摘要
报道了辐射加热Al样品的K壳层辐射吸收谱实验.在神光Ⅱ激光装置上,将8路主激光注入锥柱型金腔产生高温辐射源,利用该辐射源加热腔内的Al薄膜样品,产生温度达到几十电子伏的热稠密等离子体.相对主激光延迟一定时间后,利用第9路激光短脉冲聚焦打靶加热金盘,产生短脉冲X光点光源.通过测量0·75—0·85nm波长范围内未经样品衰减以及经过样品衰减后的背光源辐射光谱,得到了Al样品的K壳层吸收谱.利用细致谱线计算的吸收谱对实验光谱进行拟合,确定了Al样品等离子体的电子温度.
K-shell absorption spectroscopy of radiatively heated Al sample is reported. The experiment was conducted on Shenguang-ⅡLaser facility. Eight main beams of the facitliy are injected into a conical gold cavity to produce high-temperature X-ray heating source. This X-ray source is then used to irradiate an Al foil located in the center of the cavity, and heat the foil to temperature of tens of electronvoh. After a time delay, a ninth short-pulsed laser beam is focused on a gold disk to generated an X-ray pointbacklighter. By measuring the spectra both directly from backlighter and attenuated by the heated sample in the wavelength range of 0.75-0.85 nm, the K-shell absorption spectrum of Al is obtained. By fitting the experimental spectrum with theoretical calculation, electron temperature of the heated sample is determined.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2008年第2期985-989,共5页
Acta Physica Sinica
基金
高温高密度等离子体物理国防科技重点实验室基金(批准号:9140C6804020606)资助的课题.~~
