Experimental and numerical characterization of ion-cyclotron heated protons on the Alcator C-Mod tokamak
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Nuclear Science and Engineering, 2006.
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2008
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| Online Access: | http://hdl.handle.net/1721.1/41277 |
| _version_ | 1826212095050383360 |
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| author | Tang, Vincent, 1978- |
| author2 | Ronald R. Parker. |
| author_facet | Ronald R. Parker. Tang, Vincent, 1978- |
| author_sort | Tang, Vincent, 1978- |
| collection | MIT |
| description | Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Nuclear Science and Engineering, 2006. |
| first_indexed | 2024-09-23T15:16:18Z |
| format | Thesis |
| id | mit-1721.1/41277 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T15:16:18Z |
| publishDate | 2008 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/412772019-04-12T20:23:07Z Experimental and numerical characterization of ion-cyclotron heated protons on the Alcator C-Mod tokamak Tang, Vincent, 1978- Ronald R. Parker. Massachusetts Institute of Technology. Dept. of Nuclear Science and Engineering. Massachusetts Institute of Technology. Dept. of Nuclear Science and Engineering. Nuclear Science and Engineering. Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Nuclear Science and Engineering, 2006. Includes bibliographical references (p. 183-187). Energetic minority protons with -100 keV effective temperature are routinely created in Alcator C-Mod plasmas with the application of ICRF. A new multi-channel Compact Neutral Particle Analyzer is used to make measurements of these distributions in Alcator C-Mod's unique and reactor-relevant operating space via an active charge-exchange technique (CX). Using a detailed model that accounts for beam, halo, and impurity CX, core proton temperatures of 430-120 keV are directly measured for the first time in lower density (neo0 0.8 - 1.5 x 1020/m3) Alcator C-Mod plasmas using only 0.5 MW of ICRF power. The model found that the minority proton temperatures are peaked spatially away from r/a=O, even for an on-axis resonance. Additionally, noticeable phase-space anisotropy is seen as expected for ICRF heating. The measured effective temperatures scale approximately with the Stix parameter. The CNPA measurements are also compared with several leading simulation packages. Preliminary comparisons with results from the AORSA/CQL3D Full-wave/Fokker-Planck (FW/FP) code using a new synthetic diagnostic show good agreement and demonstrate that these complex codes are required to simulate Alcator C-Mod's energetic minority populations with accuracy. These FW/FP analyses represent the first comparison between predictions of such detailed codes and extensive minority ion experimental measurements. by Vincent Tang. Ph.D. 2008-04-23T14:39:09Z 2008-04-23T14:39:09Z 2006 2006 Thesis http://hdl.handle.net/1721.1/41277 213479862 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 187 p. application/pdf Massachusetts Institute of Technology |
| spellingShingle | Nuclear Science and Engineering. Tang, Vincent, 1978- Experimental and numerical characterization of ion-cyclotron heated protons on the Alcator C-Mod tokamak |
| title | Experimental and numerical characterization of ion-cyclotron heated protons on the Alcator C-Mod tokamak |
| title_full | Experimental and numerical characterization of ion-cyclotron heated protons on the Alcator C-Mod tokamak |
| title_fullStr | Experimental and numerical characterization of ion-cyclotron heated protons on the Alcator C-Mod tokamak |
| title_full_unstemmed | Experimental and numerical characterization of ion-cyclotron heated protons on the Alcator C-Mod tokamak |
| title_short | Experimental and numerical characterization of ion-cyclotron heated protons on the Alcator C-Mod tokamak |
| title_sort | experimental and numerical characterization of ion cyclotron heated protons on the alcator c mod tokamak |
| topic | Nuclear Science and Engineering. |
| url | http://hdl.handle.net/1721.1/41277 |
| work_keys_str_mv | AT tangvincent1978 experimentalandnumericalcharacterizationofioncyclotronheatedprotonsonthealcatorcmodtokamak |