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Title: Laser acceleration of protons using multi-ion plasma gaseous targets

Abstract

We present a theoretical and numerical study of a novel acceleration scheme by applying a combination of laser radiation pressure and shielded Coulomb repulsion in laser acceleration of protons in multi-species gaseous targets. By using a circularly polarized CO 2 laser pulse with a wavelength of 10 μm—much greater than that of a Ti: Sapphire laser—the critical density is significantly reduced, and a high-pressure gaseous target can be used to achieve an overdense plasma. This gives us a larger degree of freedom in selecting the target compounds or mixtures, as well as their density and thickness profiles. By impinging such a laser beam on a carbon–hydrogen target, the gaseous target is first compressed and accelerated by radiation pressure until the electron layer disrupts, after which the protons are further accelerated by the electron-shielded carbon ion layer. An 80 MeV quasi-monoenergetic proton beam can be generated using a half-sine shaped laser beam with a peak power of 70 TW and a pulse duration of 150 wave periods.

Authors:
 [1];  [1];  [1];  [2]; ;  [3];  [4]
  1. Univ. of Maryland, College Park, MD (United States)
  2. Univ. of Maryland, College Park, MD (United States); Strathclyde Univ., Glasgow (United Kingdom)
  3. Academia Sinica, Taipei (Taiwan). Institute of Atomic and Molecular Sciences; National Central Univ., Taoyuan (Taiwan)
  4. National Central Univ., Taoyuan (Taiwan)
Publication Date:
Research Org.:
Univ. of Maryland, College Park, MD (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)
OSTI Identifier:
1341477
Alternate Identifier(s):
OSTI ID: 1193635
Grant/Contract Number:  
SC0008391
Resource Type:
Published Article
Journal Name:
New Journal of Physics
Additional Journal Information:
Journal Volume: 17; Journal Issue: 2; Journal ID: ISSN 1367-2630
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; laser-plasma acceleration of electrons and ions; particle-in-cell method; laser-plasma interactions; relativistic plasmas

Citation Formats

Liu, Tung -Chang, Shao, Xi, Liu, Chuan -Sheng, Eliasson, Bengt, W. T. Hill, III, Wang, Jyhpyng, and Chen, Shih -Hung. Laser acceleration of protons using multi-ion plasma gaseous targets. United States: N. p., 2015. Web. doi:10.1088/1367-2630/17/2/023018.
Liu, Tung -Chang, Shao, Xi, Liu, Chuan -Sheng, Eliasson, Bengt, W. T. Hill, III, Wang, Jyhpyng, & Chen, Shih -Hung. Laser acceleration of protons using multi-ion plasma gaseous targets. United States. doi:10.1088/1367-2630/17/2/023018.
Liu, Tung -Chang, Shao, Xi, Liu, Chuan -Sheng, Eliasson, Bengt, W. T. Hill, III, Wang, Jyhpyng, and Chen, Shih -Hung. Wed . "Laser acceleration of protons using multi-ion plasma gaseous targets". United States. doi:10.1088/1367-2630/17/2/023018.
@article{osti_1341477,
title = {Laser acceleration of protons using multi-ion plasma gaseous targets},
author = {Liu, Tung -Chang and Shao, Xi and Liu, Chuan -Sheng and Eliasson, Bengt and W. T. Hill, III and Wang, Jyhpyng and Chen, Shih -Hung},
abstractNote = {We present a theoretical and numerical study of a novel acceleration scheme by applying a combination of laser radiation pressure and shielded Coulomb repulsion in laser acceleration of protons in multi-species gaseous targets. By using a circularly polarized CO2 laser pulse with a wavelength of 10 μm—much greater than that of a Ti: Sapphire laser—the critical density is significantly reduced, and a high-pressure gaseous target can be used to achieve an overdense plasma. This gives us a larger degree of freedom in selecting the target compounds or mixtures, as well as their density and thickness profiles. By impinging such a laser beam on a carbon–hydrogen target, the gaseous target is first compressed and accelerated by radiation pressure until the electron layer disrupts, after which the protons are further accelerated by the electron-shielded carbon ion layer. An 80 MeV quasi-monoenergetic proton beam can be generated using a half-sine shaped laser beam with a peak power of 70 TW and a pulse duration of 150 wave periods.},
doi = {10.1088/1367-2630/17/2/023018},
journal = {New Journal of Physics},
number = 2,
volume = 17,
place = {United States},
year = {2015},
month = {2}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1088/1367-2630/17/2/023018

Citation Metrics:
Cited by: 1 work
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