Studies of RF sheaths and diagnostics on IShTAR

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

doi:10.1063/1.4936471

Studies of RF sheaths and diagnostics on IShTAR

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

Laboratory for Plasma Physics

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

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.

Original language	English
Title of host publication	Radio Frequency Power in Plasmas
Subtitle of host publication	Proceedings of the 21St Topical Conference
Editors	Robert I. Pinsker
Publisher	American Institute of Physics Inc.
ISBN (Electronic)	9780735413368
DOIs	https://doi.org/10.1063/1.4936471
Publication status	Published - 10 Dec 2015
Event	21st Topical Conference on Radiofrequency Power in Plasmas - Lake Arrowhead, United States Duration: 27 Apr 2015 → 29 Apr 2015

Publication series

Name	AIP Conference Proceedings
Volume	1689
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Conference

Conference	21st Topical Conference on Radiofrequency Power in Plasmas
Country/Territory	United States
City	Lake Arrowhead
Period	27/04/15 → 29/04/15

Access to Document

10.1063/1.4936471

Cite this

Crombé, K., Devaux, S., D'Inca, R., Faudot, E., Faugel, H., Fünfgelder, H., Heuraux, S., Jacquot, J., Louche, F., Moritz, J., Ochoukov, R., Tripsky, M., Van Eester, D., Wauters, T., & Noterdaeme, J. M. (2015). Studies of RF sheaths and diagnostics on IShTAR. In R. I. Pinsker (Ed.), Radio Frequency Power in Plasmas: Proceedings of the 21St Topical Conference Article 030006 (AIP Conference Proceedings; Vol. 1689). American Institute of Physics Inc.. https://doi.org/10.1063/1.4936471

@inproceedings{6fd64c1bc3b24af09c4a08f15bb35f7b,

title = "Studies of RF sheaths and diagnostics on IShTAR",

abstract = "IShTAR (Ion cyclotron Sheath Test ARrangement) is a linear magnetised plasma test facility for RF sheaths studies at the Max-Planck-Institut f{\"u}r 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.",

author = "K. Cromb{\'e} and S. Devaux and R. D'Inca and E. Faudot and H. Faugel and H. F{\"u}nfgelder and S. Heuraux and J. Jacquot and F. Louche and J. Moritz and R. Ochoukov and M. Tripsky and {Van Eester}, D. and T. Wauters and Noterdaeme, {J. M.}",

note = "Funding Information: The authors want to thank the technical staff at IPP-Garching and LPP-ERM/KMS, in particular F. Fischer, G. Siegl and M. Berte. The work received support from the Research Foundation Flanders (G0B3115N). This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014-2018 under grant agreement No 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission.The views and opinions expressed herein do not necessarily reflect those of the European Commission.; 21st Topical Conference on Radiofrequency Power in Plasmas ; Conference date: 27-04-2015 Through 29-04-2015",

year = "2015",

month = dec,

day = "10",

doi = "10.1063/1.4936471",

language = "English",

series = "AIP Conference Proceedings",

publisher = "American Institute of Physics Inc.",

editor = "Pinsker, {Robert I.}",

booktitle = "Radio Frequency Power in Plasmas",

}

Crombé, K, Devaux, S, D'Inca, R, Faudot, E, Faugel, H, Fünfgelder, H, Heuraux, S, Jacquot, J, Louche, F, Moritz, J, Ochoukov, R, Tripsky, M, Van Eester, D, Wauters, T & Noterdaeme, JM 2015, Studies of RF sheaths and diagnostics on IShTAR. in RI Pinsker (ed.), Radio Frequency Power in Plasmas: Proceedings of the 21St Topical Conference., 030006, AIP Conference Proceedings, vol. 1689, American Institute of Physics Inc., 21st Topical Conference on Radiofrequency Power in Plasmas, Lake Arrowhead, United States, 27/04/15. https://doi.org/10.1063/1.4936471

Studies of RF sheaths and diagnostics on IShTAR. / Crombé, K.; Devaux, S.; D'Inca, R. et al.
Radio Frequency Power in Plasmas: Proceedings of the 21St Topical Conference. ed. / Robert I. Pinsker. American Institute of Physics Inc., 2015. 030006 (AIP Conference Proceedings; Vol. 1689).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Studies of RF sheaths and diagnostics on IShTAR

AU - Crombé, K.

AU - Devaux, S.

AU - D'Inca, R.

AU - Faudot, E.

AU - Faugel, H.

AU - Fünfgelder, H.

AU - Heuraux, S.

AU - Jacquot, J.

AU - Louche, F.

AU - Moritz, J.

AU - Ochoukov, R.

AU - Tripsky, M.

AU - Van Eester, D.

AU - Wauters, T.

AU - Noterdaeme, J. M.

N1 - Funding Information: The authors want to thank the technical staff at IPP-Garching and LPP-ERM/KMS, in particular F. Fischer, G. Siegl and M. Berte. The work received support from the Research Foundation Flanders (G0B3115N). This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014-2018 under grant agreement No 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission.The views and opinions expressed herein do not necessarily reflect those of the European Commission.

PY - 2015/12/10

Y1 - 2015/12/10

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=84984578469&partnerID=8YFLogxK

U2 - 10.1063/1.4936471

DO - 10.1063/1.4936471

M3 - Conference contribution

AN - SCOPUS:84984578469

T3 - AIP Conference Proceedings

BT - Radio Frequency Power in Plasmas

A2 - Pinsker, Robert I.

PB - American Institute of Physics Inc.

T2 - 21st Topical Conference on Radiofrequency Power in Plasmas

Y2 - 27 April 2015 through 29 April 2015

ER -

Studies of RF sheaths and diagnostics on IShTAR

Abstract

Publication series

Conference

Access to Document

Other files and links

Fingerprint

Cite this