A study of RF power absorption mechanisms in JET ICWC plasmas

A. Lyssoivan; D. Van Eester; R. Koch; E. Lerche; D. Douai; T. Wauters; V. Bobkov; S. Brezinsek; F. Durodie; M. Graham; E. Joffrin; A. Kreter; V. Kyrytsya; M. Maslov; M. L. Mayoral; V. Moiseenko; I. Monakhov; J. Ongena; I. Pankratov; M. K. Paul; V. Philipps; R. A. Pitts; V. Plyusnin; G. Sergienko

A study of RF power absorption mechanisms in JET ICWC plasmas

A. Lyssoivan, D. Van Eester, R. Koch, E. Lerche, D. Douai, T. Wauters, V. Bobkov, S. Brezinsek, F. Durodie, M. Graham, E. Joffrin, A. Kreter, V. Kyrytsya, M. Maslov, M. L. Mayoral, V. Moiseenko, I. Monakhov, J. Ongena, I. Pankratov, M. K. PaulV. Philipps, R. A. Pitts, V. Plyusnin, G. Sergienko

Laboratory for Plasma Physics

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

Abstract

This paper focuses on further study of the Radio-Frequency (RF) power absorption mechanisms responsible for Ion Cyclotron Wall Conditioning (ICWC) discharge ignition and sustainment in fusion machines in the presence of high toroidal magnetic field. The dominant electron collisional, ion collisional and cyclotron absorption mechanisms are analyzed during local (antenna-near) gas breakdown (ω _pe < ω ) and over-torus plasma wave excitation (ω _pe > ω) phases of RF discharge. Optimization of the absorbed RF power in terms of (i) Ez - field generation (electric field along B _T-field lines), (ii) antenna phasing and (iii) waves excitation in plasmas with multi-ion species resulted in a successful performance of the JET ICWC experiments (B _T=3.3 f,/=25 MHz) using the standard ICRF A2 antennas in a scenario envisaged at ITER full field (B _T=53 T,f=40 MHz) - i.e. with the fundamental ion cyclotron resonance (ICR) of the deuterons, ω = ω _cD+, on-axis.

Original language	English
Title of host publication	38th EPS Conference on Plasma Physics 2011, EPS 2011 - Europhysics Conference Abstracts
Pages	1164-1167
Number of pages	4
Publication status	Published - 2011
Event	38th EPS Conference on Plasma Physics 2011, EPS 2011 - Strasbourg, France Duration: 27 Jun 2011 → 1 Jul 2011

Publication series

Name	38th EPS Conference on Plasma Physics 2011, EPS 2011 - Europhysics Conference Abstracts
Volume	35 2

Conference

Conference	38th EPS Conference on Plasma Physics 2011, EPS 2011
Country/Territory	France
City	Strasbourg
Period	27/06/11 → 1/07/11

Cite this

Lyssoivan, A., Van Eester, D., Koch, R., Lerche, E., Douai, D., Wauters, T., Bobkov, V., Brezinsek, S., Durodie, F., Graham, M., Joffrin, E., Kreter, A., Kyrytsya, V., Maslov, M., Mayoral, M. L., Moiseenko, V., Monakhov, I., Ongena, J., Pankratov, I., ... Sergienko, G. (2011). A study of RF power absorption mechanisms in JET ICWC plasmas. In 38th EPS Conference on Plasma Physics 2011, EPS 2011 - Europhysics Conference Abstracts (pp. 1164-1167). (38th EPS Conference on Plasma Physics 2011, EPS 2011 - Europhysics Conference Abstracts; Vol. 35 2).

@inproceedings{a3cafbc052614a3893c1621952855fcb,

title = "A study of RF power absorption mechanisms in JET ICWC plasmas",

abstract = "This paper focuses on further study of the Radio-Frequency (RF) power absorption mechanisms responsible for Ion Cyclotron Wall Conditioning (ICWC) discharge ignition and sustainment in fusion machines in the presence of high toroidal magnetic field. The dominant electron collisional, ion collisional and cyclotron absorption mechanisms are analyzed during local (antenna-near) gas breakdown (ω pe < ω ) and over-torus plasma wave excitation (ω pe > ω) phases of RF discharge. Optimization of the absorbed RF power in terms of (i) Ez - field generation (electric field along B T-field lines), (ii) antenna phasing and (iii) waves excitation in plasmas with multi-ion species resulted in a successful performance of the JET ICWC experiments (B T=3.3 f,/=25 MHz) using the standard ICRF A2 antennas in a scenario envisaged at ITER full field (B T=53 T,f=40 MHz) - i.e. with the fundamental ion cyclotron resonance (ICR) of the deuterons, ω = ω cD+, on-axis.",

author = "A. Lyssoivan and {Van Eester}, D. and R. Koch and E. Lerche and D. Douai and T. Wauters and V. Bobkov and S. Brezinsek and F. Durodie and M. Graham and E. Joffrin and A. Kreter and V. Kyrytsya and M. Maslov and Mayoral, {M. L.} and V. Moiseenko and I. Monakhov and J. Ongena and I. Pankratov and Paul, {M. K.} and V. Philipps and Pitts, {R. A.} and V. Plyusnin and G. Sergienko",

year = "2011",

language = "English",

isbn = "9781618395931",

series = "38th EPS Conference on Plasma Physics 2011, EPS 2011 - Europhysics Conference Abstracts",

pages = "1164--1167",

booktitle = "38th EPS Conference on Plasma Physics 2011, EPS 2011 - Europhysics Conference Abstracts",

note = "38th EPS Conference on Plasma Physics 2011, EPS 2011 ; Conference date: 27-06-2011 Through 01-07-2011",

}

Lyssoivan, A, Van Eester, D, Koch, R, Lerche, E, Douai, D, Wauters, T, Bobkov, V, Brezinsek, S, Durodie, F, Graham, M, Joffrin, E, Kreter, A, Kyrytsya, V, Maslov, M, Mayoral, ML, Moiseenko, V, Monakhov, I, Ongena, J, Pankratov, I, Paul, MK, Philipps, V, Pitts, RA, Plyusnin, V & Sergienko, G 2011, A study of RF power absorption mechanisms in JET ICWC plasmas. in 38th EPS Conference on Plasma Physics 2011, EPS 2011 - Europhysics Conference Abstracts. 38th EPS Conference on Plasma Physics 2011, EPS 2011 - Europhysics Conference Abstracts, vol. 35 2, pp. 1164-1167, 38th EPS Conference on Plasma Physics 2011, EPS 2011, Strasbourg, France, 27/06/11.

A study of RF power absorption mechanisms in JET ICWC plasmas. / Lyssoivan, A.; Van Eester, D.; Koch, R. et al.
38th EPS Conference on Plasma Physics 2011, EPS 2011 - Europhysics Conference Abstracts. 2011. p. 1164-1167 (38th EPS Conference on Plasma Physics 2011, EPS 2011 - Europhysics Conference Abstracts; Vol. 35 2).

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

TY - GEN

T1 - A study of RF power absorption mechanisms in JET ICWC plasmas

AU - Lyssoivan, A.

AU - Van Eester, D.

AU - Koch, R.

AU - Lerche, E.

AU - Douai, D.

AU - Wauters, T.

AU - Bobkov, V.

AU - Brezinsek, S.

AU - Durodie, F.

AU - Graham, M.

AU - Joffrin, E.

AU - Kreter, A.

AU - Kyrytsya, V.

AU - Maslov, M.

AU - Mayoral, M. L.

AU - Moiseenko, V.

AU - Monakhov, I.

AU - Ongena, J.

AU - Pankratov, I.

AU - Paul, M. K.

AU - Philipps, V.

AU - Pitts, R. A.

AU - Plyusnin, V.

AU - Sergienko, G.

PY - 2011

Y1 - 2011

N2 - This paper focuses on further study of the Radio-Frequency (RF) power absorption mechanisms responsible for Ion Cyclotron Wall Conditioning (ICWC) discharge ignition and sustainment in fusion machines in the presence of high toroidal magnetic field. The dominant electron collisional, ion collisional and cyclotron absorption mechanisms are analyzed during local (antenna-near) gas breakdown (ω pe < ω ) and over-torus plasma wave excitation (ω pe > ω) phases of RF discharge. Optimization of the absorbed RF power in terms of (i) Ez - field generation (electric field along B T-field lines), (ii) antenna phasing and (iii) waves excitation in plasmas with multi-ion species resulted in a successful performance of the JET ICWC experiments (B T=3.3 f,/=25 MHz) using the standard ICRF A2 antennas in a scenario envisaged at ITER full field (B T=53 T,f=40 MHz) - i.e. with the fundamental ion cyclotron resonance (ICR) of the deuterons, ω = ω cD+, on-axis.

AB - This paper focuses on further study of the Radio-Frequency (RF) power absorption mechanisms responsible for Ion Cyclotron Wall Conditioning (ICWC) discharge ignition and sustainment in fusion machines in the presence of high toroidal magnetic field. The dominant electron collisional, ion collisional and cyclotron absorption mechanisms are analyzed during local (antenna-near) gas breakdown (ω pe < ω ) and over-torus plasma wave excitation (ω pe > ω) phases of RF discharge. Optimization of the absorbed RF power in terms of (i) Ez - field generation (electric field along B T-field lines), (ii) antenna phasing and (iii) waves excitation in plasmas with multi-ion species resulted in a successful performance of the JET ICWC experiments (B T=3.3 f,/=25 MHz) using the standard ICRF A2 antennas in a scenario envisaged at ITER full field (B T=53 T,f=40 MHz) - i.e. with the fundamental ion cyclotron resonance (ICR) of the deuterons, ω = ω cD+, on-axis.

UR - http://www.scopus.com/inward/record.url?scp=84867653855&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:84867653855

SN - 9781618395931

T3 - 38th EPS Conference on Plasma Physics 2011, EPS 2011 - Europhysics Conference Abstracts

SP - 1164

EP - 1167

BT - 38th EPS Conference on Plasma Physics 2011, EPS 2011 - Europhysics Conference Abstracts

T2 - 38th EPS Conference on Plasma Physics 2011, EPS 2011

Y2 - 27 June 2011 through 1 July 2011

ER -

A study of RF power absorption mechanisms in JET ICWC plasmas

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