Formation and Stability of Impurity “Snakes” in Tokamak Plasmas
New observations of the formation and dynamics of long-lived impurity-induced helical “snake” modes in tokamak plasmas have recently been carried out on Alcator C-Mod. The snakes form as an asymmetry in the impurity ion density that undergoes a seamless transition from a small helically displaced de...
| Main Authors: | , , , , , , , , , , , , , , , , , , , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
American Physical Society
2013
|
| Online Access: | http://hdl.handle.net/1721.1/78312 https://orcid.org/0000-0001-8319-5971 https://orcid.org/0000-0002-9604-204X https://orcid.org/0000-0002-4438-729X https://orcid.org/0000-0002-5283-0546 |
| _version_ | 1811095662833434624 |
|---|---|
| author | Delgado-Aparicio, Luis Sugiyama, Linda E. Granetz, Robert S. Gates, D. A. Rice, John E. Reinke, Matthew Logan Bitter, M. Fredrickson, E. Greenwald, Martin J. Hill, K. Hubbard, Amanda E. Hughes, Jerry W. Pablant, N. Scott, S. Wilson, R. Marmar, Earl S. Podpaly, Y. Wolfe, S. Wukitch, Stephen James Gao, Chi, Ph. D. Massachusetts Institute of Technology |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Delgado-Aparicio, Luis Sugiyama, Linda E. Granetz, Robert S. Gates, D. A. Rice, John E. Reinke, Matthew Logan Bitter, M. Fredrickson, E. Greenwald, Martin J. Hill, K. Hubbard, Amanda E. Hughes, Jerry W. Pablant, N. Scott, S. Wilson, R. Marmar, Earl S. Podpaly, Y. Wolfe, S. Wukitch, Stephen James Gao, Chi, Ph. D. Massachusetts Institute of Technology |
| author_sort | Delgado-Aparicio, Luis |
| collection | MIT |
| description | New observations of the formation and dynamics of long-lived impurity-induced helical “snake” modes in tokamak plasmas have recently been carried out on Alcator C-Mod. The snakes form as an asymmetry in the impurity ion density that undergoes a seamless transition from a small helically displaced density to a large crescent-shaped helical structure inside q<1, with a regularly sawtoothing core. The observations show that the conditions for the formation and persistence of a snake cannot be explained by plasma pressure alone. Instead, many features arise naturally from nonlinear interactions in a 3D MHD model that separately evolves the plasma density and temperature. |
| first_indexed | 2024-09-23T16:23:17Z |
| format | Article |
| id | mit-1721.1/78312 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T16:23:17Z |
| publishDate | 2013 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/783122023-02-26T10:16:56Z Formation and Stability of Impurity “Snakes” in Tokamak Plasmas Delgado-Aparicio, Luis Sugiyama, Linda E. Granetz, Robert S. Gates, D. A. Rice, John E. Reinke, Matthew Logan Bitter, M. Fredrickson, E. Greenwald, Martin J. Hill, K. Hubbard, Amanda E. Hughes, Jerry W. Pablant, N. Scott, S. Wilson, R. Marmar, Earl S. Podpaly, Y. Wolfe, S. Wukitch, Stephen James Gao, Chi, Ph. D. Massachusetts Institute of Technology Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Laboratory for Nuclear Science Massachusetts Institute of Technology. Plasma Science and Fusion Center Delgado-Aparicio, Luis Sugiyama, Linda E. Granetz, Robert S. Rice, John E. Reinke, Matthew Logan Gao, Chi Greenwald, Martin J. Hubbard, Amanda E. Hughes, Jerry W. Marmar, Earl S. Podpaly, Y. Wolfe, S. Wukitch, Stephen James New observations of the formation and dynamics of long-lived impurity-induced helical “snake” modes in tokamak plasmas have recently been carried out on Alcator C-Mod. The snakes form as an asymmetry in the impurity ion density that undergoes a seamless transition from a small helically displaced density to a large crescent-shaped helical structure inside q<1, with a regularly sawtoothing core. The observations show that the conditions for the formation and persistence of a snake cannot be explained by plasma pressure alone. Instead, many features arise naturally from nonlinear interactions in a 3D MHD model that separately evolves the plasma density and temperature. United States. Dept. of Energy (Contract DE-FC02-99ER54512) 2013-04-09T20:57:05Z 2013-04-09T20:57:05Z 2013-02 2012-07 Article http://purl.org/eprint/type/JournalArticle http://hdl.handle.net/1721.1/78312 Delgado-Aparicio, L. et al. “Formation and Stability of Impurity ‘Snakes’ in Tokamak Plasmas.” Physical Review Letters 110.6 (2013). © 2013 American Physical Society https://orcid.org/0000-0001-8319-5971 https://orcid.org/0000-0002-9604-204X https://orcid.org/0000-0002-4438-729X https://orcid.org/0000-0002-5283-0546 en_US http://dx.doi.org/10.1103/PhysRevLett.110.065006 Physical Review Letters Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society APS |
| spellingShingle | Delgado-Aparicio, Luis Sugiyama, Linda E. Granetz, Robert S. Gates, D. A. Rice, John E. Reinke, Matthew Logan Bitter, M. Fredrickson, E. Greenwald, Martin J. Hill, K. Hubbard, Amanda E. Hughes, Jerry W. Pablant, N. Scott, S. Wilson, R. Marmar, Earl S. Podpaly, Y. Wolfe, S. Wukitch, Stephen James Gao, Chi, Ph. D. Massachusetts Institute of Technology Formation and Stability of Impurity “Snakes” in Tokamak Plasmas |
| title | Formation and Stability of Impurity “Snakes” in Tokamak Plasmas |
| title_full | Formation and Stability of Impurity “Snakes” in Tokamak Plasmas |
| title_fullStr | Formation and Stability of Impurity “Snakes” in Tokamak Plasmas |
| title_full_unstemmed | Formation and Stability of Impurity “Snakes” in Tokamak Plasmas |
| title_short | Formation and Stability of Impurity “Snakes” in Tokamak Plasmas |
| title_sort | formation and stability of impurity snakes in tokamak plasmas |
| url | http://hdl.handle.net/1721.1/78312 https://orcid.org/0000-0001-8319-5971 https://orcid.org/0000-0002-9604-204X https://orcid.org/0000-0002-4438-729X https://orcid.org/0000-0002-5283-0546 |
| work_keys_str_mv | AT delgadoaparicioluis formationandstabilityofimpuritysnakesintokamakplasmas AT sugiyamalindae formationandstabilityofimpuritysnakesintokamakplasmas AT granetzroberts formationandstabilityofimpuritysnakesintokamakplasmas AT gatesda formationandstabilityofimpuritysnakesintokamakplasmas AT ricejohne formationandstabilityofimpuritysnakesintokamakplasmas AT reinkematthewlogan formationandstabilityofimpuritysnakesintokamakplasmas AT bitterm formationandstabilityofimpuritysnakesintokamakplasmas AT fredricksone formationandstabilityofimpuritysnakesintokamakplasmas AT greenwaldmartinj formationandstabilityofimpuritysnakesintokamakplasmas AT hillk formationandstabilityofimpuritysnakesintokamakplasmas AT hubbardamandae formationandstabilityofimpuritysnakesintokamakplasmas AT hughesjerryw formationandstabilityofimpuritysnakesintokamakplasmas AT pablantn formationandstabilityofimpuritysnakesintokamakplasmas AT scotts formationandstabilityofimpuritysnakesintokamakplasmas AT wilsonr formationandstabilityofimpuritysnakesintokamakplasmas AT marmarearls formationandstabilityofimpuritysnakesintokamakplasmas AT podpalyy formationandstabilityofimpuritysnakesintokamakplasmas AT wolfes formationandstabilityofimpuritysnakesintokamakplasmas AT wukitchstephenjames formationandstabilityofimpuritysnakesintokamakplasmas AT gaochiphdmassachusettsinstituteoftechnology formationandstabilityofimpuritysnakesintokamakplasmas |