激光间接驱动内爆靶丸的X光诊断
X-ray diagnostics of laser indirect-driven implosion pellet
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摘要: 报道了神光Ⅱ激光聚变实验中内爆燃料靶丸区电子温度、电子密度以及燃料面密度的X光诊断结果。在电子温度诊断中，采用X射线光谱学方法，根据聚变靶丸燃料区的Ar示踪元素的Ly-β线与He-β线的强度比推断出靶丸燃料区电子温度为(950±100) eV；在电子密度诊断中，利用靶丸燃料区Ar元素的He-β线Stark展宽确定聚变靶丸芯部的电子密度为(0.9±0.2)×1024 cm-3；在燃料区面密度诊断中，利用X光单能照相技术获得了内爆靶丸的燃料面密度为（3.2±0.5） mg/cm2。Abstract: In this paper, the electron temperature, electron density and areal density of imploded fuel pellet driven by SGⅡ laser were diagnosed through X-ray method. The electron temperature deduced from intensity ratio of Ly-beta line and He-beta line of Ar tracer doped in DD fuel was determined to be(950±100) eV. The electron density which was deduced from Stark broadening of He-beta line was determined to be (0.9±0.2)×1024cm-3. And the fuel areal density, which was deduced from X-ray monochromatic imaging of compressed fuel, was determined to be (3.2±0.5) mg/cm2.
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Key words:
- laser fusion /
- x-ray diagnostics /
- implosion pellet /
- electron temperature /
- electron density /
- fuel areal density
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