Generation of characteristic X rays by a terawatt femtosecond chromium-forsterite laser

被引：14

作者：

Agranat, M. B.

Andreev, N. E.

Ashitkov, S. I.

Ovchinnikov, A. V.

Sitnikov, D. S.

Fortov, V. E.

Shevel'ko, A. P.

机构：

[1] Russian Acad Sci, Inst High Energy Dens, Moscow 125412, Russia

[2] Russian Acad Sci, PN Lebedev Phys Inst, Moscow 119991, Russia

来源：

JETP LETTERS | 2006年 / 83卷 / 02期

基金：

俄罗斯基础研究基金会;

关键词：

D O I：

10.1134/S0021364006020068

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Characteristic K alpha x rays arising when a metallic target is irradiated by femtosecond infrared pulses that are generated by a terawatt chromium-forsterite laser system (1240 nm, 90 mJ, 80 fs) are studied. The absolute yield (up to 3 x 10(8) photons/sr pulse) and the coefficient of the transformation of laser radiation to K-alpha radiation (maximum value = 0.03%) are measured for an iron target. The dependence of the radiation intensity on the angle of incidence of p polarized laser radiation is analyzed. The mechanisms of the production of fast electrons responsible for generating characteristic x rays are discussed.

引用

收藏

页码：72 / 74

页数：3

相关论文

共 13 条

[1] Terawatt femtosecond Cr : forstente laser system [J].

Agranat, MB ;

Ashitkov, SI ;

Ivanov, AA ;

Konyashchenko, AV ;

Ovchinnikov, AV ;

Fortov, VE .

QUANTUM ELECTRONICS, 2004, 34 (06) :506-508

[2]

AGRANAT MB, 2005, P SOC PHOTO-OPT INS, V5918, P184

[3] The generation of a dense hot plasma by intense subpicosecond laser pulses [J].

Andreev, NE ;

Veisman, ME ;

Efremov, VP ;

Fortov, VE .

HIGH TEMPERATURE, 2003, 41 (05) :594-608

[4] Redistribution of energy in dense matter irradiated by short intense laser pulses [J].

Andreev, NE ;

Kostin, VV ;

Veisman, ME .

PHYSICA SCRIPTA, 1998, 58 (05) :486-492

[5] NOT-SO-RESONANT, RESONANT ABSORPTION [J].

BRUNEL, F .

PHYSICAL REVIEW LETTERS, 1987, 59 (01) :52-55

[6] RESONANT ADSORPTION OF LASER LIGHT BY PLASMA TARGETS [J].

FREIDBERG, JP ;

RUDSINSK, LI ;

MORSE, RL ;

MITCHELL, RW .

PHYSICAL REVIEW LETTERS, 1972, 28 (13) :795-+

[7] Short-pulse laser-plasma interactions [J].

Gibbon, P ;

Forster, E .

PLASMA PHYSICS AND CONTROLLED FUSION, 1996, 38 (06) :769-793

[8] Influence of angles of incidence of laser radiation on the generation of fast ions [J].

Gus'kov, SY ;

Demchenko, NN ;

Makarov, KN ;

Nishchuk, SG ;

Pikuz, TA ;

Satov, YA ;

Skobelev, IY ;

Smakovskii, YB ;

Faenov, AY ;

Khomenko, SV ;

Sharkov, BY .

JETP LETTERS, 2001, 73 (12) :655-660

[9] Femtosecond X-ray line emission from multilayer targets irradiated by short laser pulses [J].

Nakano, H ;

Andreev, AA ;

Limpouch, J .

APPLIED PHYSICS B-LASERS AND OPTICS, 2004, 79 (04) :469-476

[10] Yield optimization and time structure of femtosecond laser plasma Kα sources [J].

Reich, C ;

Gibbon, P ;

Uschmann, I ;

Förster, E .

PHYSICAL REVIEW LETTERS, 2000, 84 (21) :4846-4849