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@ARTICLE{Nardon:827421,
author = {Nardon, E. and Fil, A. and Chauveau, P. and Tamain, P. and
Guirlet, R. and Koslowski, H. R. and Lehnen, M. and Reux,
C.},
title = {{O}n the mechanisms governing gas penetration into a
tokamak plasma during a massive gas injection},
journal = {Nuclear fusion},
volume = {57},
number = {1},
issn = {1741-4326},
address = {Vienna},
publisher = {IAEA},
reportid = {FZJ-2017-01549},
pages = {016027 -},
year = {2017},
abstract = {A new 1D radial fluid code, IMAGINE, is used to simulate
the penetration of gas into a tokamak plasma during a
massive gas injection (MGI). The main result is that the gas
is in general strongly braked as it reaches the plasma, due
to mechanisms related to charge exchange and (to a smaller
extent) recombination. As a result, only a fraction of the
gas penetrates into the plasma. Also, a shock wave is
created in the gas which propagates away from the plasma,
braking and compressing the incoming gas. Simulation results
are quantitatively consistent, at least in terms of orders
of magnitude, with experimental data for a D 2 MGI into a
JET Ohmic plasma. Simulations of MGI into the background
plasma surrounding a runaway electron beam show that if the
background electron density is too high, the gas may not
penetrate, suggesting a possible explanation for the recent
results of Reux et al in JET (2015 Nucl. Fusion 55 093013).},
cin = {IEK-4},
ddc = {530},
cid = {I:(DE-Juel1)IEK-4-20101013},
pnm = {174 - Plasma-Wall-Interaction (POF3-174)},
pid = {G:(DE-HGF)POF3-174},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000388607000001},
doi = {10.1088/0029-5515/57/1/016027},
url = {https://juser.fz-juelich.de/record/827421},
}