High gain x-ray lasers pumped by transient collisional excitation
作者:
J. Dunn,
A. L. Osterheld,
V. N. Shlyaptsev,
J. R. Hunter,
R. Shepherd,
R. E. Stewart,
W. E. White,
期刊:
AIP Conference Proceedings
(AIP Available online 1998)
卷期:
Volume 443,
issue 1
页码: 106-117
ISSN:0094-243X
年代: 1998
DOI:10.1063/1.56567
出版商: AIP
数据来源: AIP
摘要:
We present recent results of x-ray laser amplification of spontaneous emission in Ne-like and Ni-like transient collisional excitation schemes. The plasma formation, ionization and collisional excitation can be optimized using two laser pulses of 1 ns and 1 ps duration at table-top energies of 5 J in each beam. High gain of 35 cm−1has been measured on the 147 Å4d→4pJ=0→1transition of Ni-like Pd and is a direct consequence of the nonstationary population inversion produced by the high intensity picosecond pulse. We report the dependence of the x-ray laser line intensity on the laser plasma conditions and compare the experimental measurements with hydrodynamic and atomic kinetics simulations for Ne-like and Ni-like lasing. ©1998 American Institute of Physics.
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