用于测量Z箍缩铝等离子体K层辐射的邻苯二甲酸氢铊弯晶摄谱仪
TAP curved crystal spectrometer for diagnosing K-shell radiation of aluminum Z-pinch plasma
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摘要: 基于邻苯二甲酸氢铊(TAP)弯晶和软X射线分幅相机建立了一套4通道的时空分辨弯晶摄谱仪，测谱范围1 500～2 300 eV，时间分辨约2 ns。分析了谱仪各环节的信号传递和转换过程对系统谱响应的影响。利用该谱仪在“强光一号”加速器(约1.5 MA, 80～100 ns)Al丝阵Z箍缩实验中获得了时间分辨及时间积分的Al等离子体K层辐射谱，记录到了类H、类He离子主要共振线及类Li、类He离子双电子复合伴线。将摄谱结果与分能区X射线图像进行了比较。时间分辨的发射谱相对强度与积分结果有明显不同，反映了等离子体在5～10 ns时间尺度上的电子温度和离子布居变化。Abstract: A temporally-and spatially-resolved X-ray spectrometer, with spectral range of 1 500～2 300 eV and temporal resolution about 2 ns, has been developed for diagnosing K-shell radiation of aluminum wire array Z-pinch plasma driven by Qiangguang-I generator (1.5 MA, 80～100 ns). It consisted of an elliptically-curved TAP crystal and a four-channel X-ray frame camera. Theoretical analyses were made to check out possible effects of different signal transfer and conversion processes on spectral response of the spectrometer. It recorded time-resolved and -integrated K-shell resonance lines of H-, He-like aluminum ions and satellite lines of Li-, He-like ions. Results were compared with spectral-resolved X-ray images obtained by pinhole cameras. Time-resolved K-shell spectra show many differences o
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Key words:
- z-pinch /
- k-shell radiation /
- curved crystal spectrometer /
- frame camera
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