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Title: Laser wake-field acceleration in pre-formed plasma channel created by pre-pulse pedestal of terawatt laser pulse

Abstract

The role of nanosecond duration pre-pulse pedestal (Amplified Spontaneous Emission (ASE) pre-pulse) in the propagation of 45 fs, 4 TW Ti:Sapphire laser pulse through a helium gas jet target has been investigated. We observed that the pre-pulse pedestal of about 1 ns duration and intensity 3 x 10{sup 12} W/cm{sup 2} creates pre-formed plasma with optical guiding channel like structure in the gas-jet at density around 3 x 10{sup 19} cm{sup -3}. Guiding of the 45 fs laser pulse (I{sub L} = 3 x 10{sup 18} W/cm{sup 2}) in the pre-formed plasma channel, over a distance much longer than the Rayleigh length was also observed. The guiding of the laser pulse resulted in the generation of high energy electron beam by laser wake-field acceleration of self-injected electrons. The accelerated electron beam was quasi-monoenergetic with peak energy up to 50 MeV, low divergence in the range of 3-6 mrad, and bunch charge up to 100 pC.

Authors:
; ; ; ;  [1]
  1. Laser Plasma Division, Raja Ramanna Centre for Advanced Technology, Indore 452 013 (India)
Publication Date:
OSTI Identifier:
22043518
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 18; Journal Issue: 9; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ACCELERATION; DENSITY; ELECTRON BEAMS; EMISSION; HELIUM; LASER RADIATION; MEV RANGE 10-100; PEAKS; PLASMA; PLASMA GUNS; POWER RANGE 01-10 TW; PULSES; WAKEFIELD ACCELERATORS

Citation Formats

Sanyasi Rao, Bobbili, Chakera, Juzer Ali, Naik, Prasad Anant, Kumar, Mukund, and Gupta, Parshotam Dass. Laser wake-field acceleration in pre-formed plasma channel created by pre-pulse pedestal of terawatt laser pulse. United States: N. p., 2011. Web. doi:10.1063/1.3629983.
Sanyasi Rao, Bobbili, Chakera, Juzer Ali, Naik, Prasad Anant, Kumar, Mukund, & Gupta, Parshotam Dass. Laser wake-field acceleration in pre-formed plasma channel created by pre-pulse pedestal of terawatt laser pulse. United States. doi:10.1063/1.3629983.
Sanyasi Rao, Bobbili, Chakera, Juzer Ali, Naik, Prasad Anant, Kumar, Mukund, and Gupta, Parshotam Dass. Thu . "Laser wake-field acceleration in pre-formed plasma channel created by pre-pulse pedestal of terawatt laser pulse". United States. doi:10.1063/1.3629983.
@article{osti_22043518,
title = {Laser wake-field acceleration in pre-formed plasma channel created by pre-pulse pedestal of terawatt laser pulse},
author = {Sanyasi Rao, Bobbili and Chakera, Juzer Ali and Naik, Prasad Anant and Kumar, Mukund and Gupta, Parshotam Dass},
abstractNote = {The role of nanosecond duration pre-pulse pedestal (Amplified Spontaneous Emission (ASE) pre-pulse) in the propagation of 45 fs, 4 TW Ti:Sapphire laser pulse through a helium gas jet target has been investigated. We observed that the pre-pulse pedestal of about 1 ns duration and intensity 3 x 10{sup 12} W/cm{sup 2} creates pre-formed plasma with optical guiding channel like structure in the gas-jet at density around 3 x 10{sup 19} cm{sup -3}. Guiding of the 45 fs laser pulse (I{sub L} = 3 x 10{sup 18} W/cm{sup 2}) in the pre-formed plasma channel, over a distance much longer than the Rayleigh length was also observed. The guiding of the laser pulse resulted in the generation of high energy electron beam by laser wake-field acceleration of self-injected electrons. The accelerated electron beam was quasi-monoenergetic with peak energy up to 50 MeV, low divergence in the range of 3-6 mrad, and bunch charge up to 100 pC.},
doi = {10.1063/1.3629983},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 9,
volume = 18,
place = {United States},
year = {2011},
month = {9}
}