Calculation of RF sheath properties from surface wave-fields: a post-processing method
Abstract
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.
- Authors:
-
[1];
[2]
- Lodestar Research Corporation, Boulder, CO (United States)
- Kyushu Inst. of Technology, Iizuka, Fukuoka (Japan)
- Publication Date:
- Research Org.:
- Lodestar Research Corp., Boulder, CO (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC); Univ. of California, Oakland, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES); Japan Society for the Promotion of Science (JSPS); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division
- OSTI Identifier:
- 1593817
- Report Number(s):
- ORNL-4000158507-3; DOE-ER-54392-94; LRC-19-180
Journal ID: ISSN 0741-3335; LRC-19-180; TRN: US2102024
- Grant/Contract Number:
- AC05-00OR22725; JP16K18336; AC02- 05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Plasma Physics and Controlled Fusion
- Additional Journal Information:
- Journal Volume: 61; Journal Issue: 9; Related Information: http://doi.org/10.5281/zenodo.3255075; Journal ID: ISSN 0741-3335
- Publisher:
- IOP Science
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; plasma; radio frequency; ICRF; sheath; tokamak
Citation Formats
Myra, J. R., and Kohno, H. Calculation of RF sheath properties from surface wave-fields: a post-processing method. United States: N. p., 2019.
Web. doi:10.1088/1361-6587/ab2f41.
Myra, J. R., & Kohno, H. Calculation of RF sheath properties from surface wave-fields: a post-processing method. United States. doi:https://doi.org/10.1088/1361-6587/ab2f41
Myra, J. R., and Kohno, H. Tue .
"Calculation of RF sheath properties from surface wave-fields: a post-processing method". United States. doi:https://doi.org/10.1088/1361-6587/ab2f41. https://www.osti.gov/servlets/purl/1593817.
@article{osti_1593817,
title = {Calculation of RF sheath properties from surface wave-fields: a post-processing method},
author = {Myra, J. R. and Kohno, H.},
abstractNote = {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.},
doi = {10.1088/1361-6587/ab2f41},
journal = {Plasma Physics and Controlled Fusion},
number = 9,
volume = 61,
place = {United States},
year = {2019},
month = {7}
}
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