丝阵靶箍缩等离子体软X射线辐射能谱研究
Dynamics of soft X-ray radiation spectra of imploding wire arrays on the S—300 pulsed power generator
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摘要: 在S—300装置上研究了丝阵靶Z箍缩等离子体的软X射线辐射的动态过程。利用多通道X射线谱仪在50～2 000 eV范围内测量了丝阵靶内爆等离子体X射线辐射谱，辐射主要位于60~220 eV谱段。辐射谱可用温度为40~50 eV的Planck黑体谱近似描述。在能量高于500 eV的谱段，辐射谱与Planck黑体谱有较大的偏离。这主要是因为等离子体热斑的出现、在1.5~2 keV范围内线谱的存在和加速电子轫致辐射的结果。Abstract: The dynamics of radiation spectra of fast Z-pinch plasmas is studied on the S-300 machine. By means of the polychromator APCH—10, X-ray spectra of imploding wire arrays are measured in the range of 50~1 500 eV. The main part of the radiation power falls at the spectral interval 60~220 eV. The radiation spectrum is described by the Planckian -spectrum with the “black-body” temperature of 40~50 eV. For the part of radiation with more than 500 eV energy of quanta, remarkable deviation from the Planckian-spectrum is observed. The deviation seems to be the result of the appearance of hot plasma spots, existence of characteristic spectral lines in the range of 1.5~2 keV, and bremsstrahlung losses of the accelerated electrons.
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Key words:
- z-pinch /
- wire arrays /
- polychromator /
- radiation spectrum of x-ray
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