Collimated quasi-monochromatic beams of accelerated electrons in the interaction of a weak-contrast intense femtosecond laser pulse with a metal foil

被引：10

作者：

Malkov, Yu. A. ^{[1
]}

Stepanov, A. N. ^{[1
]}

Yashunin, D. A. ^{[1
]}

Pugachev, L. P. ^{[2
]}

Levashov, P. R. ^{[2
]}

Andreev, N. E. ^{[2
]}

Platonov, K. Yu. ^{[3
]}

Andreev, A. A. ^{[3
]}

机构：

[1] Russian Acad Sci, Inst Appl Phys, Ul Ulyanova 46, Nizhnii Novgorod 603950, Russia

[2] Russian Acad Sci, Joint Inst High Temp, Moscow 125412, Russia

[3] Fed State Unitary Enterprise Sci & Ind Corp Vavil, St Petersburg 199034, Russia

来源：

HIGH POWER LASER SCIENCE AND ENGINEERING | 2013年 / 1卷 / 02期

关键词：

acceleration of electrons; femtosecond laser radiation; plasma wave; self-modulation instability; PLASMA;

D O I：

10.1017/hpl.2013.13

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We demonstrated experimentally the formation of monoenergetic beams of accelerated electrons by focusing femtosecond laser radiation with an intensity of 2 x 10(17) W/cm(2) onto the edge of an aluminum foil. The electrons had energy distributions peaking in the 0.2-0.8 MeV range with energy spread less than 20%. The acceleration mechanism related to the generation of a plasma wave as a result of self-modulation instability of a laser pulse in a dense plasma formed by a prepulse (arriving 12 ns before the main pulse) is considered. One-dimensional and two-dimensional Particle in Cell (PIC) simulations of the laser-plasma interaction showed that effective excitation of a plasma wave as well as trapping and acceleration of an electron beam with an energy on the order of 1 MeV may occur in the presence of sharp gradients in plasma density and in the temporal shape of the pulse.

引用

页码：80 / 87

页数：8

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