skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

This content will become publicly available on July 15, 2020

Title: Time-resolved laser-induced desorption spectroscopy (LIDS) for quantified in-situ hydrogen isotope retention measurement and removal from plasma facing materials

Abstract

A laboratory scale laser induced thermal desorption spectroscopy system is developed and tested on tungsten-deuterium and titanium-deuterium codeposits, and its feasibility as a hydrogenic inventory measurement diagnostic is demonstrated over a range of retention values from 5 × 10 19 m -2 to 7 × 10 23 m -2 for absorbed laser power densities as low as 8 MW m -2. Codeposit layer samples are grown by magnetron sputtering and immersed in a weak argon rf plasma. A 1 kW fiber laser (λ = 1100 nm) heats the samples up to a peak surface temperature ranging from 900 to 1500 K using pulse widths of 0.5 and 1 s. Spectral line emission from Balmer series Dα and Hα from thermally desorbed deuterium and hydrogen, as well as line emission from argon, are monitored as a function of time using an optical spectrometer with maximum temporal resolution of 1 ms. To correct for wall recycling and pumping speed, and to accurately measure the time evolution of the laser-induced thermal desorption, the raw Dα signal is deconvolved with the system response function, which is obtained by injecting a short burst of D 2 to approximate an impulse. Calibration is done with amore » standard D 2 leak, and laser induced desorption spectroscopy deuterium retention values are found to be in good agreement with companion measurements made using conventional temperature programmed desorption on samples from the same codeposit batch.« less

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [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), Fusion Energy Sciences (FES) (SC-24)
OSTI Identifier:
1597939
Alternate Identifier(s):
OSTI ID: 1542526
Grant/Contract Number:  
[SC0018281]
Resource Type:
Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
[ Journal Volume: 90; Journal Issue: 7]; Journal ID: ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Yu, J. H., Baldwin, M. J., Simmonds, M. J., and Založnik, A. Time-resolved laser-induced desorption spectroscopy (LIDS) for quantified in-situ hydrogen isotope retention measurement and removal from plasma facing materials. United States: N. p., 2019. Web. doi:10.1063/1.5100162.
Yu, J. H., Baldwin, M. J., Simmonds, M. J., & Založnik, A. Time-resolved laser-induced desorption spectroscopy (LIDS) for quantified in-situ hydrogen isotope retention measurement and removal from plasma facing materials. United States. doi:10.1063/1.5100162.
Yu, J. H., Baldwin, M. J., Simmonds, M. J., and Založnik, A. Mon . "Time-resolved laser-induced desorption spectroscopy (LIDS) for quantified in-situ hydrogen isotope retention measurement and removal from plasma facing materials". United States. doi:10.1063/1.5100162.
@article{osti_1597939,
title = {Time-resolved laser-induced desorption spectroscopy (LIDS) for quantified in-situ hydrogen isotope retention measurement and removal from plasma facing materials},
author = {Yu, J. H. and Baldwin, M. J. and Simmonds, M. J. and Založnik, A.},
abstractNote = {A laboratory scale laser induced thermal desorption spectroscopy system is developed and tested on tungsten-deuterium and titanium-deuterium codeposits, and its feasibility as a hydrogenic inventory measurement diagnostic is demonstrated over a range of retention values from 5 × 1019 m-2 to 7 × 1023 m-2 for absorbed laser power densities as low as 8 MW m-2. Codeposit layer samples are grown by magnetron sputtering and immersed in a weak argon rf plasma. A 1 kW fiber laser (λ = 1100 nm) heats the samples up to a peak surface temperature ranging from 900 to 1500 K using pulse widths of 0.5 and 1 s. Spectral line emission from Balmer series Dα and Hα from thermally desorbed deuterium and hydrogen, as well as line emission from argon, are monitored as a function of time using an optical spectrometer with maximum temporal resolution of 1 ms. To correct for wall recycling and pumping speed, and to accurately measure the time evolution of the laser-induced thermal desorption, the raw Dα signal is deconvolved with the system response function, which is obtained by injecting a short burst of D2 to approximate an impulse. Calibration is done with a standard D2 leak, and laser induced desorption spectroscopy deuterium retention values are found to be in good agreement with companion measurements made using conventional temperature programmed desorption on samples from the same codeposit batch.},
doi = {10.1063/1.5100162},
journal = {Review of Scientific Instruments},
number = [7],
volume = [90],
place = {United States},
year = {2019},
month = {7}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on July 15, 2020
Publisher's Version of Record

Citation Metrics:
Cited by: 1 work
Citation information provided by
Web of Science

Save / Share:

Works referenced in this record:

Implications of PMI and wall material choice on fusion reactor tritium self-sufficiency
journal, January 2019


A note on the 3He + D nuclear-reaction cross section
journal, January 1980


The role and application of ion beam analysis for studies of plasma-facing components in controlled fusion devices
journal, March 2016

  • Rubel, Marek; Petersson, Per; Alves, Eduardo
  • Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 371
  • DOI: 10.1016/j.nimb.2015.09.077

Development of laser-based techniques for in situ characterization of the first wall in ITER and future fusion devices
journal, August 2013


Development of laser-based diagnostics for surface characterisation of wall components in fusion devices
journal, October 2011


Laser techniques implementation for wall surface characterization and conditioning
journal, December 2009


Development of a LIBS system for in situ surface measurements during plasma exposure in PISCES-A
journal, October 2018

  • Nishijima, D.; Patino, M.; Doerner, R. P.
  • Review of Scientific Instruments, Vol. 89, Issue 10
  • DOI: 10.1063/1.5034349

In-situ tokamak laser applications for detritiation and co-deposited layers studies
journal, June 2007


Review of LIBS application in nuclear fusion technology
journal, September 2016


Analysis of deposited layers on plasma facing components by laser-induced breakdown spectroscopy: Towards ITER tritium inventory diagnostics
journal, August 2011


LIBS for tokamak plasma facing components characterisation: Perspectives on in situ tritium cartography
journal, August 2013

  • Semerok, A.; Grisolia, C.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 720
  • DOI: 10.1016/j.nima.2012.12.042

LIBS analysis of tungsten coatings exposed to Magnum PSI ELM-like plasma
journal, August 2015


Development of laser induced breakdown spectroscopy for studying erosion, deposition, and fuel retention in ASDEX Upgrade
journal, October 2015


Time resolved imaging of laser induced ablation spectroscopy (LIAS) in TEXTOR and comparison with modeling
journal, January 2016


In situ measurement of hydrogen retention in JET carbon tiles
journal, March 2001


In situ detection of hydrogen retention in TEXTOR by laser induced desorption
journal, June 2009


In situ measurements of fuel retention by laser induced desorption spectroscopy in TEXTOR
journal, December 2011


Laser induced desorption as tritium retention diagnostic method in ITER
journal, October 2011


Laser‐induced desorption of gas from metallic surfaces
journal, November 1975

  • Schwirzke, F.; Brinkschulte, H.; Hashmi, M.
  • Journal of Applied Physics, Vol. 46, Issue 11
  • DOI: 10.1063/1.321525

Hydrogen trapping and re-emission in TiB2 coatings for tokamaks upon thermal, pulsed electron and laser annealing
journal, December 1979


Tritium removal from JET and TFTR tiles by a scanning laser
journal, March 2003


Application of pulsed laser irradiation for removal of hydrogen retained in tungsten
journal, November 2013


In situ diagnostic for monitoring of deuterium and tritium in re-deposited carbon layers by laser induced desorption
journal, June 2007


Hydrogen retention in tungsten materials studied by Laser Induced Desorption
journal, July 2013


Deuterium desorption from tungsten using laser heating
journal, August 2017


Recycling processes in tokamaks
journal, September 1978


Cracking and surface roughening of beryllium–tungsten alloy due to transient heating
journal, September 2017


The effect of transient temporal pulse shape on surface temperature and tungsten damage
journal, August 2015


Thermal decomposition of titanium hydride and its application to low pressure hydrogen control
journal, January 1984

  • Hirooka, Yoshihiko
  • Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, Vol. 2, Issue 1
  • DOI: 10.1116/1.572617

Efficiency of thermal outgassing for tritium retention measurement and removal in ITER
journal, August 2017