HL-2A装置SDD软X射线PHA阵列实验结果

核聚变与等离子体物理 ›› 2010, Vol. 30 ›› Issue (2): 97-102.

• 等离子体物理学 • 下一篇

HL-2A装置SDD软X射线PHA阵列实验结果

张轶泼，刘仪，杨进蔚，宋先瑛，李旭，袁国梁，潘传红

(核工业西南物理研究院，成都 610041)

收稿日期:2009-08-03 修回日期:2010-02-10 出版日期:2010-06-15 发布日期:2010-06-03
作者简介:张轶泼(1980-)，男，河南西平人，核工业西南物理研究院在读博士研究生，研究方向：受控核聚变等离子体物理实验与诊断。
基金资助:
国家自然科学基金资助项目(10675124)

Experimental results from SDD soft X-ray PHA array on the HL-2A tokamak

ZHANG Yi-po,LIU Yi,YANG Jin-wei,SONG Xian-ying,LI Xu,YUAN Guo-liang,PAN Chan-hong

(Southwestern Institute of Physics, Chengdu 610041)

Received:2009-08-03 Revised:2010-02-10 Online:2010-06-15 Published:2010-06-03

摘要/Abstract

摘要： 用软X射线脉冲高度分析(PHA)阵列系统获得了等离子体的电子温度剖面和电子速率分布的时间演化。测量结果表明，电子温度剖面在OH阶段较平缓，接近抛物线1.0×[1-(r/a)²]²分布；而在ECRH(功率0.8MW)阶段，等离子体中心(z＝0)电子温度上升了0.6keV，边缘(z＝30cm)处只上升了0.1keV，反映出ECRH功率沉积在等离子体中心区域；在ECRH期间有大量的高能电子产生，因而电子速率分布在ECRH期间显著改变；等离子体中心的高能电子的数量和能量都比等离子体边缘的增加更大，ECRH(～0.8MW)期间等离子体中心(z＝0)产生的高能电子的能量可达17keV。分析表明：在ECRH(纵场B_t=1.3T)放电期间，ECRH加热效果显著，ECRH的功率主要沉积在等离子体中心附近；电子温度剖面在ECRH阶段较OH阶段峰化；ECRH期间有大量的高能电子产生，电子速率分布被改变成为非麦克斯韦分布。

关键词: 软X射线脉冲高度分析, 硅漂移探测器, 电子温度分布, 电子速率分布, ECRH

Abstract: The time evolution of electron temperature (T_e) profile and electron velocity distribution can be obtained by means of the new soft X-ray pulse height analysis(PHA) array system. Preliminary experimental results obtained from the PHA system show that the T_e profile during ohmic heating (OH) phase is correspondingly flat, and close to the analogical parabola form of 1.0×[1-(r/a)²]²; the T_e profile become peaking during near-axis ECRH (0.8 MW), the T_ein the plasma center (z＝0) increase 0.6 keV, however, the increment of T_e in the plasma edge (z＝30cm) is only 0.1keV, a mass of high-energy electrons are generated during ECRH phase, therefore, the electron velocity distribution is changed evidently during ECRH; both the number and energy of the high-energy electrons is larger in plasma center (z＝0) than that in plasma edge (z＝30cm), the energy of high-energy electrons in plasma center can extend to 17keV. It can be concluded from the experimental results that heating effect of ECRH is very obvious, the energy of ECW is mainly deposited in the plasma center during near-axis ECRH (B_t＝1.3T) discharges, and the electron velocity distribution changes from Maxwellian to non-Maxwellian normally.

Key words: Pulse height analysis, Silicon drift detector, Electron temperature profile, Electron velocity distribution, ECRH

中图分类号:

张轶泼，刘仪，杨进蔚，宋先瑛，李旭，袁国梁，潘传红. HL-2A装置SDD软X射线PHA阵列实验结果[J]. 核聚变与等离子体物理, 2010, 30(2): 97-102.

ZHANG Yi-po,LIU Yi,YANG Jin-wei,SONG Xian-ying,LI Xu,YUAN Guo-liang,PAN Chan-hon. Experimental results from SDD soft X-ray PHA array on the HL-2A tokamak[J]. NUCLEAR FUSION AND PLASMA PHYSICS, 2010, 30(2): 97-102.

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HL-2A装置SDD软X射线PHA阵列实验结果

Experimental results from SDD soft X-ray PHA array on the HL-2A tokamak

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