摘要
利用神光－Ⅰ激光装置的南路光束经ＫＤＰ晶体倍频后的０．５３μｍ激光与金盘靶相互作用，重点研究了吸收、Ｘ光转换、ＳＲＳ、超热电子和离子发射行为。结果表明，采用短波长激光，吸收和Ｘ－光转换率明显提高。
An experiment, to study the interaction of 0.53μm light whih gold disk was conducted, using one of the two arms of Shenguang- I laser facility. The disks were irradiated with 100～200J of linearly polarized 0.53μm light in 0.8ns nominally Gaussian pulses. In the experiments pyroelectric calorimeter X-ray diodes with flat -response, Faraday ions collectors, K edge filter hard X-ray spectrometer. Optical multichannel analyser and laser energy calorimeter were used to diagnose absorption X-ray conervsion, ions emission, hard X-ray emission, Raman scattered light respectively. The experimental results with 0.53μm light were compared with that with 1.053μm light . The comparion shows that inverse Bremsstrahlung absorption is the primary absorption mechanism to 0.53μm light, the absorption increases with the decreasing of incident angle, irradiation intensity and laser wavelength. Temperature of hot electrons decreased by a factor of 2, and energy of hot eletron decreased by an order of about 1～2 by substituting 1.053μm light with 0.53mm light. All these results were in good agreement with the theory qualitatively.
出处
《强激光与粒子束》
EI
CAS
CSCD
1996年第2期215-220,共6页
High Power Laser and Particle Beams
关键词
激光
等离子体
X-光转换
非线性过程
Energy absorption
Energy conversion
High energy lasers
Laser beam effects
Laser produced plasmas
Plasma interactions
