Calculation of RF sheath properties from surface wave-fields: a post-processing method

Myra, J. R.; Kohno, H.

doi:10.1088/1361-6587/ab2f41

Calculation of RF sheath properties from surface wave-fields: a post-processing method

Journal Article · Tue Jul 23 00:00:00 EDT 2019 · Plasma Physics and Controlled Fusion

DOI:https://doi.org/10.1088/1361-6587/ab2f41· OSTI ID:1593817

^[1]; ^[2]

Lodestar Research Corporation, Boulder, CO (United States); Lodestar Research Corporation
Kyushu Inst. of Technology, Iizuka, Fukuoka (Japan)

In ion cyclotron range of frequency (ICRF) experiments in fusion research devices, radio frequency (RF) sheaths form where plasma, strong RF wave fields and material surfaces coexist. These RF sheaths affect plasma material interactions such as sputtering and localized power deposition, as well as the global RF wave fields themselves. RF sheaths may be modeled by employing a sheath boundary condition (BC) in place of the more customary conducting wall BC; however, there are still many ICRF computer codes that do not implement the sheath BC. In this paper we present a method for post-processing results obtained with the conducting wall BC. The post-processing method produces results that are equivalent to those that would have been obtained with the RF sheath BC, under certain assumptions. We found the post-processing method is also useful for verification of sheath BC implementations and as a guide to interpretation and understanding of the role of RF sheaths and their interactions with the waves that drive them.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC); Lodestar Research Corporation, Boulder, CO (United States); Univ. of California, Oakland, CA (United States)

Sponsoring Organization:: Japan Society for the Promotion of Science (JSPS); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Scientific User Facilities Division; USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)

Grant/Contract Number:: AC02-05CH11231; AC05-00OR22725

OSTI ID:: 1593817

Alternate ID(s):: OSTI ID: 23004083

Report Number(s):: DOE-ER--54392-94; LRC--19-180; ORNL--4000158507-3; LRC-19-180

Journal Information:: Plasma Physics and Controlled Fusion, Journal Name: Plasma Physics and Controlled Fusion Journal Issue: 9 Vol. 61; ISSN 0741-3335

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

References (37)

A finite element procedure for radio-frequency sheath–plasma interactions based on a sheath impedance model Kohno, H.; Myra, J. R. Computer Physics Communications, Vol. 220 https://doi.org/10.1016/j.cpc.2017.06.025	journal	November 2017
The role of rectified currents in far-field RF sheaths and in SOL losses of HHFW power on NSTX Perkins, R. J.; Hosea, J. C.; Jaworski, M. A. Nuclear Materials and Energy, Vol. 12 https://doi.org/10.1016/j.nme.2017.04.013	journal	August 2017
A post-processing method to simulate the generalized RF sheath boundary condition Myra, James R.; Kohno, Haruhiko EPJ Web of Conferences, Vol. 157 https://doi.org/10.1051/epjconf/201715703037	journal	January 2017
Edge plasma density convection during ion cyclotron resonance heating on Tore Supra Bécoulet, M.; Colas, L.; Pécoul, S. Physics of Plasmas, Vol. 9, Issue 6 https://doi.org/10.1063/1.1472501	journal	June 2002
A radio-frequency sheath boundary condition and its effect on slow wave propagation D’Ippolito, D. A.; Myra, J. R. Physics of Plasmas, Vol. 13, Issue 10 https://doi.org/10.1063/1.2360507	journal	October 2006
Numerical analysis of radio-frequency sheath-plasma interactions in the ion cyclotron range of frequencies Kohno, H.; Myra, J. R.; D’Ippolito, D. A. Physics of Plasmas, Vol. 19, Issue 1 https://doi.org/10.1063/1.3677262	journal	January 2012
Self consistent radio-frequency wave propagation and peripheral direct current plasma biasing: Simplified three dimensional non-linear treatment in the “wide sheath” asymptotic regime Colas, L.; Jacquot, J.; Heuraux, S. Physics of Plasmas, Vol. 19, Issue 9 https://doi.org/10.1063/1.4750046	journal	September 2012
Characterization and performance of a field aligned ion cyclotron range of frequency antenna in Alcator C-Mod Wukitch, S. J.; Garrett, M. L.; Ochoukov, R. Physics of Plasmas, Vol. 20, Issue 5 https://doi.org/10.1063/1.4803882	journal	May 2013
Radio-frequency sheath-plasma interactions with magnetic field tangency points along the sheath surface Kohno, H.; Myra, J. R.; D'Ippolito, D. A. Physics of Plasmas, Vol. 20, Issue 8 https://doi.org/10.1063/1.4818991	journal	August 2013
Quantitative modeling of ICRF antennas with integrated time domain RF sheath and plasma physics Smithe, David N.; D'Ippolito, Daniel A.; Myra, James R. RADIOFREQUENCY POWER IN PLASMAS: Proceedings of the 20th Topical Conference, AIP Conference Proceedings https://doi.org/10.1063/1.4864506	conference	January 2014
ICRF-enhanced plasma potentials in the SOL of Alcator C-Mod Ochoukov, R.; Whyte, D. G.; Brunner, D. RADIOFREQUENCY POWER IN PLASMAS: Proceedings of the 20th Topical Conference, AIP Conference Proceedings https://doi.org/10.1063/1.4864539	conference	January 2014
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
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
Progress on ion cyclotron range of frequencies heating physics and technology in support of the International Tokamak Experimental Reactor Wilson, J. R.; Bonoli, P. T. Physics of Plasmas, Vol. 22, Issue 2 https://doi.org/10.1063/1.4901090	journal	November 2014
Radio frequency sheaths in an oblique magnetic field Myra, J. R.; D'Ippolito, D. A. Physics of Plasmas, Vol. 22, Issue 6 https://doi.org/10.1063/1.4922848	journal	June 2015
Physics-based parametrization of the surface impedance for radio frequency sheaths Myra, J. R. Physics of Plasmas, Vol. 24, Issue 7 https://doi.org/10.1063/1.4990373	journal	July 2017
Radio-frequency wave interactions with a plasma sheath in oblique-angle magnetic fields using a sheath impedance model Kohno, H.; Myra, J. R. Physics of Plasmas, Vol. 26, Issue 2 https://doi.org/10.1063/1.5054920	journal	February 2019
Radio frequency wave interactions with a plasma sheath: The role of wave and plasma sheath impedances Myra, J. R.; Kohno, H. Physics of Plasmas, Vol. 26, Issue 5 https://doi.org/10.1063/1.5088343	journal	May 2019
Radio‐frequency‐sheath‐driven edge plasma convection and interaction with the H mode D’Ippolito, D. A.; Myra, J. R.; Jacquinot, J. Physics of Fluids B: Plasma Physics, Vol. 5, Issue 10 https://doi.org/10.1063/1.860832	journal	October 1993
Power deposition in high‐density inductively coupled plasma tools for semiconductor processing Jaeger, E. F.; Berry, L. A.; Tolliver, J. S. Physics of Plasmas, Vol. 2, Issue 6 https://doi.org/10.1063/1.871222	journal	June 1995
Radiofrequency sheaths and impurity generation by ICRF antennas Perkins, F. W. Nuclear Fusion, Vol. 29, Issue 4 https://doi.org/10.1088/0029-5515/29/4/004	journal	April 1989
Faraday screen sheaths and impurity production during ion cyclotron heating Myra, J. R.; D'Ippolito, D. A.; Gerver, M. J. Nuclear Fusion, Vol. 30, Issue 5 https://doi.org/10.1088/0029-5515/30/5/004	journal	May 1990
Hot spot phenomena on Tore Supra ICRF antennas investigated by optical diagnostics Colas, L.; Costanzo, L.; Desgranges, C. Nuclear Fusion, Vol. 43, Issue 1 https://doi.org/10.1088/0029-5515/43/1/301	journal	December 2002
Characterization of heat flux generated by ICRH heating with cantilevered bars and a slotted box Faraday screen Corre, Y.; Firdaouss, M.; Colas, L. Nuclear Fusion, Vol. 52, Issue 10 https://doi.org/10.1088/0029-5515/52/10/103010	journal	August 2012
The interaction between waves in the ion cyclotron range of frequencies and the plasma boundary Noterdaeme, J. -M; Oost, G. Van Plasma Physics and Controlled Fusion, Vol. 35, Issue 11 https://doi.org/10.1088/0741-3335/35/11/001	journal	November 1993
ICRF-enhanced plasma potentials in the SOL of Alcator C-Mod Ochoukov, R.; Whyte, D. G.; Brunner, D. Plasma Physics and Controlled Fusion, Vol. 56, Issue 1 https://doi.org/10.1088/0741-3335/56/1/015004	journal	December 2013
Making ICRF power compatible with a high-Z wall in ASDEX Upgrade Bobkov, V.; Aguiam, D.; Bilato, R. Plasma Physics and Controlled Fusion, Vol. 59, Issue 1 https://doi.org/10.1088/0741-3335/59/1/014022	journal	October 2016
Spatial proximity effects on the excitation of sheath RF voltages by evanescent slow waves in the ion cyclotron range of frequencies Colas, Laurent; Lu, Ling-Feng; Křivská, Alena Plasma Physics and Controlled Fusion, Vol. 59, Issue 2 https://doi.org/10.1088/1361-6587/59/2/025014	journal	January 2017
Characterization of SOL plasma flows and potentials in ICRF-heated plasmas in Alcator C-mod Hong, R.; Wukitch, S. J.; Lin, Y. Plasma Physics and Controlled Fusion, Vol. 59, Issue 10 https://doi.org/10.1088/1361-6587/aa7f4b	journal	August 2017
Nonlinear plasma sheath potential in the ASDEX Upgrade 3-strap antenna: a parameter scan Tierens, W.; Jacquot, J.; Bobkov, V. Nuclear Fusion, Vol. 57, Issue 11 https://doi.org/10.1088/1741-4326/aa7f9e	journal	August 2017
Experimental Observation of Convective Cell Formation due to a Fast Wave Antenna in the Large Plasma Device Martin, M. J.; Gekelman, W.; Van Compernolle, B. Physical Review Letters, Vol. 119, Issue 20 https://doi.org/10.1103/PhysRevLett.119.205002	journal	November 2017
Plasma Resonance in a Radio-Frequency Probe Takayama, K.; Ikegami, H.; Miyazaki, S. Physical Review Letters, Vol. 5, Issue 6 https://doi.org/10.1103/PhysRevLett.5.238	journal	September 1960
Instability of the sheath-plasma resonance Stenzel, R. L. Physical Review Letters, Vol. 60, Issue 8 https://doi.org/10.1103/PhysRevLett.60.704	journal	February 1988
Spatial proximity effects on the excitation of Sheath RF Voltages by evanescent Slow Waves in the Ion Cyclotron Range of Frequencies Colas, Laurent; Lu, Ling-Feng; Křivská, Alena arXiv https://doi.org/10.48550/arxiv.1701.02920	text	January 2017
Radio-frequency wave interactions with a plasma sheath in oblique-angle magnetic fields using a sheath impedance model Kohno, H.; Myra, J. R. Zenodo https://doi.org/10.5281/zenodo.1405218	text	January 2018
Radio frequency wave interactions with a plasma sheath: the role of wave and plasma sheath impedances Myra, J. R.; Kohno, H. Zenodo https://doi.org/10.5281/zenodo.2284968	text	January 2018
A Post-Processing Method To Simulate The Generalized Rf Sheath Boundary Condition Myra, J. R.; Kohno, H. Zenodo https://doi.org/10.5281/zenodo.579548	text	January 2017

Figures / Tables (9)

Similar Records

A post-processing method to simulate the generalized RF sheath boundary condition

Journal Article · Sun Oct 22 20:00:00 EDT 2017 · EPJ Web of Conferences (Online) · OSTI ID:1406115

A tutorial on radio frequency sheath physics for magnetically confined fusion devices

Journal Article · Tue Sep 21 20:00:00 EDT 2021 · Journal of Plasma Physics · OSTI ID:1821706

Physics-based parametrization of the surface impedance for radio frequency sheaths

Journal Article · Thu Jul 06 20:00:00 EDT 2017 · Physics of Plasmas · OSTI ID:1368368

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ICRF
plasma
radio frequency
sheath
tokamak

Calculation of RF sheath properties from surface wave-fields: a post-processing method

Citation Formats

References (37)

Figures / Tables (9)

Similar Records

Related Subjects