Thermo-oxidation to remove re-deposited layers and to release trapped hydrogen isotopes in HT-7 superconducting tokamak

J. S. Hu; J. G. Li; X. M. Wang

doi:10.1016/j.jnucmat.2005.10.008

Thermo-oxidation to remove re-deposited layers and to release trapped hydrogen isotopes in HT-7 superconducting tokamak

J. S. Hu
, J. G. Li
, X. M. Wang

School of Electrical Engineering

CAS - Institute of Plasma Physics

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

Thermo-oxidation between 0.7 Pa and 32 Pa at wall temperatures of 400-470 K has been investigated in the HT-7 superconducting tokamak. During the oxidation process, deposited carbon layers were removed by the formation of CO and CO₂ and the incorporated hydrogen was released in the form of water molecules. A significant fraction of the injected oxygen was also absorbed on the walls. The overall amount of adsorbed oxygen is nearly linear with the filling pressure. The results of the thermo-oxidation experiment in HT-7 were similar to those in TEXTOR. High wall temperature and high oxygen pressure are helpful in removing carbon co-deposits and releasing trapped hydrogen.

Original language	English
Pages (from-to)	160-166
Number of pages	7
Journal	Journal of Nuclear Materials
Volume	349
Issue number	1-2
DOIs	https://doi.org/10.1016/j.jnucmat.2005.10.008
State	Published - 15 Feb 2006

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title = "Thermo-oxidation to remove re-deposited layers and to release trapped hydrogen isotopes in HT-7 superconducting tokamak",

abstract = "Thermo-oxidation between 0.7 Pa and 32 Pa at wall temperatures of 400-470 K has been investigated in the HT-7 superconducting tokamak. During the oxidation process, deposited carbon layers were removed by the formation of CO and CO2 and the incorporated hydrogen was released in the form of water molecules. A significant fraction of the injected oxygen was also absorbed on the walls. The overall amount of adsorbed oxygen is nearly linear with the filling pressure. The results of the thermo-oxidation experiment in HT-7 were similar to those in TEXTOR. High wall temperature and high oxygen pressure are helpful in removing carbon co-deposits and releasing trapped hydrogen.",

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AU - Hu, J. S.

AU - Li, J. G.

AU - Wang, X. M.

PY - 2006/2/15

Y1 - 2006/2/15

N2 - Thermo-oxidation between 0.7 Pa and 32 Pa at wall temperatures of 400-470 K has been investigated in the HT-7 superconducting tokamak. During the oxidation process, deposited carbon layers were removed by the formation of CO and CO2 and the incorporated hydrogen was released in the form of water molecules. A significant fraction of the injected oxygen was also absorbed on the walls. The overall amount of adsorbed oxygen is nearly linear with the filling pressure. The results of the thermo-oxidation experiment in HT-7 were similar to those in TEXTOR. High wall temperature and high oxygen pressure are helpful in removing carbon co-deposits and releasing trapped hydrogen.

AB - Thermo-oxidation between 0.7 Pa and 32 Pa at wall temperatures of 400-470 K has been investigated in the HT-7 superconducting tokamak. During the oxidation process, deposited carbon layers were removed by the formation of CO and CO2 and the incorporated hydrogen was released in the form of water molecules. A significant fraction of the injected oxygen was also absorbed on the walls. The overall amount of adsorbed oxygen is nearly linear with the filling pressure. The results of the thermo-oxidation experiment in HT-7 were similar to those in TEXTOR. High wall temperature and high oxygen pressure are helpful in removing carbon co-deposits and releasing trapped hydrogen.

UR - https://www.scopus.com/pages/publications/31644435183

U2 - 10.1016/j.jnucmat.2005.10.008

DO - 10.1016/j.jnucmat.2005.10.008

M3 - 文章

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SN - 0022-3115

VL - 349

SP - 160

EP - 166

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

IS - 1-2

ER -

Thermo-oxidation to remove re-deposited layers and to release trapped hydrogen isotopes in HT-7 superconducting tokamak

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