Experimental measurements of ICRF minority-heated fast-ion distributions on Alcator C-Mod
Ion cyclotron resonance heating is the primary auxiliary heating on the Alcator C-Mod tokamak and is commonly used on other devices, and is planned for use on ITER. The RF-power density on C-Mod is above 5 MW m−3 providing for a unique opportunity to study wave–particle effects in the high RF power...
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| Format: | Article |
| Language: | en_US |
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IOP Publishing
2014
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| Online Access: | http://hdl.handle.net/1721.1/84062 https://orcid.org/0000-0003-4432-5504 https://orcid.org/0000-0001-8223-035X https://orcid.org/0000-0002-1620-9680 |
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| author | Sears, J. Bader, Andrew Granetz, Robert S. Bonoli, Paul T. Wukitch, Stephen James Parker, R. Hutchinson, Ian Horner |
| author2 | Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science |
| author_facet | Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science Sears, J. Bader, Andrew Granetz, Robert S. Bonoli, Paul T. Wukitch, Stephen James Parker, R. Hutchinson, Ian Horner |
| author_sort | Sears, J. |
| collection | MIT |
| description | Ion cyclotron resonance heating is the primary auxiliary heating on the Alcator C-Mod tokamak and is commonly used on other devices, and is planned for use on ITER. The RF-power density on C-Mod is above 5 MW m−3 providing for a unique opportunity to study wave–particle effects in the high RF power per particle regime. Minority heating produces a highly energetic tail in the minority distribution function which is measured using a compact neutral particle analyser. In this paper, we present the measurements of the fast-ion spectrum between 200 and 2 MeV, compiled over an entire experimental campaign. We also estimate the effective tail temperatures for the fast-ion distribution. We find that the fast-ion distribution is less energetic and less dense with increasing electron density; is more energetic with increasing plasma current; and is more dense but has no measurable change in energy with increasing RF power. Some possible explanations for these findings are discussed. |
| first_indexed | 2024-09-23T10:06:55Z |
| format | Article |
| id | mit-1721.1/84062 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T10:06:55Z |
| publishDate | 2014 |
| publisher | IOP Publishing |
| record_format | dspace |
| spelling | mit-1721.1/840622022-09-26T15:47:57Z Experimental measurements of ICRF minority-heated fast-ion distributions on Alcator C-Mod Experimental measurements of ion cyclotron range of frequency minority-heated fast-ion distributions on Alcator C-Mod Sears, J. Bader, Andrew Granetz, Robert S. Bonoli, Paul T. Wukitch, Stephen James Parker, R. Hutchinson, Ian Horner Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology. Department of Nuclear Science and Engineering Massachusetts Institute of Technology. Plasma Science and Fusion Center Koch Institute for Integrative Cancer Research at MIT Hutchinson, Ian Bader, Andrew Granetz, Robert S. Parker, Ronald R. Bonoli, Paul T. Hutchinson, Ian H. Wukitch, Stephen James Ion cyclotron resonance heating is the primary auxiliary heating on the Alcator C-Mod tokamak and is commonly used on other devices, and is planned for use on ITER. The RF-power density on C-Mod is above 5 MW m−3 providing for a unique opportunity to study wave–particle effects in the high RF power per particle regime. Minority heating produces a highly energetic tail in the minority distribution function which is measured using a compact neutral particle analyser. In this paper, we present the measurements of the fast-ion spectrum between 200 and 2 MeV, compiled over an entire experimental campaign. We also estimate the effective tail temperatures for the fast-ion distribution. We find that the fast-ion distribution is less energetic and less dense with increasing electron density; is more energetic with increasing plasma current; and is more dense but has no measurable change in energy with increasing RF power. Some possible explanations for these findings are discussed. United States. Dept. of Energy (Award DE-FC02-99ER54512) 2014-01-17T16:26:14Z 2014-01-17T16:26:14Z 2012-09 2012-05 Article http://purl.org/eprint/type/JournalArticle 0029-5515 1741-4326 http://hdl.handle.net/1721.1/84062 Bader, A., R.S. Granetz, R.R. Parker, P.T. Bonoli, I.H. Hutchinson, J. Sears, and S.J. Wukitch. “Experimental measurements of ion cyclotron range of frequency minority-heated fast-ion distributions on Alcator C-Mod.” Nuclear Fusion 52, no. 9 (September 1, 2012): 094019. https://orcid.org/0000-0003-4432-5504 https://orcid.org/0000-0001-8223-035X https://orcid.org/0000-0002-1620-9680 en_US http://dx.doi.org/10.1088/0029-5515/52/9/094019 Nuclear Fusion Creative Commons Attribution-Noncommercial-Share Alike 3.0 http://creativecommons.org/licenses/by-nc-sa/3.0/ application/pdf IOP Publishing Prof. Hutchinson via Chris Sherratt |
| spellingShingle | Sears, J. Bader, Andrew Granetz, Robert S. Bonoli, Paul T. Wukitch, Stephen James Parker, R. Hutchinson, Ian Horner Experimental measurements of ICRF minority-heated fast-ion distributions on Alcator C-Mod |
| title | Experimental measurements of ICRF minority-heated fast-ion distributions on Alcator C-Mod |
| title_full | Experimental measurements of ICRF minority-heated fast-ion distributions on Alcator C-Mod |
| title_fullStr | Experimental measurements of ICRF minority-heated fast-ion distributions on Alcator C-Mod |
| title_full_unstemmed | Experimental measurements of ICRF minority-heated fast-ion distributions on Alcator C-Mod |
| title_short | Experimental measurements of ICRF minority-heated fast-ion distributions on Alcator C-Mod |
| title_sort | experimental measurements of icrf minority heated fast ion distributions on alcator c mod |
| url | http://hdl.handle.net/1721.1/84062 https://orcid.org/0000-0003-4432-5504 https://orcid.org/0000-0001-8223-035X https://orcid.org/0000-0002-1620-9680 |
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