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Title: Electron bunch acceleration in an inverse free-electron laser with a helical magnetic wiggler and axial guide field

Abstract

Electron bunch acceleration by a laser pulse having Gaussian radial and temporal profiles of intensity has been studied numerically in a static helical magnetic wiggler in vacuum. The main electron bunch parameters for simulations are 10 MeV initial energy with 0.1% longitudinal energy spread, 1 mm mrad rms transverse emittance, and 3x10{sup 12} cm{sup -3} density. It is shown that the radial Gaussian profile can decrease the acceleration gradient compared with that of the plane-wave approximation due to the reduction of electron-pulse interaction area. In order to collimate electron bunch and overcome the decreasing of the acceleration gradient, an external axial magnetic field is used. The importance of the electron initial phase with respect to laser pulse is considered, and some appropriate values are found. Finally, acceleration of a femtosecond (fs) microbunch with an optimum appropriate initial phase is considered, which leads to a nearly monoenergetic microbunch and an acceleration gradient of about {approx_equal}0.2 GeV/m.

Authors:
; ; ;  [1]
  1. Faculty of Basic Science, Department of Physics, Mazandaran University, Babolsar (Iran, Islamic Republic of)
Publication Date:
OSTI Identifier:
20860457
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 13; Journal Issue: 12; Other Information: DOI: 10.1063/1.2402508; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 43 PARTICLE ACCELERATORS; ACCELERATION; ACCELERATORS; APPROXIMATIONS; BEAM BUNCHING; COMPUTERIZED SIMULATION; ELECTRONS; FREE ELECTRON LASERS; GEV RANGE; LIGHT TRANSMISSION; MAGNETIC FIELDS; MEV RANGE; NUMERICAL ANALYSIS; PLASMA; PLASMA GUNS; PULSES

Citation Formats

Mirzanejhad, Saeed, Sohbatzadeh, Farshad, Asri, Mehdi, and Toosi, Ershad Sadeghi. Electron bunch acceleration in an inverse free-electron laser with a helical magnetic wiggler and axial guide field. United States: N. p., 2006. Web. doi:10.1063/1.2402508.
Mirzanejhad, Saeed, Sohbatzadeh, Farshad, Asri, Mehdi, & Toosi, Ershad Sadeghi. Electron bunch acceleration in an inverse free-electron laser with a helical magnetic wiggler and axial guide field. United States. doi:10.1063/1.2402508.
Mirzanejhad, Saeed, Sohbatzadeh, Farshad, Asri, Mehdi, and Toosi, Ershad Sadeghi. Fri . "Electron bunch acceleration in an inverse free-electron laser with a helical magnetic wiggler and axial guide field". United States. doi:10.1063/1.2402508.
@article{osti_20860457,
title = {Electron bunch acceleration in an inverse free-electron laser with a helical magnetic wiggler and axial guide field},
author = {Mirzanejhad, Saeed and Sohbatzadeh, Farshad and Asri, Mehdi and Toosi, Ershad Sadeghi},
abstractNote = {Electron bunch acceleration by a laser pulse having Gaussian radial and temporal profiles of intensity has been studied numerically in a static helical magnetic wiggler in vacuum. The main electron bunch parameters for simulations are 10 MeV initial energy with 0.1% longitudinal energy spread, 1 mm mrad rms transverse emittance, and 3x10{sup 12} cm{sup -3} density. It is shown that the radial Gaussian profile can decrease the acceleration gradient compared with that of the plane-wave approximation due to the reduction of electron-pulse interaction area. In order to collimate electron bunch and overcome the decreasing of the acceleration gradient, an external axial magnetic field is used. The importance of the electron initial phase with respect to laser pulse is considered, and some appropriate values are found. Finally, acceleration of a femtosecond (fs) microbunch with an optimum appropriate initial phase is considered, which leads to a nearly monoenergetic microbunch and an acceleration gradient of about {approx_equal}0.2 GeV/m.},
doi = {10.1063/1.2402508},
journal = {Physics of Plasmas},
number = 12,
volume = 13,
place = {United States},
year = {Fri Dec 15 00:00:00 EST 2006},
month = {Fri Dec 15 00:00:00 EST 2006}
}