X射线连续谱法诊断铝丝阵Z箍缩等离子体温度

X-ray continuum spectra for diagnosing plasma temperature in aluminum wire array Z-pinches

用球面石英弯晶衍射、CCD记录测量铝丝阵Z箍缩中的时间积分X射线连续能谱,并由连续谱斜率拟合出电子温度.该法获得的拟合数据点多,能有效筛除含线辐射的数据,减弱线辐射的影响,求得更可靠的等离子体核心高温区的温度.以发次09076为例,核心温度约为250eV,在95%的置信度范围里,其变化范围约241—258eV.

Time-integrated X-ray continuum spectra measured with spherical bent quartz crystal and CCD in aluminum wire array Z-pinches,provide electron temperature by fitting the continuum slope.More data obtained for fitting and markedly reduced influence of line radiation by removing the data superimposed with line spectra,make the temperature in hot core region of plasma more reliable.In experiment of shot No.09076,the core temperature is around 250 eV,ranging from 241 eV to 258 eV at a 95% confidence level.