X-ray radiation properties of clusters heated by fs laser pulses

被引：12

作者：

Faenov, AY ^{[1
]}

Skobelev, IY ^{[1
]}

Magunov, AI ^{[1
]}

Pikuz, TA ^{[1
]}

Abdallah, J ^{[1
]}

Junkel-Vives, GC ^{[1
]}

Blasco, F ^{[1
]}

Dorchies, F ^{[1
]}

Stenz, C ^{[1
]}

Salin, F ^{[1
]}

Auguste, T ^{[1
]}

Dobosz, S ^{[1
]}

Monot, P ^{[1
]}

Oliveira, PD ^{[1
]}

Hulin, S ^{[1
]}

Boldarev, A ^{[1
]}

Gasilov, VA ^{[1
]}

机构：

[1] VNIIFTRI, Multicharged Ions Spectra Data Ctr, Mendeleyevsk 141570, Moscow Region, Russia

来源：

APPLICATIONS OF X RAYS GENERATED FROM LASERS AND OTHER BRIGHT SOURCES II | 2001年 / 4504卷

关键词：

Cluster production; X-ray spectromicroscopy; fs laser-produced plasma diagnostics;

D O I：

10.1117/12.448457

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Review of systematic investigations of X-ray radiation properties of different clusters heated by short-pulse (352000 fs.) high-intensive (10(16)- 10(18)W/cm(2)) Ti:Sa laser radiation is presented. The cluster targets were formed by the adiabatic expansion in vacuum of an Ar or CO2 gas puff produced by a pulsed valve with a Laval or conical nozzles. The gas jet pressure is varied from 15 up to 100 bar. Detailed theoretical modeling of cluster parameters have been done and compared with experimental measurements. High spectrally (lambda/deltalambda=2000-5000) and spatially (40-80 mum) resolved X-Ray spectra near resonance lines of H- and He-like ions of Oxygen and Ar have been obtained and detailed spectroscopic analysis was consistent with a theoretical two-temperature collisional-radiative model of irradiated atomic clusters incorporating with an effects of highly energetic electrons. The role of laser prepulse for X-ray intensity emission and its spatial distribution were investigated in details. X-ray spectra radiation from plasma with electron density more than 10(22) cm(-3) was at first time observed. Big effect of fast electrons influence on the X-ray emission of He-like Ar spectra was demonstrated. Comparison with data under various experimental conditions clearly demonstrated that for increasing X-ray output from plasma the most essential to increase size of clusters and has reasonable value of ps prepulse.

引用

页码：121 / 132

页数：12

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