationUltra-Cold Plasma: Ion Motion
Ultra-Cold Plasma: Ion Motion F. Robicheaux Physics Department, Auburn University Collaborator: James D. Hanson This work supported by the DOE. Discussion w/ experimentalists: Rolston, Roberts, Killian,
More informationCollisional radiative model
Lenka Dosoudilová Lenka Dosoudilová 1 / 14 Motivation Equations Approximative models Emission coefficient Particles J ij = 1 4π n j A ij hν ij, atoms in ground state atoms in excited states resonance metastable
More informationTURBULENT 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 informationAnalysis and modelling of MHD instabilities in DIII-D plasmas for the ITER mission
Analysis and modelling of MHD instabilities in DIII-D plasmas for the ITER mission by F. Turco 1 with J.M. Hanson 1, A.D. Turnbull 2, G.A. Navratil 1, C. Paz-Soldan 2, F. Carpanese 3, C.C. Petty 2, T.C.
More informationContents Motivation Particle In Cell Method Projects Plasma and Ion Beam Simulations
PIC Method for Numerical Simulation Ninad Joshi NNP Group 1 Contents Motivation Particle In Cell Method Projects Plasma and Ion Beam Simulations Motivation 3 Particle simulation Ion beams and Plasmas Accelerators
More informationA neoclassical model for toroidal rotation and the radial electric field in the edge pedestal. W. M. Stacey
A neoclassical model for toroidal rotation and the radial electric field in the edge pedestal W. M. Stacey Fusion Research Center Georgia Institute of Technology Atlanta, GA 30332, USA October, 2003 ABSTRACT
More informationResearch of Basic Plasma Physics Toward Nuclear Fusion in LHD
Research of Basic Plasma Physics Toward Nuclear Fusion in LHD Akio KOMORI and LHD experiment group National Institute for Fusion Science, Toki, Gifu 509-5292, Japan (Received 4 January 2010 / Accepted
More informationNonlinear MHD effects on TAE evolution and TAE bursts
Nonlinear MHD effects on TAE evolution and TAE bursts Y. Todo (NIFS) collaborating with H. L. Berk and B. N. Breizman (IFS, Univ. Texas) GSEP 3rd Annual Meeting (remote participation / Aug. 9-10, 2010)
More informationEffect of secondary beam neutrals on MSE: theory
Effect of secondary beam neutrals on MSE: theory S. Scott (PPPL) J. Ko, I. Hutchinson (PSFC/MIT) H. Yuh (Nova Photonics) Poster NP8.87 49 th Annual Meeting, DPP-APS Orlando, FL November 27 Abstract A standard
More informationEdge Momentum Transport by Neutrals
1 TH/P3-18 Edge Momentum Transport by Neutrals J.T. Omotani 1, S.L. Newton 1,2, I. Pusztai 1 and T. Fülöp 1 1 Department of Physics, Chalmers University of Technology, 41296 Gothenburg, Sweden 2 CCFE,
More informationSimulation Research on disruptions and runaway electrons
第 20 回 NEXT 研究会 Simulation Research on disruptions and runaway electrons A. Matsuyama, M. Yagi, H. Nuga, N. Aiba, and Y. Ishii JAEA, Rokkasho, Japan Acknowledgement: Y. Shibata, A. Ito, M. Furukawa, S.
More informationDevelopment of LH wave fullwave simulation based on FEM
Development of LH wave fullwave simulation based on FEM S. Shiraiwa and O. Meneghini on behalf of LHCD group of Alacator C-Mod PSFC, MIT 2010/03/10 San-Diego, CA Special acknowledgements : R. Parker, P.
More informationEnergetic particle modes: from bump on tail to tokamak plasmas
Energetic particle modes: from bump on tail to tokamak plasmas M. K. Lilley 1 B. N. Breizman 2, S. E. Sharapov 3, S. D. Pinches 3 1 Physics Department, Imperial College London, London, SW7 2AZ, UK 2 IFS,
More informationRecent Development of LHD Experiment. O.Motojima for the LHD team National Institute for Fusion Science
Recent Development of LHD Experiment O.Motojima for the LHD team National Institute for Fusion Science 4521 1 Primary goal of LHD project 1. Transport studies in sufficiently high n E T regime relevant
More informationFIG. 1. "Flower-like" configuration of filaments used for modelling. Magnetic field values for this configuration can be described analytically. Induc
Ion Motion Modelling within Dynamic Filamentary PF-Pinch Column A. Gaψlkowski 1), A. Pasternak 2), M. Sadowski 2) 1) Institute of Plasma Physics and Laser Microfusion, Warsaw, Poland 2) The Andrzej Soltan
More informationCHARGE EXCHANGE IN SLOW COLLISIONS OF IONS WITH HYDROGEN ISOTOPES. ADIABATIC APPROACH Inga Yu. Tolstikhina
CHARGE EXCHANGE IN SLOW COLLISIONS OF IONS WITH HYDROGEN ISOTOPES. ADIABATIC APPROACH Inga Yu. Tolstikhina P.N.Lebedev Physical Institute, Russian Academy of Sciences Moscow, Russia Theoretical approaches
More informationEnergy Dependence of Neutron Flux
Energy Dependence of Neutron Flux B. Rouben McMaster University Course EP 4D03/6D03 Nuclear Reactor Analysis (Reactor Physics) 2015 Sept.-Dec. 2015 September 1 Contents We start the discussion of the energy
More informationGA A THERMAL ION ORBIT LOSS AND RADIAL ELECTRIC FIELD IN DIII-D by J.S. degrassie, J.A. BOEDO, B.A. GRIERSON, and R.J.
GA A27822 THERMAL ION ORBIT LOSS AND RADIAL ELECTRIC FIELD IN DIII-D by J.S. degrassie, J.A. BOEDO, B.A. GRIERSON, and R.J. GROEBNER JUNE 2014 DISCLAIMER This report was prepared as an account of work
More informationHeating and current drive: Radio Frequency
Heating and current drive: Radio Frequency Dr Ben Dudson Department of Physics, University of York Heslington, York YO10 5DD, UK 13 th February 2012 Dr Ben Dudson Magnetic Confinement Fusion (1 of 26)
More informationRecombination and Decay of Plasma Produced by Washer Stacked Plasma Gun inside a Curved Vacuum Chamber
Recombination and Decay of Plasma Produced by Washer Stacked Plasma Gun inside N C Sasini *, R Paikaray **, G S Sahoo ** * Department of Physics, G C College, Ramachandrapur, Jajpur, Odisha-755032, India
More informationPhysics-based Investigation of Negative Ion Behavior in a Negativeion-rich Plasma using Integrated Diagnostics
Physics-based Investigation of Negative Ion Behavior in a Negativeion-rich Plasma using Integrated Diagnostics K. Tsumori 1,2, Y. Takeiri 1,2, K. Ikeda 1, H. Nakano 1,2, S. Geng 2, M. Kisaki 1, M. Wada
More informationRotation Speed Differences of Impurity Species in the DIII-D Tokamak and Comparison with Neoclassical Theory
Rotation Speed Differences of Impurity Species in the DIII-D Tokamak and Comparison with Neoclassical Theory L.R. Baylor, K.H. Burrell*, R.J. Groebner*, D.R. Ernst #, W.A. Houlberg, M. Murakami, and The
More informationModelling of plasma edge turbulence with neutrals
Modelling of plasma edge turbulence with neutrals Ben Dudson 1 1 York Plasma Institute, Department of Physics, University of York, Heslington, York YO1 5DD, UK 7 th IAEA TM on Plasma Instabilities 4-6
More information12. MHD Approximation.
Phys780: Plasma Physics Lecture 12. MHD approximation. 1 12. MHD Approximation. ([3], p. 169-183) The kinetic equation for the distribution function f( v, r, t) provides the most complete and universal
More informationExperimental Evidence of Inward Momentum Pinch on JET and Comparison with Theory
Experimental Evidence of Inward Momentum Pinch on JET and Comparison with Theory Tuomas Tala, Association Euratom-Tekes, VTT, Finland JET-EFDA Culham Science Centre Abingdon, UK 22nd IAEA Fusion Energy
More informationImpact of Energetic-Ion-Driven Global Modes on Toroidal Plasma Confinements
Impact of Energetic-Ion-Driven Global Modes on Toroidal Plasma Confinements Kazuo TOI CHS & LHD Experimental Group National Institute for Fusion Science Toki 59-5292, Japan Special contributions from:
More informationFusion neutron production with deuterium neutral beam injection and enhancement of energetic-particle physics study in the Large Helical Device
15 th IAEA Technical Meeting on Energetic Particles in Magnetic Confinement Systems, 5-8 September, PPPL Session 8 : Diagnostic Development : O-14 Fusion neutron production with deuterium neutral beam
More information