Studies of ICRF mode conversion with phase contrast imaging and full-wave simulations in Alcator C-Mod
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 2012.
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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/1721.1/79259 |
| _version_ | 1826202061364002816 |
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| author | Tsujii, Naoto |
| author2 | Miklos Porkolab. |
| author_facet | Miklos Porkolab. Tsujii, Naoto |
| author_sort | Tsujii, Naoto |
| collection | MIT |
| description | Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 2012. |
| first_indexed | 2024-09-23T12:01:33Z |
| format | Thesis |
| id | mit-1721.1/79259 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T12:01:33Z |
| publishDate | 2013 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/792592019-04-10T09:03:51Z Studies of ICRF mode conversion with phase contrast imaging and full-wave simulations in Alcator C-Mod Studies of ion cyclotron range of frequencies mode conversion with phase contrast imaging and full-wave simulations in Alcator C-Mod Tsujii, Naoto Miklos Porkolab. Massachusetts Institute of Technology. Department of Physics. Massachusetts Institute of Technology. Department of Physics. Physics. Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 2012. Cataloged from PDF version of thesis. Includes bibliographical references (p. 199-211). Radio frequency (rf) waves in the ion cyclotron range of frequencies (ICRF) are widely used for heating fusion plasmas. In a multi-ion-species plasma, the launched fast waves convert to ion cyclotron waves and ion Bernstein waves in the vicinity of the two-ion hybrid resonance between the cyclotron resonances. The mode converted waves are of interest as actuators to optimize plasma performance through current drive and flow drive. Numerical simulations are essential to describe these processes accurately in a realistic tokamak geometry, and it is important that these simulation codes be validated against experiment. The phase contrast imaging (PCI) technique has been used on Alcator C-Mod to measure directly the rf waves. The measurements were compared to predictions of full-wave simulations using a synthetic diagnostic method. The measured mode converted wave intensity was found to be a factor of ~50 weaker than what was expected from the linear wave theory in a strong mode conversion regime. The agreement improved when the wave intensity was weaker, which is a possible indication of nonlinear wave physics being involved. by Naoto Tsujii. Ph.D. 2013-06-17T19:51:14Z 2013-06-17T19:51:14Z 2012 2012 Thesis http://hdl.handle.net/1721.1/79259 846589927 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 211 p. application/pdf Massachusetts Institute of Technology |
| spellingShingle | Physics. Tsujii, Naoto Studies of ICRF mode conversion with phase contrast imaging and full-wave simulations in Alcator C-Mod |
| title | Studies of ICRF mode conversion with phase contrast imaging and full-wave simulations in Alcator C-Mod |
| title_full | Studies of ICRF mode conversion with phase contrast imaging and full-wave simulations in Alcator C-Mod |
| title_fullStr | Studies of ICRF mode conversion with phase contrast imaging and full-wave simulations in Alcator C-Mod |
| title_full_unstemmed | Studies of ICRF mode conversion with phase contrast imaging and full-wave simulations in Alcator C-Mod |
| title_short | Studies of ICRF mode conversion with phase contrast imaging and full-wave simulations in Alcator C-Mod |
| title_sort | studies of icrf mode conversion with phase contrast imaging and full wave simulations in alcator c mod |
| topic | Physics. |
| url | http://hdl.handle.net/1721.1/79259 |
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