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Spatial and temporal characteristics of X-ray emission from hot plasma driven by a relativistic femtosecond laser pulse

Published online by Cambridge University Press:  08 January 2009

W. Hong ,
Y. He ,
T. Wen ,
H. Du ,
J. Teng ,
X. Qing ,
Z. Huang ,
W. Huang ,
H. Liu  and
X. Wang
...Show all authors
W. Hong*
Affiliation:
National Key Laboratory of Laser Fusion, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan Province, China
Y. He
Affiliation:
National Key Laboratory of Laser Fusion, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan Province, China
T. Wen
Affiliation:
National Key Laboratory of Laser Fusion, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan Province, China
H. Du
Affiliation:
National Key Laboratory of Laser Fusion, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan Province, China
J. Teng
Affiliation:
National Key Laboratory of Laser Fusion, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan Province, China
X. Qing
Affiliation:
National Key Laboratory of Laser Fusion, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan Province, China Physics Department, National University of Defense Technology, Changsha, China
Z. Huang
Affiliation:
Department of Engineering Physics, Tsinghua University, Haidian District, Beijing, China
W. Huang
Affiliation:
National Key Laboratory of Laser Fusion, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan Province, China
H. Liu
Affiliation:
National Key Laboratory of Laser Fusion, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan Province, China
X. Wang
Affiliation:
National Key Laboratory of Laser Fusion, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan Province, China
X. Huang
Affiliation:
National Key Laboratory of Laser Fusion, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan Province, China
Q. Zhu
Affiliation:
National Key Laboratory of Laser Fusion, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan Province, China
Y. Ding
Affiliation:
National Key Laboratory of Laser Fusion, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan Province, China
H. Peng
Affiliation:
National Key Laboratory of Laser Fusion, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan Province, China
*
Address correspondence and reprint requests to: Wei Hong, National Key Laboratory of Laser Fusion, Research Center of Laser Fusion, China Academy of Engineering Physics, P.O. Box, 919-986, Mianyang, Sichuan Province, China, 621900. E-mail: jminhong@126.com
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Abstract

We present the temporal and spatial characterization of X-ray sources (at ~1 keV) driven by a 200 TW, 30 fs, 800 nm laser pulse on SILEX-I laser facility at Research Center of Laser Fusion. For laser copper foil interaction with laser intensity between 6 × 1018 W/cm2 and 3 × 1019 W/cm2, the X-ray images show cone-like jet structures. While the yield of X-rays is strongly dependent on the laser intensity, the plasma expansion length is weakly dependent on the laser intensity, and the open angle of the cone-like jet is not correlated to the laser intensity. The formation of the jet structure is attributed to the plasma transverse confine by the self-induced quasi-static magnetic field. An X-ray pedestal 4 ns preceding the main pulse was observed. The correlation between X-ray pedestal and collimated proton beam generation was found.

Keywords

Femtosecond pulsePlasma jetRelativistic plasmasTime-space-resolvedX-ray emission
Type
Research Article
Information
Laser and Particle Beams , Volume 27 , Issue 1 , March 2009 , pp. 19 - 26
Copyright
Copyright © Cambridge University Press 2009

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