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Density measurement and MHD simulation ofgas-filled capillary discharge waveguide

Gu Yu-Qiu Ma Zhan-Nan Zheng Wu-Di Wang Xiao-Fang Wu Yu-Chi Zhu Bin Dong Ke-Gong Cao Lei-Feng He Ying-Ling Liu Hong-Jie Hong Wei Zhou Wei-Min Zhao Zong-Qing Zhang Bao-Han Jiao Chun-Ye Wen Xian-Lun Zang Hua-Ping Yu Jin-Qing Wei Lai

Density measurement and MHD simulation ofgas-filled capillary discharge waveguide

Gu Yu-Qiu, Ma Zhan-Nan, Zheng Wu-Di, Wang Xiao-Fang, Wu Yu-Chi, Zhu Bin, Dong Ke-Gong, Cao Lei-Feng, He Ying-Ling, Liu Hong-Jie, Hong Wei, Zhou Wei-Min, Zhao Zong-Qing, Zhang Bao-Han, Jiao Chun-Ye, Wen Xian-Lun, Zang Hua-Ping, Yu Jin-Qing, Wei Lai
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Publishing process
  • Received Date:  02 September 2010
  • Accepted Date:  23 November 2010
  • Published Online:  15 September 2011

Density measurement and MHD simulation ofgas-filled capillary discharge waveguide

  • 1. (1)Institute of Applied Physics and Computational Mathematics, Beijing 100088, China; (2)Key Laboratory of Basic Plasma Physics of Chinese Academy of Sciences, Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China; (3)Science and Technology on Plasma Physics Laboratory, Laser Fusion Research Center, China Academy of Engineering Physics, Mianyang 621900, China; (4)Science and Technology on Plasma Physics Laboratory, Laser Fusion Research Center, China Academy of Engineering Physics, Mianyang 621900, China;Key Laboratory of Basic Plasma Physics of Chinese Academy of Sciences, Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China

Abstract: To accelerate the electrons efficiently in the laser wake-field accelerator, it is necessary to suppress the instability induced by the diffraction and the defocusing of the laser pulse. The gas-filled capillary discharge waveguide can generate an approximately parabolic density distribution, which can guide the laser pulse efficiently and suppress the instability. Using the Stark effect, this plasma density distribution is measured in this paper, and the relationship between plasma density and filled pressure is presented. By using the MHD code CRMHA, the formation of the capillary waveguide is simulated and researched in detail.

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