强激光与粒子束, 2009, 21 (11): 1655, 网络出版: 2010-02-28   

软X光Dante谱仪的平滑解谱算法及其在Z箍缩诊断中的应用

Smooth unfolding algorithm for soft X-ray Dante spectrometer and its application to Z-pinch diagnostic
作者单位
1 清华大学 工程物理系,北京 100084
2 中国工程物理研究院 流体物理研究所,四川 绵阳 621900
摘要
针对自行研制的8通道Dante谱仪,提出了一种使用B样条曲线进行平滑解谱的算法,并用黑体谱对其进行了验证。计算结果表明:新算法与使用矩形函数解谱的算法相比,对能谱轮廓与总辐射强度的反演精度均有明显提高。给出了“阳”加速器氩气喷气Z箍缩实验的测量波形,由8通道Dante谱仪的测量结果解谱得到的软X光峰值辐射功率和总能量分别为40.5 GW和851 J,与软X光功率计经修正后的测量结果相一致。
Abstract
Soft X-ray Dante spectrometer is one of the primary instruments to diagnose the X-ray radiation emitted by Z-pinch plasma. To obtain the spectra and power of X-rays,unfolding treatment of the measuring data is a must. The structure of a recently developed eight-channel Dante spectrometer is introduced and a smooth unfolding algorithm using parabolic B-splines is presented. Numerical simulation shows that,for blackbody spectra with temperature ranging from 20 to 250 eV,both the spectra and power are accurately recovered. Experimental waveforms measured during Z-pinch experiments performed on the Yang accelerator. The 40.5 GW X-ray peaking power and 851 J X-ray energy unfolded from the measurements of the Dante spectrometer were in agreement with the corrected results of the sofe X-ray power meter.

李晶, 黄显宾, 张思群, 杨礼兵, 谢卫平, 蒲以康. 软X光Dante谱仪的平滑解谱算法及其在Z箍缩诊断中的应用[J]. 强激光与粒子束, 2009, 21(11): 1655. Li Jing, Huang Xianbin, Zhang Siqun, Yang Libing, Xie Weiping, Pu Yikang. Smooth unfolding algorithm for soft X-ray Dante spectrometer and its application to Z-pinch diagnostic[J]. High Power Laser and Particle Beams, 2009, 21(11): 1655.

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