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Title: Quasimonoenergetic electron beam generation by using a pinholelike collimator in a self-modulated laser wakefield acceleration

Abstract

A relativistic electron bunch with a large charge (>2 nC) was produced from a self-modulated laser wakefield acceleration configuration. For this experiment, an intense laser beam with a peak power of 2 TW and a duration of 700 fs was focused in a supersonic He gas jet, and relativistic high-energy electrons were observed from the strong laser-plasma interaction. By passing the electron bunch through a small pinholelike collimator, we could generate a quasimonoenergetic high-energy electron beam, in which electrons within a cone angle of 0.25 mrad (f/70) were selected. The beam clearly showed a narrow-energy-spread behavior with a central energy of 4.3 MeV and a charge of 200 pC. The acceleration gradient was estimated to be about 30 GeV/m. Particle-in-cell simulations were performed for comparison study and the result shows that both the experimental and simulation results are in good agreement and the electron trapping is initiated by the slow beat wave of the Raman backward wave and the incident laser pulse.

Authors:
; ; ; ; ;  [1]
  1. Center for Advanced Accelerators, Korea Electrotechnology Research Institute, Changwon 641-120 (Korea, Republic of)
Publication Date:
OSTI Identifier:
21069761
Resource Type:
Journal Article
Journal Name:
Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
Additional Journal Information:
Journal Volume: 73; Journal Issue: 1; Other Information: DOI: 10.1103/PhysRevE.73.016405; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1063-651X
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ACCELERATION; BEAM-PLASMA SYSTEMS; COLLIMATORS; COMPARATIVE EVALUATIONS; COMPUTERIZED SIMULATION; ELECTRON BEAMS; ELECTRONS; GEV RANGE; LASERS; LIGHT TRANSMISSION; MEV RANGE; PLASMA; PLASMA GUNS; PLASMA JETS; PULSES; RELATIVISTIC RANGE; TRAPPING; WAKEFIELD ACCELERATORS

Citation Formats

Hafz, N, Hur, M S, Kim, G H, Kim, C, Ko, I S, Suk, H, Pohang Accelerator Laboratory, Pohang 790-784, and Center for Advanced Accelerators, Korea Electrotechnology Research Institute, Changwon 641-120. Quasimonoenergetic electron beam generation by using a pinholelike collimator in a self-modulated laser wakefield acceleration. United States: N. p., 2006. Web. doi:10.1103/PHYSREVE.73.016405.
Hafz, N, Hur, M S, Kim, G H, Kim, C, Ko, I S, Suk, H, Pohang Accelerator Laboratory, Pohang 790-784, & Center for Advanced Accelerators, Korea Electrotechnology Research Institute, Changwon 641-120. Quasimonoenergetic electron beam generation by using a pinholelike collimator in a self-modulated laser wakefield acceleration. United States. https://doi.org/10.1103/PHYSREVE.73.016405
Hafz, N, Hur, M S, Kim, G H, Kim, C, Ko, I S, Suk, H, Pohang Accelerator Laboratory, Pohang 790-784, and Center for Advanced Accelerators, Korea Electrotechnology Research Institute, Changwon 641-120. 2006. "Quasimonoenergetic electron beam generation by using a pinholelike collimator in a self-modulated laser wakefield acceleration". United States. https://doi.org/10.1103/PHYSREVE.73.016405.
@article{osti_21069761,
title = {Quasimonoenergetic electron beam generation by using a pinholelike collimator in a self-modulated laser wakefield acceleration},
author = {Hafz, N and Hur, M S and Kim, G H and Kim, C and Ko, I S and Suk, H and Pohang Accelerator Laboratory, Pohang 790-784 and Center for Advanced Accelerators, Korea Electrotechnology Research Institute, Changwon 641-120},
abstractNote = {A relativistic electron bunch with a large charge (>2 nC) was produced from a self-modulated laser wakefield acceleration configuration. For this experiment, an intense laser beam with a peak power of 2 TW and a duration of 700 fs was focused in a supersonic He gas jet, and relativistic high-energy electrons were observed from the strong laser-plasma interaction. By passing the electron bunch through a small pinholelike collimator, we could generate a quasimonoenergetic high-energy electron beam, in which electrons within a cone angle of 0.25 mrad (f/70) were selected. The beam clearly showed a narrow-energy-spread behavior with a central energy of 4.3 MeV and a charge of 200 pC. The acceleration gradient was estimated to be about 30 GeV/m. Particle-in-cell simulations were performed for comparison study and the result shows that both the experimental and simulation results are in good agreement and the electron trapping is initiated by the slow beat wave of the Raman backward wave and the incident laser pulse.},
doi = {10.1103/PHYSREVE.73.016405},
url = {https://www.osti.gov/biblio/21069761}, journal = {Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics},
issn = {1063-651X},
number = 1,
volume = 73,
place = {United States},
year = {Sun Jan 15 00:00:00 EST 2006},
month = {Sun Jan 15 00:00:00 EST 2006}
}