球面弯晶在X射线诊断中的应用
Application of spherically bent crystals spectrometer to X-ray diagnosis
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摘要: 为了诊断等离子体X射线，利用X射线布拉格衍射原理研制了球面弯晶谱仪。实验采用α-石英作为其晶体分析器色散元件，晶体弯曲半径为250 mm，布拉格角为30°～67.5°；采用接收面积10 mm×50 mm的X射线胶片作为摄谱器件，接收等离子体X射线谱线信息。通过在“阳”加速器装置上进行实验，得到了钛等离子体X射线K壳层激发谱线信息，其光谱分辨力可达到1 000以上，光谱带宽约为0.43 eV。Abstract: In order to diagnose X-ray emitted from the plasma, a spherically bent crystals spectrometer was developed based on the X-ray Bragg diffraction theory. In the experiment, the dispersive element of crystal analyzer was quartz, the bent radius was 250 mm and the range of Bragg angle of the crystal was 30° to 67.5°. The X-ray film, as its principal detector, obtained spectra information which had an effective area of 10 mm×50 mm. The experiment was carried out at the anode accelerator. The detector obtained the X-ray spectra information of the K-shell Ti spectra. By the analysis of spectra information, the spectral resolution of spherically bent quartz crystals can be achieved for more than 1 000, and the spectral passband is 0.43 eV.
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