Microjet formation and hard x-ray production from a liquid metal target irradiated by intense femtosecond laser pulses

被引：5

作者：

Lar'kin, A. ^{[1
,2
]}

Uryupina, D. ^{[1
,2
]}

Ivanov, K. ^{[1
,2
]}

Savel'ev, A. ^{[1
,2
]}

Bonnet, T. ^{[3
]}

Gobet, F. ^{[3
]}

Hannachi, F. ^{[3
]}

Tarisien, M. ^{[3
]}

Versteegen, M. ^{[3
]}

Spohr, K. ^{[4
]}

Breil, J. ^{[5
]}

Chimier, B. ^{[5
]}

Dorchies, F. ^{[5
]}

Fourment, C. ^{[5
]}

Leguay, P. -M. ^{[5
]}

Tikhonchuk, V. T. ^{[5
]}

机构：

[1] Moscow MV Lomonosov State Univ, Ctr Int Laser, Moscow 119991, Russia

[2] Moscow MV Lomonosov State Univ, Fac Phys, Moscow 119991, Russia

[3] Univ Bordeaux, CNRS, IN2P3, Ctr Etud Nucl Bordeaux Gradignan, F-33170 Gradignan, France

[4] Univ West Scotland, Sch Engn, Paisley PA1 2BE, Renfrew, Scotland

[5] Univ Bordeaux, CNRS, CEA, Ctr Lasers Intenses & Applicat, F-33405 Talence, France

来源：

PHYSICS OF PLASMAS | 2014年 / 21卷 / 09期

关键词：

JETS;

D O I：

10.1063/1.4894099

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

By using a liquid metal as a target one may significantly enhance the yield of hard x-rays with a sequence of two intense femtosecond laser pulses. The influence of the time delay between the two pulses is studied experimentally and interpreted with numerical simulations. It was suggested that the first arbitrary weak pulse produces microjets from the target surface, while the second intense pulse provides an efficient electron heating and acceleration along the jet surface. These energetic electrons are the source of x-ray emission while striking the target surface. The microjet formation is explained based on the results given by both optical diagnostics and hydrodynamic modeling by a collision of shocks originated from two distinct zones of laser energy deposition. (C) 2014 AIP Publishing LLC.

引用

页数：7

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