科技报告详细信息
Isochoric Heating of Reduced Mass Targets by Ultra-intense Laser Produced Relativistic Electrons.
Neumayer, P. ; Lee, H. J. ; Offerman, D. ; Shipton, E. ; Kemp, A. ; Kritcher, A. L.
Technical Information Center Oak Ridge Tennessee
关键词: Electrons;    Heating;    Ionization;    K shell;    Plastics;   
RP-ID  :  DE2009948650
学科分类:工程和技术(综合)
美国|英语
来源: National Technical Reports Library
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【 摘 要 】

We present measurements of the chlorine K-alpha emission from reduced mass targets, irradiated with ultra-high intensity laser pulses. Chlorinated plastic targets with diameters down to 50 micrometers and mass of a few 10(sup -8) g were irradiated with up to 7 J of laser energy focused to intensities of several 10(sup 19)W/cm(sup 2). The conversion of laser energy to K-alpha radiation is measured, as well as high resolution spectra that allow observation of line shifts, indicating isochoric heating of the target up to 18 eV. A zero-dimensional 2-temperature equilibration model, combined with electron impact K-shell ionization and post processed spectra from collisional radiative calculations reproduces the observed K-alpha yields and line shifts, and shows the importance of target expansion due to the hot electron pressure.

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