Studies of electron temperature fluctuations in the core of Alcator C-Mod plasmas via correlation electron cyclotron emission
Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Nuclear Science and Engineering, 2013.
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2013
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| Online Access: | http://hdl.handle.net/1721.1/82446 |
| _version_ | 1826205713639145472 |
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| author | Oi, Curran Y. M |
| author2 | Anne E. White. |
| author_facet | Anne E. White. Oi, Curran Y. M |
| author_sort | Oi, Curran Y. M |
| collection | MIT |
| description | Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Nuclear Science and Engineering, 2013. |
| first_indexed | 2024-09-23T13:17:26Z |
| format | Thesis |
| id | mit-1721.1/82446 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T13:17:26Z |
| publishDate | 2013 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/824462019-04-10T09:03:37Z Studies of electron temperature fluctuations in the core of Alcator C-Mod plasmas via correlation electron cyclotron emission Oi, Curran Y. M Anne E. White. Massachusetts Institute of Technology. Department of Nuclear Science and Engineering. Massachusetts Institute of Technology. Department of Nuclear Science and Engineering. Nuclear Science and Engineering. Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Nuclear Science and Engineering, 2013. Cataloged from PDF version of thesis. Includes bibliographical references (pages 55-56). Transport in tokamak plasmas is higher than predicted by neoclassical theory; this anomalous transport is believed to be attributed to turbulent fluctuations. New Correlation Electron Cyclotron Emission (CECE) experiments on Alcator C-Mod show lower levels of electron temperature fluctuations in the saturated ohmic confinement (SOC) regime than in the linear ohmic confinement (LOC) regime, however the lineaveraged density fluctuation data collected from ohmic plasmas previously showed the opposite trends. The apparent contradiction is explained by a change in the dominant turbulence modes in each confinement regime. Linear stability analysis shows that the LOC regime is dominated by trapped electron mode (TEM) turbulence and the SOC regime is on the border between the ion temperature gradient (ITG) and TEM turbulence modes being dominant. It is reasonable to believe that the TEM turbulence mode drives electron temperature fluctuations, which explains the higher electron temperature fluctuation levels seen in the LOC regime compared to the SOC regime. by Curran Y. M. Oi. S.B. 2013-11-18T19:24:13Z 2013-11-18T19:24:13Z 2013 Thesis http://hdl.handle.net/1721.1/82446 862980176 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 56 pages application/pdf Massachusetts Institute of Technology |
| spellingShingle | Nuclear Science and Engineering. Oi, Curran Y. M Studies of electron temperature fluctuations in the core of Alcator C-Mod plasmas via correlation electron cyclotron emission |
| title | Studies of electron temperature fluctuations in the core of Alcator C-Mod plasmas via correlation electron cyclotron emission |
| title_full | Studies of electron temperature fluctuations in the core of Alcator C-Mod plasmas via correlation electron cyclotron emission |
| title_fullStr | Studies of electron temperature fluctuations in the core of Alcator C-Mod plasmas via correlation electron cyclotron emission |
| title_full_unstemmed | Studies of electron temperature fluctuations in the core of Alcator C-Mod plasmas via correlation electron cyclotron emission |
| title_short | Studies of electron temperature fluctuations in the core of Alcator C-Mod plasmas via correlation electron cyclotron emission |
| title_sort | studies of electron temperature fluctuations in the core of alcator c mod plasmas via correlation electron cyclotron emission |
| topic | Nuclear Science and Engineering. |
| url | http://hdl.handle.net/1721.1/82446 |
| work_keys_str_mv | AT oicurranym studiesofelectrontemperaturefluctuationsinthecoreofalcatorcmodplasmasviacorrelationelectroncyclotronemission |