学术
摘 要:
用两道独立的硅漂移探测器（SDD）测量了HL-2A等离子体在电子回旋回热（ECRH）期间的软X射线能谱，给出了电子温度。SDD软X射线能潜测量系统所测量的结果与电子回旋辐射（ECE）所测量的电子温度分布能较好地相互吻合。SDD软X射线能谱测量结果表明：在轴ECRH期间，等离子体芯部（z=0）得到加热的迹象比z=-16．4cm处更加显著，由此可推断出在轴ECRH期间ECW的能量主要沉积在等离子体芯部并且电子温度剖面趋于峰化。对2．41T≤环向磁场BT≤2．43T，1．5×10^19m^-3≤电子密度ne≤2．5×10^19m^-3，300kW≤ECRH功率≤600kW范围的ECRH数据的统计结果表明：ECRH使得等离子体中的电子得到显著的加热，芯部等离子体电子温度可提升30％～80％，z=-16．4cm处的电子温度可提升15％～55％。[著者文摘]
文章出处:
《核聚变与等离子体物理》-2008年28卷1期 -11-16页
栏目信息:
文献标识码:
A
文章编号:
0254-6086（2008）01-0011-06
Results of soft X-ray spectra measurement using silicon drift detector on the HL-2A tokamak
ZHANG Yi-po, YANG Jin-wei, SONG Xian-ying, LIU Yi （Southwestern Institute of Physics, Chengdu 610041 ）
Abstract:
Measurements of soft X-ray spectra during Electron Cyclotron Resonance Heating （ECRH） has been achieved on HL-2A tokamak using two independent silicon drift detector （SDD） systems. Electron temperatures are derived from the measured soft X-ray energy spectra. A comparison indicates that the results measured by SDD are consistent with ECE measurements. Experimental results of soft X-ray spectra measurement using SDD show that the increment of electron temperature is larger at z=0 than that at z = 16.4cm chord, so, we can conclude that the energy of ECW is deposited dominantly in the core of plasma and electron temperature profile become peaked during on-axis ECRH （BT=2.4T）. The statistic survey of ECRH discharges （2.41T ≤ BT ≤ 2.43T,1.5×10^19m^-3 ≤ ne ≤ 2.5×10^19m^-3,300kW ≤ ECRH power ≤ 600kW） shows that plasma electron temperature rises obviously during on-axis ECRH, especially, in the core of plasma （z=0）. It has been observed that the on-axis ECRH can make electron temperature increase up to 30%-80% at z=0 chord and 15%-55% at z=-16.4cm chord.[著者文摘]
Key words:
Silicon drift detector （SDD）; Soft X-ray spectrum; Electron cyclotron resonance heating
基金资助:
国家自然科学基金资助项目（10675124）
更多>>免费文章
cqvip.com