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

Title: Reduced deuterium retention in simultaneously damaged and annealed tungsten

Journal Article · · Journal of Nuclear Materials
 [1];  [2];  [3];  [1];  [1];  [1];  [4]
  1. Univ. of California, San Diego, CA (United States). Center for Energy Research
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Sandia National Lab. (SNL-CA), Livermore, CA (United States). Energy Innovation Dept.
  4. Univ. of California, San Diego, CA (United States). Center for Energy Research. Dept. of Mechanical and Aerospace Engineering (MAE)

Deuterium (D) retention in polycrystalline tungsten (W) with copper (Cu) ion damage concurrently produced at elevated surface temperature is investigated in this paper. An in situ heated stage held W samples at a controlled temperature up to 1243 K, which were subjected to displacement damage produced by 3.4 MeV Cu ions. D retention is subsequently explored by exposure of the W samples held at 383 K to a D2 plasma ion fluence of 1024 D+/m2. Nuclear reaction analysis (NRA), utilizing the D(3He,p)4He nuclear reaction, is used to probe the D concentration in the near surface up to 6 μm. Thermal desorption spectroscopy (TDS) is used to measure outgassed HD and D2 molecules to determine the bulk D concentration. Both NRA and TDS measure a significant reduction in D retention for samples damaged at elevated temperature. TDS quantitatively shows that the lowest energy trap remains largely unaffected while higher energy traps, induced by Cu ions, are annealed and approach intrinsic concentrations as the temperature during ion damage approaches 1243 K. Finally, analysis of TDS data yields an activation energy of (0.10 ± 0.02) eV for recovery of ion-damage induced traps at elevated temperature.

Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Univ. of California, San Diego, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Fusion Energy Sciences (FES); Univ. of California (United States)
Grant/Contract Number:
AC52-06NA25396; FG02-07ER54912; SC0001999; 12-LR-237801
OSTI ID:
1440451
Alternate ID(s):
OSTI ID: 1550188
Report Number(s):
LA-UR-18-21487; TRN: US1900740
Journal Information:
Journal of Nuclear Materials, Vol. 494; ISSN 0022-3115
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 20 works
Citation information provided by
Web of Science

References (22)

Recent Advances on Hydrogen Retention in ITER’s Plasma-Facing Materials: Beryllium, Carbon, and Tungsten journal November 2008
Plasma facing and high heat flux materials – needs for ITER and beyond journal December 2002
Reduced deuterium retention in self-damaged tungsten exposed to high-flux plasmas at high surface temperatures journal March 2013
The influence of radiation damage on the plasma-induced deuterium retention in self-implanted tungsten journal August 2011
Annealing effects on deuterium retention behavior in damaged tungsten journal December 2016
Annealing of radiation-induced damage in tungsten under and after irradiation with 20MeV self-ions journal August 2014
Solution and Diffusion of Hydrogen in Tungsten journal May 1969
On the use of SRIM for computing radiation damage exposure journal September 2013
Deuterium retention in tungsten after heavy ion damage and hydrogen isotope exchange in PISCES journal August 2014
Characterization of an azimuthally symmetric helicon wave high density plasma source
  • Tynan, G. R.; Bailey, A. D.; Campbell, G. A.
  • Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, Vol. 15, Issue 6 https://doi.org/10.1116/1.580844
journal November 1997
Control of plasma parameters by using noble gas admixtures
  • Taylor, Kurt J.; Yun, Seokmin; Tynan, George R.
  • Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, Vol. 22, Issue 5 https://doi.org/10.1116/1.1772375
journal September 2004
Quantitative depth profiling of deuterium up to very large depths journal February 2009
SIMNRA, a simulation program for the analysis of NRA, RBS and ERDA
  • Mayer, M.
  • The fifteenth international conference on the application of accelerators in research and industry, AIP Conference Proceedings https://doi.org/10.1063/1.59188
conference January 1999
Statistically sound evaluation of trace element depth profiles by ion beam analysis journal June 2012
Deuterium retention in tungsten in dependence of the surface conditions journal March 2003
Modelling deuterium release during thermal desorption of D+-irradiated tungsten journal March 2008
Recovery temperatures of defects in tungsten created by self-implantation journal August 2015
Void growth and thermal desorption of deuterium from voids in tungsten journal September 1994
Activation energy for long-range migration of self-interstitial atoms in tungsten obtained by direct measurement of radiation-induced point-defect clusters journal February 2011
Neutron irradiation and defect recovery of tungsten journal March 1970
First temperature stage evolution of irradiation-induced defects in tungsten studied by positron annihilation spectroscopy journal May 2008
High temperature annealing of ion irradiated tungsten journal May 2015

Cited By (2)