Direct measurement of coherent ultrahigh wakefields excited by intense ultrashort laser pulses in a gas-jet plasma

被引：47
作者：
Kotaki, H [1 ]
Kando, M
Oketa, T
Masuda, S
Koga, JK
Kondo, S
Kanazawa, S
Yokoyama, T
Matoba, T
Nakajima, K
机构：
[1] Japan Atom Energy Res Inst, Kyoto 6190215, Japan
[2] Grad Univ Adv Studies, Kanagawa 2400193, Japan
[3] High Energy Accelerator Res Org, Tsukuba, Ibaraki 3050801, Japan
来源：
PHYSICS OF PLASMAS | 2002年 / 9卷 / 04期
关键词：
D O I：
10.1063/1.1457464
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：
The coherent wakefield excited by 2 TW, 50 fs laser pulses in a gas-jet plasma around 10(18) cm(-3) is measured with a time-resolved frequency domain interferometer. The density distribution of the helium gas is measured with a time-resolved Mach-Zehnder interferometer to search for the optimum laser focus position and timing in the gas jet. The results show an accelerating wakefield excitation of 20 GeV/m with good coherency, which is useful for ultrahigh gradient particle acceleration in a compact system. This is the first time-resolved measurement of laser wakefield excitation in a gas-jet plasma. (C) 2002 American Institute of Physics.
引用
收藏
页码：1392 / 1400
页数：9
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