Enhancement of Energetic-Electron Population During Magnetic Reconnection Associated with Strong Tearing Mode in Non-Disruptive HL-2A Plasmas

被引：0
作者：
Yang, Q. -L. [1 ]
Chen, W. [1 ]
Yu, L. -m. [1 ]
Shi, P. -w. [1 ]
Ji, X. -q. [1 ]
Shi, Zh. -B. [1 ]
机构：
[1] Southwest Inst Phys, POB 432, Chengdu 610041, Peoples R China
来源：
PLASMA PHYSICS REPORTS | 2023年 / 49卷 / 11期
基金：
中国国家自然科学基金;
关键词：
magnetic reconnection; energetic electron; tearing mode; energy distribution; ACCELERATION;
D O I：
10.1134/S1063780X22602127
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：
Laboratory observations of enhancements of energetic-electron population are presented during magnetic reconnection associated with strong tearing mode in non-disruptive tokamak plasmas. The hardX-ray (HXR) spectrum detected by cadmium-telluride (CdTe) scintillator detectors and the non-thermal radiation measured by the electron cyclotron emission (ECE) are used to analyze the behaviors of energ eticelectrons on HL-2A. A population of energetic electrons is generated by parallel electric fields during mag-netic reconnection, which is evidenced by the production of hard X-rays with energy 10 keV < E gamma < 200 keV. The results could assist to better understand the acceleration mechanism of electrons in the parameter-regime of tokamak plasma. It is observed that the energetic-electrons jointly accelerated by Ohmic electric fields and parallel electric fields have significant effects on the behaviors of low frequency MHD modes, namely, which excite Alfv & eacute;nic and acoustic type instabilities during strong tearing modes (TMs)
引用
收藏
页码：1243 / 1250
页数：8
相关论文
共 22 条
  • [1] Bateman G., 1978, MHD INSTABILITIES
  • [2] Continuous Spectrum of Shear Alfven Waves within Magnetic Islands
    Biancalani, Alessandro
    Chen, Liu
    Pegoraro, Francesco
    Zonca, Fulvio
    [J]. PHYSICAL REVIEW LETTERS, 2010, 105 (09)
  • [3] Observation of high-frequency waves during strong tearing mode activity in FTU plasmas without fast ions
    Buratti, P
    Smeulders, P
    Zonca, F
    Annibaldi, SV
    De Benedetti, M
    Kroegler, H
    Regnoli, G
    Tudisco, O
    [J]. NUCLEAR FUSION, 2005, 45 (11) : 1446 - 1450
  • [4] Observation of energetic electrons within magnetic islands
    Chen, L. -J.
    Bhattacharjee, A.
    Puhl-Quinn, P. A.
    Yang, H.
    Bessho, N.
    Imada, S.
    Muehlbachler, S.
    Daly, P. W.
    Lefebvre, B.
    Khotyaintsev, Y.
    Vaivads, A.
    Fazakerley, A.
    Georgescu, E.
    [J]. NATURE PHYSICS, 2008, 4 (01) : 19 - 23
  • [5] Destabilization of beta-induced Alfven eigenmodes in the HL-2A tokamak
    Chen, W.
    Ding, X. T.
    Liu, Yi.
    Yang, Q. W.
    Ji, X. Q.
    Yuan, G. L.
    Zhang, Y. P.
    Isobe, M.
    Dong, Y. B.
    Huang, Y.
    Zhou, J.
    Zhou, Y.
    Li, W.
    Feng, B. B.
    Song, X. M.
    Dong, J. Q.
    Shi, Z. B.
    Duan, X. R.
    [J]. NUCLEAR FUSION, 2011, 51 (06)
  • [6] Chen W., 2012, Plasma Fusion Res., V7
  • [7] Investigation of Beta-Induced Alfven Eigenmode during Strong Tearing Mode Activity in the HL-2A Tokamak
    Chen Wei
    Ji Xiaoquan
    Yang Qingwei
    Ding Xuantong
    Liu Yi
    Feng Beibin
    Huang Yuang
    Li Wei
    Zhou Yan
    Zhou Jun
    Song Xianming
    Li Liancai
    Duan Xuru
    [J]. JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2010, 79 (04)
  • [8] Electron acceleration from contracting magnetic islands during reconnection
    Drake, J. F.
    Swisdak, M.
    Che, H.
    Shay, M. A.
    [J]. NATURE, 2006, 443 (7111) : 553 - 556
  • [9] Production of energetic electrons during magnetic reconnection
    Drake, JF
    Shay, MA
    Thongthai, W
    Swisdak, M
    [J]. PHYSICAL REVIEW LETTERS, 2005, 94 (09)
  • [10] ELECTRON AND ION RUNAWAY IN A FULLY IONIZED GAS .2.
    DREICER, H
    [J]. PHYSICAL REVIEW, 1960, 117 (02): : 329 - 342
123