Estimates of RF-induced erosion at antenna-connected beryllium plasma-facing components in JET

Klepper, C. C.; Borodin, D.; Groth, M.; Lasa, A.; Airila, M.; Bobkov, V.; Colas, L.; Jacquet, P.; Kirschner, A.; Terra, A.; Biewer, T. M.; Delabie, E.; Giroud, C.

doi:10.1088/0031-8949/T167/1/014035

Title: Estimates of RF-induced erosion at antenna-connected beryllium plasma-facing components in JET

Journal Article · Mon Jan 18 00:00:00 EST 2016 · Physica Scripta

DOI:https://doi.org/10.1088/0031-8949/T167/1/014035· OSTI ID:1344255

Klepper, C. C. ^[1]; Borodin, D. ^[2]; Groth, M. ^[3]; Lasa, A. ^[1]; Airila, M. ^[4]; Bobkov, V. ^[5]; Colas, L. ^[6]; Jacquet, P. ^[7]; Kirschner, A. ^[2]; Terra, A. ^[2]; Biewer, T. M. ^[1]; Delabie, E. ^[1]; Giroud, C. ^[6]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Forschungszentrum Julich (Germany)
Aalto Univ., Otaniemi (Finland)
VTT Technical Research Centre of Finland (Finland)
Max Planck Inst. for Plasma Physics, Garching (Germany)
Alternative Energies and Atomic Energy Commission (CEA) (France)
Culham Science Centre, Abingdon (United Kingdom). Culham Centre for Fusion Energy (CCFE), EURATOM/UKAEA Fusion Association

Radio-frequency (RF)-enhanced surface erosion of beryllium (Be) plasma-facing components is explored, for the first time, using the ERO code. We applied the code in order to measure the RF-enhanced edge Be line emission at JET Be outboard limiters, in the presence of high-power, ion cyclotronresonance heating (ICRH) in L-mode discharges. In this first modelling study, the RF sheath effect from an ICRH antenna on a magnetically connected, limiter region is simulated by adding a constant potential to the local sheath, in an attempt to match measured increases in local Be I and Be II emission of factors of 2 3. It was found that such increases are readily simulated with added potentials in the range of 100 200 V, which is compatible with expected values for potentials arising from rectification of sheath voltage oscillations from ICRH antennas in the scrape-off layer plasma. We also estimated absolute erosion values within the uncertainties in local plasma conditions.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Contributing Organization:: JET Contributors8

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1344255

Alternate ID(s):: OSTI ID: 1234979

Journal Information:: Physica Scripta, Vol. T167; ISSN 0031-8949

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 15 works

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References (20)

RF sheath-enhanced beryllium sources at JET’s ICRH antennas Klepper, C. C.; Jacquet, P.; Bobkov, V. Journal of Nuclear Materials, Vol. 438 https://doi.org/10.1016/j.jnucmat.2013.01.124	journal	July 2013
Impact of calibration technique on measurement accuracy for the JET core charge-exchange system Giroud, Carine; Meigs, A. G.; Negus, C. R. Review of Scientific Instruments, Vol. 79, Issue 10 https://doi.org/10.1063/1.2974806	journal	October 2008
RF current distribution and topology of RF sheath potentials in front of ICRF antennae Colas, L.; Heuraux, S.; Brémond, S. Nuclear Fusion, Vol. 45, Issue 8 https://doi.org/10.1088/0029-5515/45/8/002	journal	July 2005
Present and future JET ICRF antennae Kaye, A.; Brown, T.; Bhatnagar, V. Fusion Engineering and Design, Vol. 24, Issue 1-2 https://doi.org/10.1016/0920-3796(94)90034-5	journal	February 1994
A multi-cavity approach for enhanced efficiency in TOPICA RF antenna code Milanesio, D.; Meneghini, O.; Lancellotti, V. Nuclear Fusion, Vol. 49, Issue 11 https://doi.org/10.1088/0029-5515/49/11/115019	journal	September 2009
Ion cyclotron resonance frequency heating in JET during initial operations with the ITER-like wall Jacquet, P.; Bobkov, V.; Colas, L. Physics of Plasmas, Vol. 21, Issue 6 https://doi.org/10.1063/1.4884354	journal	June 2014
Simulation of the plasma-wall interaction in a tokamak with the Monte Carlo code ERO-TEXTOR Kirschner, A.; Philipps, V.; Winter, J. Nuclear Fusion, Vol. 40, Issue 5 https://doi.org/10.1088/0029-5515/40/5/311	journal	May 2000
Study of physical and chemical assisted physical sputtering of beryllium in the JET ITER-like wall Brezinsek, S.; Stamp, M. F.; Nishijima, D. Nuclear Fusion, Vol. 54, Issue 10 https://doi.org/10.1088/0029-5515/54/10/103001	journal	September 2014
2-D mapping of ICRF-induced SOL perturbations in Tore Supra tokamak Colas, L.; Gunn, J. P.; Nanobashvili, I. Journal of Nuclear Materials, Vol. 363-365 https://doi.org/10.1016/j.jnucmat.2006.12.052	journal	June 2007
RF plasma edge interactions and their impact on ICRF antenna performance in Alcator C-Mod Wukitch, S. J.; Lipschultz, B.; Marmar, E. Journal of Nuclear Materials, Vol. 363-365 https://doi.org/10.1016/j.jnucmat.2007.01.273	journal	June 2007
Impact of carbon and tungsten as divertor materials on the scrape-off layer conditions in JET Groth, M.; Brezinsek, S.; Belo, P. Nuclear Fusion, Vol. 53, Issue 9 https://doi.org/10.1088/0029-5515/53/9/093016	journal	August 2013
Target particle and heat loads in low-triangularity L-mode plasmas in JET with carbon and beryllium/tungsten walls Groth, M.; Brezinsek, S.; Belo, P. Journal of Nuclear Materials, Vol. 438 https://doi.org/10.1016/j.jnucmat.2013.01.072	journal	July 2013
Models and Numerics in the Multi-Fluid 2-D Edge Plasma Code EDGE2D/U Simonini, R.; Corrigan, G.; Radford, G. Contributions to Plasma Physics, Vol. 34, Issue 2-3 https://doi.org/10.1002/ctpp.2150340242	journal	January 1994
Progress in two-dimensional plasma edge modelling Reiter, D. Journal of Nuclear Materials, Vol. 196-198 https://doi.org/10.1016/S0022-3115(06)80014-0	journal	December 1992
Preliminary Monte Carlo simulation of beryllium migration during JET ITER-like wall divertor operation Airila, M. I.; Järvinen, A.; Groth, M. Journal of Nuclear Materials, Vol. 463 https://doi.org/10.1016/j.jnucmat.2014.09.010	journal	August 2015
Modelling of power deposition on the JET ITER like wall using the code PFCFLux Firdaouss, M.; Riccardo, V.; Martin, V. Journal of Nuclear Materials, Vol. 438 https://doi.org/10.1016/j.jnucmat.2013.01.111	journal	July 2013
Radio-frequency sheaths physics: Experimental characterization on Tore Supra and related self-consistent modeling Jacquot, Jonathan; Milanesio, Daniele; Colas, Laurent Physics of Plasmas, Vol. 21, Issue 6 https://doi.org/10.1063/1.4884778	journal	June 2014
Spectroscopic measurements of Be erosion at JET ILW and interpretation with ERO modelling Borodin, D.; Stamp, M. F.; Kirschner, A. Journal of Nuclear Materials, Vol. 438 https://doi.org/10.1016/j.jnucmat.2013.01.043	journal	July 2013
Physics and engineering results obtained with the ion cyclotron range of frequencies ITER-like antenna on JET Durodié, F.; Nightingale, M. P. S.; Mayoral, M-L Plasma Physics and Controlled Fusion, Vol. 54, Issue 7 https://doi.org/10.1088/0741-3335/54/7/074012	journal	June 2012
Impurity production from the ion cyclotron resonance heating antennas in JET Czarnecka, A.; Durodié, F.; Figueiredo, A. C. A. Plasma Physics and Controlled Fusion, Vol. 54, Issue 7 https://doi.org/10.1088/0741-3335/54/7/074013	journal	June 2012

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Numerical model of the radio-frequency magnetic presheath including wall impurities Elias, M.; Curreli, D.; Jenkins, T. G. Physics of Plasmas, Vol. 26, Issue 9 https://doi.org/10.1063/1.5109256	journal	September 2019
Overview of the JET results in support to ITER Litaudon, X.; Abduallev, S.; Abhangi, M. Nuclear Fusion, Vol. 57, Issue 10 https://doi.org/10.1088/1741-4326/aa5e28	journal	June 2017

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