Micro focusing of fast electrons with opened cone targets

Journal Article · Sun Jan 15 00:00:00 EST 2012 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3671954· OSTI ID:22043596

Feng, Liu; Xiaoxuan, Liu; Wenjun, Ding; Fei, Du; Yutong, Li; Jinglong, Ma; Xiaolong, Liu; Liming, Chen; Xin, Lu; Quanli, Dong; Weimin, Wang; Zhaohua, Wang; Zhiyi, Wei ^[1]; Bicheng, Liu ^[1]; Zhengming, Sheng; Jie, Zhang ^[1]

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1. Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China)

Using opened reentrant cone silicon targets, we have demonstrated the effect of micro focusing of fast electrons generated in intense laser-plasma interactions. When an intense femtosecond laser pulse is focused tightly onto one of the side walls of the cone, fast electron beam emitted along the side wall is observed. When a line focus spot, which is long enough to irradiate both of the side walls of the cone simultaneously, is used, two electron beams emitted along each side wall, respectively, are observed. The two beams should cross each other near the open tip of the cone, resulting in micro focusing. We use a two-dimensional Particle-In-Cell code to simulate the electron emission both in opened and closed cone targets. The simulation results of the opened cone targets are in agreement with the experimental observation while the results of the closed cone targets do not show the micro focusing effect.

• OSTI ID: 22043596
• Journal Information: Physics of Plasmas, Vol. 19, Issue 1; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CONES
ELECTRON BEAMS
ELECTRON EMISSION
ELECTRONS
FOCUSING
INTERACTIONS
IRRADIATION
LASER RADIATION
LIGHT TRANSMISSION
PLASMA
PLASMA SIMULATION
PULSES
SILICON
TWO-DIMENSIONAL CALCULATIONS