This title appears in the Scientific Report :
2011
Please use the identifier:
http://dx.doi.org/10.1088/0029-5515/51/8/083033 in citations.
Fuelling efficiency of massive gas injection in TEXTOR: mass scaling and importance of gas flow dynamics
Fuelling efficiency of massive gas injection in TEXTOR: mass scaling and importance of gas flow dynamics
Fuelling efficiency is an important parameter in designing a massive gas injection system for suppression of runaway electrons in ITER. In this work Z-dependence of fuelling efficiency is measured for TEXTOR. The dependence covers the following gases: He, Ne, Ar, Kr, Xe and a 10% Ar-D2 mixture. It i...
Saved in:
Personal Name(s): | Bozhenkov, S.A. |
---|---|
Lehnen, M. / Finken, K.H. / Bertschinger, G. / Koslowski, H.R. / Reiter, D. / Wolf, R.C. | |
Contributing Institute: |
Plasmaphysik; IEK-4 |
Published in: | Nuclear fusion, 51 (2011) S. 083033 |
Imprint: |
Vienna
IAEA
2011
|
Physical Description: |
083033 |
DOI: |
10.1088/0029-5515/51/8/083033 |
Document Type: |
Journal Article |
Research Program: |
Fusion |
Series Title: |
Nuclear Fusion
51 |
Subject (ZB): | |
Publikationsportal JuSER |
Fuelling efficiency is an important parameter in designing a massive gas injection system for suppression of runaway electrons in ITER. In this work Z-dependence of fuelling efficiency is measured for TEXTOR. The dependence covers the following gases: He, Ne, Ar, Kr, Xe and a 10% Ar-D2 mixture. It is shown that the fuelling efficiency significantly decreases with the gas mass, from above 0.5 for He to below 0.03 for Xe.To explain the variation of the efficiency with the gas mass and pressure a simple model of gas flow from the valve to the plasma edge is developed. The flow model is validated using available laboratory flow measurements of a TEXTOR-like injection system. An unsteady gas flow and a premature plasma disruption are shown to explain the mass dependence of the efficiency. |