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Title: Effects of surface processes on hydrogen outgassing from metal in desorption experiments

Abstract

In this study, effects of surface processes on hydrogen outgassing during desorption experiments are investigated using a standard reaction-diffusion model describing hydrogen transport, retention and desorption in material. Three mechanisms for hydrogen migration and desorption on material surface are considered: hydrogen migration from material bulk to material surface (readsorption), hydrogen migration from material surface to material bulk (reabsorption) and hydrogen desorption from material surface by molecular recombination. Three hydrogen outgassing regimes are identified: i) recombination-limited outgassing when hydrogen recombination and desorption is fast compared to hydrogen reabsorption and slow compared to hydrogen transport from material bulk onto material surface ii) reabsorption-limited outgassing when hydrogen recombination and desorption is slow compared to hydrogen reabsorption and when the effective hydrogen recombination and desorption is slow compared to hydrogen transport from material bulk onto material surface iii) bulk-limited outgassing otherwise. Regimes of hydrogen outgassing from tungsten and beryllium are estimated for various experimental conditions. Analytical expressions of the outgassing flux are then derived for each outgassing regime, and used to characterize TDS spectra obtained in TDS experiments. It is shown that TDS spectra in recombination-limited regime are skewed toward high temperature, while TDS spectra in reabsorptionlimited and bulk-limited regimes are skewed toward lowmore » temperature. Furthermore, the temperature of the desorption peak in TDS spectra is shown to decrease in recombination-limited regime and to increase in reabsorption-limited and bulk-limited regimes as the total amount of hydrogen stored in material increases. Lastly, it is observed that the effective hydrogen recombination rate measured in reabsorption-limited permeations experiments may be not be reliably used to model and predict hydrogen retention and recycling from tungsten during plasma operations in tokamak.« less

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]
  1. Oak Ridge Associated Universities at General Atomics, San Diego, CA (United States)
  2. Univ. of California, San Diego, CA (United States)
  3. General Atomics, San Diego, CA (United States)
Publication Date:
Research Org.:
Dept. of Energy (DOE), Washington DC (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1564267
Grant/Contract Number:  
SC0018423; SC0018302
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Fusion
Additional Journal Information:
Journal Volume: 59; Journal Issue: 9; Journal ID: ISSN 0029-5515
Publisher:
IOP Science
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Guterl, Jerome, Smirnov, R. D., and Snyder, P. Effects of surface processes on hydrogen outgassing from metal in desorption experiments. United States: N. p., 2019. Web. doi:10.1088/1741-4326/ab280a.
Guterl, Jerome, Smirnov, R. D., & Snyder, P. Effects of surface processes on hydrogen outgassing from metal in desorption experiments. United States. doi:10.1088/1741-4326/ab280a.
Guterl, Jerome, Smirnov, R. D., and Snyder, P. Mon . "Effects of surface processes on hydrogen outgassing from metal in desorption experiments". United States. doi:10.1088/1741-4326/ab280a.
@article{osti_1564267,
title = {Effects of surface processes on hydrogen outgassing from metal in desorption experiments},
author = {Guterl, Jerome and Smirnov, R. D. and Snyder, P.},
abstractNote = {In this study, effects of surface processes on hydrogen outgassing during desorption experiments are investigated using a standard reaction-diffusion model describing hydrogen transport, retention and desorption in material. Three mechanisms for hydrogen migration and desorption on material surface are considered: hydrogen migration from material bulk to material surface (readsorption), hydrogen migration from material surface to material bulk (reabsorption) and hydrogen desorption from material surface by molecular recombination. Three hydrogen outgassing regimes are identified: i) recombination-limited outgassing when hydrogen recombination and desorption is fast compared to hydrogen reabsorption and slow compared to hydrogen transport from material bulk onto material surface ii) reabsorption-limited outgassing when hydrogen recombination and desorption is slow compared to hydrogen reabsorption and when the effective hydrogen recombination and desorption is slow compared to hydrogen transport from material bulk onto material surface iii) bulk-limited outgassing otherwise. Regimes of hydrogen outgassing from tungsten and beryllium are estimated for various experimental conditions. Analytical expressions of the outgassing flux are then derived for each outgassing regime, and used to characterize TDS spectra obtained in TDS experiments. It is shown that TDS spectra in recombination-limited regime are skewed toward high temperature, while TDS spectra in reabsorptionlimited and bulk-limited regimes are skewed toward low temperature. Furthermore, the temperature of the desorption peak in TDS spectra is shown to decrease in recombination-limited regime and to increase in reabsorption-limited and bulk-limited regimes as the total amount of hydrogen stored in material increases. Lastly, it is observed that the effective hydrogen recombination rate measured in reabsorption-limited permeations experiments may be not be reliably used to model and predict hydrogen retention and recycling from tungsten during plasma operations in tokamak.},
doi = {10.1088/1741-4326/ab280a},
journal = {Nuclear Fusion},
number = 9,
volume = 59,
place = {United States},
year = {2019},
month = {6}
}

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Works referenced in this record:

Temperature dependence of D atom adsorption on polycrystalline tungsten
journal, October 2013


Thermal desorption of gases
journal, July 1962


Thermal desorption from metal surfaces: A review
journal, January 1975


Towards a better understanding of hydrogen measurements obtained by thermal desorption spectroscopy using FEM modeling
journal, February 2015


Density functional study of hydrogen adsorption on beryllium (0001)
journal, August 2008


Recent analysis of key plasma wall interactions issues for ITER
journal, June 2009


Hydrogen isotope transport across tungsten surfaces exposed to a fusion relevant He ion fluence
journal, May 2017


Tungsten lamps of high efficiency — I and II
journal, October 1913

  • Langmuir, Irving; Orange, J. A.
  • Proceedings of the American Institute of Electrical Engineers, Vol. 32, Issue 10
  • DOI: 10.1109/paiee.1913.6661243

Deuterium release from implanted beryllium and beryllium oxide
journal, August 2011


On the Methodology of Thermal Desorption Spectroscopy to Evaluate Hydrogen Embrittlement
journal, January 2012


An experimental study of hydrogen adsorption on beryllium
journal, August 1990


Interaction of H 2 with (100) W. I. Binding States
journal, December 1969

  • Tamm, P. W.; Schmidt, L. D.
  • The Journal of Chemical Physics, Vol. 51, Issue 12
  • DOI: 10.1063/1.1671956

Hydrogen Permeation and Diffusion in Beryllium
journal, October 1995

  • Kizu, Kaname; Miyazaki, Keiji; Tanabe, Tetsuo
  • Fusion Technology, Vol. 28, Issue 3P2
  • DOI: 10.13182/FST95-A30573

Correlation of surface chemical states with hydrogen isotope retention in divertor tiles of JET with ITER-Like Wall
journal, July 2018


First-principles study of H on the reconstructed W(100) surface
journal, February 2010


Hydrogen dissociation on high-temperature tungsten
journal, May 2006


Binding States of Hydrogen on Tungsten
journal, June 1971

  • Tamm, P. W.; Schmidt, L. D.
  • The Journal of Chemical Physics, Vol. 54, Issue 11
  • DOI: 10.1063/1.1674753

Thermal desorption spectrometry of beryllium plasma facing tiles exposed in the JET tokamak
journal, August 2018


Simulation of irradiation induced deuterium trapping in tungsten
journal, August 2012


Quantum Modeling of Beryllium Surface Oxidation and Hydrogen Adsorption
journal, April 2011

  • Allouche, A.
  • The Journal of Physical Chemistry C, Vol. 115, Issue 16
  • DOI: 10.1021/jp2014379

Hydrogen in tungsten: Absorption, diffusion, vacancy trapping, and decohesion
journal, February 2010

  • Johnson, Donald F.; Carter, Emily A.
  • Journal of Materials Research, Vol. 25, Issue 2
  • DOI: 10.1557/JMR.2010.0036

Recent Advances on Hydrogen Retention in ITER’s Plasma-Facing Materials: Beryllium, Carbon, and Tungsten
journal, November 2008

  • Skinner, C. H.; Haasz, A. A.; Alimov, V. Kh.
  • Fusion Science and Technology, Vol. 54, Issue 4
  • DOI: 10.13182/FST54-891

Revisited reaction-diffusion model of thermal desorption spectroscopy experiments on hydrogen retention in material
journal, July 2015

  • Guterl, Jerome; Smirnov, R. D.; Krasheninnikov, S. I.
  • Journal of Applied Physics, Vol. 118, Issue 4
  • DOI: 10.1063/1.4926546

Adsorption and desorption kinetics with no precursor trapping: Hydrogen and deuterium on W {100}
journal, May 1989


Hydrogen in beryllium: Solubility, transport, and trapping
journal, April 2009


Hydrogen Storage Material Composed of Polyacetylene and LiH and Investigation of Its Mechanisms
journal, July 2014

  • Yoshida, Akihiro; Okuyama, Takashi; Mori, Yoshinori
  • Chemistry of Materials, Vol. 26, Issue 14
  • DOI: 10.1021/cm500042c

Solution and Diffusion of Hydrogen in Tungsten
journal, May 1969

  • Frauenfelder, R.
  • Journal of Vacuum Science and Technology, Vol. 6, Issue 3
  • DOI: 10.1116/1.1492699

Reaction-diffusion modeling of hydrogen transport and surface effects in application to single-crystalline Be
journal, September 2018

  • Matveev, D.; Wensing, M.; Ferry, L.
  • Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 430
  • DOI: 10.1016/j.nimb.2018.05.037

Numerical modeling of thermal desorption mass spectroscopy (TDS) for the study of hydrogen diffusion and trapping interactions in metals
journal, March 2015


Summary Abstract: Tritium solubility in high purity beryllium
journal, May 1986

  • Swansiger, W. A.
  • Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, Vol. 4, Issue 3
  • DOI: 10.1116/1.573400

The mechanism of the production of atomic hydrogen by hot tungsten
journal, December 1936

  • Roberts, J. K.; Bryce, G.
  • Mathematical Proceedings of the Cambridge Philosophical Society, Vol. 32, Issue 4
  • DOI: 10.1017/S0305004100019393

Retention mechanisms and binding states of deuterium implanted into beryllium
journal, April 2009


Hydrogen isotope retention and recycling in fusion reactor plasma-facing components
journal, February 2002


Deuterium permeation and diffusion in high-purity beryllium
journal, December 1990


A full tungsten divertor for ITER: Physics issues and design status
journal, July 2013


Hydrogen in metals studied by Thermal Desorption Spectroscopy (TDS)
journal, April 2015


D retention in Be exposed to fusion relevant mixed species D 2 He plasma
journal, August 2017


Chemisorption of Hydrogen on Tungsten (100)
journal, September 1966

  • Estrup, P. J.; Anderson, J.
  • The Journal of Chemical Physics, Vol. 45, Issue 6
  • DOI: 10.1063/1.1727919

Properties of hydrogen isotopes in the tokamak plasma-facing material beryllium
journal, July 1996


Deuterium ion-driven permeation and bulk retention in tungsten
journal, October 2011


Interaction of Hydrogen with Tungsten
journal, March 1960

  • Hickmott, T. W.
  • The Journal of Chemical Physics, Vol. 32, Issue 3
  • DOI: 10.1063/1.1730802

Desorption of hydrogen from tungsten (100)
journal, January 1984


A model for atomic hydrogen-metal interactions — application to recycling, recombination and permeation
journal, April 1985


Deuterium Transport and Trapping in Polycrystalline Tungsten
journal, March 1992

  • Anderl, R. A.; Holland, D. F.; Longhurst, G. R.
  • Fusion Technology, Vol. 21, Issue 2P2
  • DOI: 10.13182/FST92-A29837

Surface-limited hydrogen release and uptake in metals
journal, May 1988


Modeling of Multispecies Dynamics in Fusion-Related Materials with FACE
journal, January 2017

  • Smirnov, R. D.; Guterl, J.; Krasheninnikov, S. I.
  • Fusion Science and Technology, Vol. 71, Issue 1
  • DOI: 10.13182/FST16-125