IShTAR (Ion cyclotron Sheath Test ARrangement) is a linear magnetised plasma test facility for RF sheaths studies at the Max-Planck-Institut für Plasmaphysik in Garching. In contrast to a tokamak, a test stand provides more liberty to impose the parameters and gives better access for the instrumentation and antennas. The project will support the development of diagnostic methods for characterising RF sheaths and validate and improve theoretical predictions. The cylindrical vacuum vessel has a diameter of 1 m and is 1.1 m long. The plasma is created by an external cylindrical plasma source equipped with a helical antenna that has been designed to excite the m=1 helicon mode. In inductive mode, plasma densities and electron temperatures have been characterised with a planar Langmuir probe as a function of gas pressure and input RF power. A 2D array of RF compensated Langmuir probes and a spectrometer are planned. A single strap RF antenna has been designed; the plasma-facing surface is aligned to the cylindrical plasma to ease the modelling. The probes will allow direct measurements of plasma density profiles in front of the RF antenna, and thus a detailed study of the density modifications induced by RF sheaths, which influences the coupling. The RF antenna frequency has been chosen to study different plasma wave interactions: the accessible plasma density range includes an evanescent and propagative behaviour of slow or fast waves, and allows the study of the effect of the lower hybrid resonance layer.
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10 December 2015
RADIO FREQUENCY POWER IN PLASMAS: Proceedings of the 21st Topical Conference
27–29 April 2015
California, USA
Research Article|
December 10 2015
Studies of RF sheaths and diagnostics on IShTAR
K. Crombé;
K. Crombé
a)
1Department of Applied Physics,
Ghent University
, Ghent, Belgium
2LPP-ERM/KMS,
Royal Military Academy, Brussels
, Belgium
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S. Devaux;
S. Devaux
3
YIJL, UMR7198 CNRS-Université de Lorraine
, Nancy, France
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R. D’Inca;
R. D’Inca
4
Max-Planck-Institut für Plasmaphysik
, Garching, Germany
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E. Faudot;
E. Faudot
3
YIJL, UMR7198 CNRS-Université de Lorraine
, Nancy, France
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H. Faugel;
H. Faugel
4
Max-Planck-Institut für Plasmaphysik
, Garching, Germany
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H. Fünfgelder;
H. Fünfgelder
4
Max-Planck-Institut für Plasmaphysik
, Garching, Germany
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S. Heuraux;
S. Heuraux
3
YIJL, UMR7198 CNRS-Université de Lorraine
, Nancy, France
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J. Jacquot;
J. Jacquot
4
Max-Planck-Institut für Plasmaphysik
, Garching, Germany
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F. Louche;
F. Louche
2LPP-ERM/KMS,
Royal Military Academy, Brussels
, Belgium
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J. Moritz;
J. Moritz
3
YIJL, UMR7198 CNRS-Université de Lorraine
, Nancy, France
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R. Ochoukov;
R. Ochoukov
4
Max-Planck-Institut für Plasmaphysik
, Garching, Germany
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M. Tripsky;
M. Tripsky
2LPP-ERM/KMS,
Royal Military Academy, Brussels
, Belgium
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D. Van Eester;
D. Van Eester
2LPP-ERM/KMS,
Royal Military Academy, Brussels
, Belgium
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T. Wauters;
T. Wauters
2LPP-ERM/KMS,
Royal Military Academy, Brussels
, Belgium
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J.-M. Noterdaeme
J.-M. Noterdaeme
1Department of Applied Physics,
Ghent University
, Ghent, Belgium
4
Max-Planck-Institut für Plasmaphysik
, Garching, Germany
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a)
Corresponding author: Kristel.Crombe@UGent.be
AIP Conf. Proc. 1689, 030006 (2015)
Citation
K. Crombé, S. Devaux, R. D’Inca, E. Faudot, H. Faugel, H. Fünfgelder, S. Heuraux, J. Jacquot, F. Louche, J. Moritz, R. Ochoukov, M. Tripsky, D. Van Eester, T. Wauters, J.-M. Noterdaeme; Studies of RF sheaths and diagnostics on IShTAR. AIP Conf. Proc. 10 December 2015; 1689 (1): 030006. https://doi.org/10.1063/1.4936471
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