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Title: Radiation Protection Around High-intensity Laser Interactions with Solid Targets

Abstract

Interaction of a high-intensity optical laser with a solid target can generate an ionizing radiation hazard in the form of high-energy "hot" electrons and bremsstrahlung, resulting from hot electrons interacting with the target itself and the surrounding target chamber. Previous studies have characterized the bremsstrahlung dose yields generated by such interactions for lasers in the range of 10 17 to 10 22 W cm -2 using particle-in-cell code EPOCH and Monte Carlo code FLUKA. Electron measurements based on a depth-dose approach are presented for two laser intensities, which indicate a Maxwellian distribution is more suitable for estimating the hot electrons' energy distribution. Also, transmission factors for the resulting bremsstrahlung for common shielding materials are calculated with FLUKA, and shielding tenth-value-layer thicknesses are also derived. In combination with the bremsstrahlung dose yield, the tenth-value layers provide radiation protection programs the means to evaluate radiation hazards and design shielding for high-intensity laser facilities.

Authors:
 [1];  [1];  [1];  [1]
  1. SLAC National Accelerator Lab., Menlo Park, CA (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1490422
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
Health Physics
Additional Journal Information:
Journal Name: Health Physics; Journal ID: ISSN 0017-9078
Publisher:
Health Physics Society
Country of Publication:
United States
Language:
English
Subject:
61 RADIATION PROTECTION AND DOSIMETRY; bremsstrahlung; lasers; radiation protection; shielding

Citation Formats

Liang, Taiee Ted, Bauer, Johannes M., Liu, James C., and Rokni, Sayed H. Radiation Protection Around High-intensity Laser Interactions with Solid Targets. United States: N. p., 2018. Web. doi:10.1097/hp.0000000000000927.
Liang, Taiee Ted, Bauer, Johannes M., Liu, James C., & Rokni, Sayed H. Radiation Protection Around High-intensity Laser Interactions with Solid Targets. United States. doi:10.1097/hp.0000000000000927.
Liang, Taiee Ted, Bauer, Johannes M., Liu, James C., and Rokni, Sayed H. Mon . "Radiation Protection Around High-intensity Laser Interactions with Solid Targets". United States. doi:10.1097/hp.0000000000000927. https://www.osti.gov/servlets/purl/1490422.
@article{osti_1490422,
title = {Radiation Protection Around High-intensity Laser Interactions with Solid Targets},
author = {Liang, Taiee Ted and Bauer, Johannes M. and Liu, James C. and Rokni, Sayed H.},
abstractNote = {Interaction of a high-intensity optical laser with a solid target can generate an ionizing radiation hazard in the form of high-energy "hot" electrons and bremsstrahlung, resulting from hot electrons interacting with the target itself and the surrounding target chamber. Previous studies have characterized the bremsstrahlung dose yields generated by such interactions for lasers in the range of 1017 to 1022 W cm-2 using particle-in-cell code EPOCH and Monte Carlo code FLUKA. Electron measurements based on a depth-dose approach are presented for two laser intensities, which indicate a Maxwellian distribution is more suitable for estimating the hot electrons' energy distribution. Also, transmission factors for the resulting bremsstrahlung for common shielding materials are calculated with FLUKA, and shielding tenth-value-layer thicknesses are also derived. In combination with the bremsstrahlung dose yield, the tenth-value layers provide radiation protection programs the means to evaluate radiation hazards and design shielding for high-intensity laser facilities.},
doi = {10.1097/hp.0000000000000927},
journal = {Health Physics},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {9}
}

Journal Article:
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