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Title: Development of a LIBS system for in situ surface measurements during plasma exposure in PISCES-A

Abstract

A laser-induced breakdown spectroscopy (LIBS) system has been developed with a Q-switched Nd:YAG laser (wavelength = 1064 nm and pulse width ~5 ns) to conduct in situ surface measurements during plasma exposure in the PISCES-A linear divertor plasma simulator. The LIBS signal enhancement is obtained with both the magnetic field normal to the surface of a target and steady-state background plasma. Migration of sputtered Ta impurities onto the neighboring Cr surface is identified during He plasma exposure, only when cone structures are formed on the Cr surface. D retention in W during D plasma exposure is observed to decrease with increasing the sample temperature. The temporal evolution of D outgassing from W is measured in a time range of ~10-420 s right after D plasma exposure. A power law fit, t -α, yields α ~ 0.34 ± 0.09, which is nearly consistent with calculated and measured values.

Authors:
 [1];  [1];  [1]
  1. Univ. of California, San Diego, CA (United States)
Publication Date:
Research Org.:
Univ. of California, San Diego, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1609934
Alternate Identifier(s):
OSTI ID: 1460025
Grant/Contract Number:  
FG02-07ER54912; SC0018268PP
Resource Type:
Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 89; Journal Issue: 10; Journal ID: ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Instruments & Instrumentation; Physics; Surface and interface chemistry; Plasma confinement; Plasma devices; Chemical elements; Isotopes; Plasma sources; Transition metals; Optical metrology; Laser-induced plasma; Laser induced breakdown spectroscopy

Citation Formats

Nishijima, D., Patino, M., and Doerner, R. P. Development of a LIBS system for in situ surface measurements during plasma exposure in PISCES-A. United States: N. p., 2018. Web. doi:10.1063/1.5034349.
Nishijima, D., Patino, M., & Doerner, R. P. Development of a LIBS system for in situ surface measurements during plasma exposure in PISCES-A. United States. doi:10.1063/1.5034349.
Nishijima, D., Patino, M., and Doerner, R. P. Sun . "Development of a LIBS system for in situ surface measurements during plasma exposure in PISCES-A". United States. doi:10.1063/1.5034349. https://www.osti.gov/servlets/purl/1609934.
@article{osti_1609934,
title = {Development of a LIBS system for in situ surface measurements during plasma exposure in PISCES-A},
author = {Nishijima, D. and Patino, M. and Doerner, R. P.},
abstractNote = {A laser-induced breakdown spectroscopy (LIBS) system has been developed with a Q-switched Nd:YAG laser (wavelength = 1064 nm and pulse width ~5 ns) to conduct in situ surface measurements during plasma exposure in the PISCES-A linear divertor plasma simulator. The LIBS signal enhancement is obtained with both the magnetic field normal to the surface of a target and steady-state background plasma. Migration of sputtered Ta impurities onto the neighboring Cr surface is identified during He plasma exposure, only when cone structures are formed on the Cr surface. D retention in W during D plasma exposure is observed to decrease with increasing the sample temperature. The temporal evolution of D outgassing from W is measured in a time range of ~10-420 s right after D plasma exposure. A power law fit, t-α, yields α ~ 0.34 ± 0.09, which is nearly consistent with calculated and measured values.},
doi = {10.1063/1.5034349},
journal = {Review of Scientific Instruments},
number = 10,
volume = 89,
place = {United States},
year = {2018},
month = {7}
}

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Cited by: 5 works
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