Experiments to measure hydrogen release from graphite walls during disruptions in DIII-D

Spectroscopy and wall tile bake-out measurements are performed in the DIII-D tokamak to estimate the amount of hydrogen stored in and released from the walls during disruptions. Both naturally occurring disruptions and disruptions induced by massive gas injection (MGI) are investigated. The measurem...

Full description

Saved in:
Bibliographic Details
Published in:Journal of nuclear materials 2009-06, Vol.390, p.597-601
Main Authors: Hollmann, E.M., Pablant, N.A., Rudakov, D.L., Boedo, J.A., Brooks, N.H., Jernigan, T.C., Pigarov, A.Yu
Format: Article
Language:English
Subjects:
Applied sciences
Controled nuclear fusion plants
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Fission nuclear power plants
Fuels
Installations for energy generation and conversion: thermal and electrical energy
Nuclear fuels
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Spectroscopy and wall tile bake-out measurements are performed in the DIII-D tokamak to estimate the amount of hydrogen stored in and released from the walls during disruptions. Both naturally occurring disruptions and disruptions induced by massive gas injection (MGI) are investigated. The measurements indicate that both types of disruptions cause a net release of order 10 21 hydrogen (or deuterium) atoms from the graphite walls. This is comparable to the pre-disruptions plasma particle inventory, so the released hydrogen is important for accurate modeling of disruptions. However, the amount of hydrogen released is small compared to the total saturated wall inventory of order 10 22–10 23, so it appears that many disruptions are necessary to provide full pump-out of the vessel walls.
ISSN:0022-3115
1873-4820
DOI:10.1016/j.jnucmat.2009.01.124