Investigation of gas puff induced fluctuation suppression in ADITYA tokamak

被引:25
|
作者
Jha, R. [1 ]
Sen, A. [1 ]
Kaw, P. K. [1 ]
Atrey, P. K. [1 ]
Bhatt, S. B. [1 ]
Bisai, N. [1 ]
Tahiliani, K. [1 ]
Tanna, R. L. [1 ]
机构
[1] Inst Plasma Res, Bhat 382428, Gandhinagar, India
关键词
STATIONARY PLASMA ENERGY; STRONG EDGE RADIATION; H-MODE; HIGH CONFINEMENT; REYNOLDS STRESS; HIGH-DENSITY; DIII-D; TRANSPORT; TURBULENCE; DISCHARGES;
D O I
10.1088/0741-3335/51/9/095010
中图分类号
O35 [流体力学]; O53 [等离子体物理学];
学科分类号
070204 ; 080103 ; 080704 ;
摘要
An experiment aimed at investigating the cause of fluctuation suppression by gas puffing in the edge and scrape-off layer plasma of the ADITYA tokamak is reported. The fluctuation suppression is accompanied by a flattening of the radial profiles of the floating potential, plasma density and electrostatic Reynolds stress. Both the fluctuation suppression and the simultaneous reduction in particle flux occur throughout the observed region of the plasma edge. The bolometer data also show an increase in the edge radiation from 20% to 40% of the input power during the gas puff. These results indicate a significant role of edge cooling in the fluctuation suppression mechanism and are shown to be well explained in terms of a concomitant reduction in the growth rate of the interchange instability associated with the electron temperature gradient.
引用
收藏
页数:17
相关论文
共 50 条
  • [31] Gas puff imaging system for edge plasma fluctuation measurements in large helical device
    Kobayashi, M.
    Ohdachi, S.
    Xu, Y.
    Li, W.
    Shimizu, A.
    Cheng, J.
    REVIEW OF SCIENTIFIC INSTRUMENTS, 2022, 93 (09):
  • [32] NUMERICAL MODELING OF A MAGNETICALLY INDUCED COMPRESSION GAS PUFF
    BADAYE, M
    GUPTA, RP
    PHYSICS OF FLUIDS B-PLASMA PHYSICS, 1993, 5 (03): : 1002 - 1013
  • [33] Development of a multi-color gas puff imaging diagnostic on HL-2A tokamak
    Yuan, B. D.
    Yu, Y.
    He, R. C.
    Yang, X. Y.
    Xu, T. C.
    Yuan, J. B.
    Hong, R. J.
    Nie, L.
    Ke, R.
    Long, T.
    Wang, Z. H.
    Xiao, C. J.
    Xu, M.
    Li, J. Q.
    Ye, M. Y.
    Duan, X. R.
    REVIEW OF SCIENTIFIC INSTRUMENTS, 2020, 91 (07):
  • [34] Gas puff imaging measurements during resonant magnetic perturbations on the HL-2A tokamak
    Yuan, J. B.
    Xu, M.
    Yu, Y.
    Yuan, B. D.
    Nie, L.
    Wang, Z. H.
    Sun, T. F.
    Wu, T.
    Ke, R.
    Long, T.
    Gong, S. B.
    Ji, X. Q.
    Li, J. Q.
    NUCLEAR FUSION, 2023, 63 (12)
  • [35] Characterisation of induced vessel current during Mirnov probe calibration experiment in ADITYA-U tokamak
    Kumar, Rohit
    Ghosh, J.
    Tanna, R. L.
    Aich, Suman
    Macwan, Tanmay
    Jha, S. K.
    FUSION ENGINEERING AND DESIGN, 2021, 166
  • [36] MHD activity induced coherent mode excitation in the edge plasma region of ADITYA-U tokamak
    Singh, Kaushlender
    Dolui, Suman
    Hegde, Bharat
    Lachhvani, Lavkesh
    Patel, Sharvil
    Hoque, Injamul
    Kumawat, Ashok K.
    Kumar, Ankit
    Macwan, Tanmay
    Raj, Harshita
    Banerjee, Soumitra
    Yadav, Komal
    Kanik, Abha
    Gautam, Pramila
    Kumar, Rohit
    Aich, Suman
    Pradhan, Laxmikanta
    Patel, Ankit
    Galodiya, Kalpesh
    Raju, Daniel
    Kumar, Sameer
    Jadeja, K. A.
    Patel, K. M.
    Pandya, S. N.
    Chaudhary, M. B.
    Tanna, R. L.
    Chattopadhyay, P. K.
    Pal, R.
    Saxena, Y. C.
    Sen, Abhijit
    Ghosh, Joydeep
    PHYSICS OF PLASMAS, 2024, 31 (09)
  • [37] Measurements of the fluctuation-induced flux with emissive probes in the CASTOR Tokamak
    Schrittwieser, R
    Adámek, J
    Balan, P
    Duran, I
    Hron, M
    Ionita, C
    Martines, E
    Stöckel, J
    Tichy, M
    Van Oost, G
    PLASMA PHYSICS, 2003, 669 : 207 - 210
  • [38] MEASUREMENT OF MAGNETIC FLUCTUATION-INDUCED ENERGY-TRANSPORT IN A TOKAMAK
    FIKSEL, G
    PRAGER, SC
    PRIBYL, P
    TAYLOR, RJ
    TYNAN, GR
    PHYSICAL REVIEW LETTERS, 1995, 75 (21) : 3866 - 3869
  • [39] Determination of the mass distribution in a gas puff by laser induced fluorescence
    Garate, E
    Song, YX
    Fisher, A
    PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS, 2003, : 789 - 792
  • [40] Numerical investigation of Tokamak runaway current suppression by using massive deuterium-argon/neon gas mixture injection
    Zhenzhe, Han
    Pingwei, Zheng
    He Jishu/Nuclear Techniques, 2024, 47 (08):