Enhancement of soft x-ray emission from a cryogenically cooled Ar gas jet irradiated by 25 fs laser pulse

被引：30
|
作者：
Mocek, T [1 ]
Kim, CM [1 ]
Shin, HJ [1 ]
Lee, DG [1 ]
Cha, YH [1 ]
Hong, KH [1 ]
Nam, CH [1 ]
机构：
[1] Korea Adv Inst Sci & Technol, Dept Phys, Taejon 305701, South Korea
来源：
APPLIED PHYSICS LETTERS | 2000年 / 76卷 / 14期
关键词：
D O I：
10.1063/1.126176
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Soft x-ray spectra (40-180 Angstrom) produced by the interaction of 25 fs laser pulses at an intensity of similar to 7 x 10(16) W/cm(2) with a cryogenically cooled Ar gas jet have been measured. New spectral lines from Ar8+ and Ar9+ charge states appeared with decreasing gas temperature. Nonlinear increase of x-ray line emission from Ar7+, Ar8+, and Ar9+ was observed with cooling, which saturated below certain temperature. The drastic change in the spectrum is attributed to efficient collisional heating and collisional ionization of growing (10(2)-10(3) atoms) Ar clusters from the cooled jet. (C) 2000 American Institute of Physics. [S0003-6951(00)02614-0].
引用
收藏
页码：1819 / 1821
页数：3
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