INTERACTION OF NEUTRAL BEAM INJECTED FAST IONS WITH CYCLOTRON RESONANCE FREQUENCY WAVES

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OAK B202 INTERACTION OF NEUTRAL BEAM INJECTED FAST IONS WITH CYCLOTRON RESONANCE FREQUENCY WAVES. Existing tokamaks such as DIII-D and future experiments like ITER employ both NB injection (NBI) and ion-cyclotron resonance heating (ICRH) for auxiliary heating and current drive. The presence of energetic particles produced by NBI can result in absorption of the Ion cyclotron radio frequency (ICRF) power. ICRF can also interact with the energetic beam ions to alter the characteristics of NBI momentum deposition and resultant impact on current drive and plasma rotation. To study the synergism between NBI and ICRF, a simple physical model for the ... continued below

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11 pages

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CHOI,M; CHAN,VS; CHIU,SC; OMELCHENKO,YA; SENTOKU,Y & STJOH,HE May 1, 2003.

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OAK B202 INTERACTION OF NEUTRAL BEAM INJECTED FAST IONS WITH CYCLOTRON RESONANCE FREQUENCY WAVES. Existing tokamaks such as DIII-D and future experiments like ITER employ both NB injection (NBI) and ion-cyclotron resonance heating (ICRH) for auxiliary heating and current drive. The presence of energetic particles produced by NBI can result in absorption of the Ion cyclotron radio frequency (ICRF) power. ICRF can also interact with the energetic beam ions to alter the characteristics of NBI momentum deposition and resultant impact on current drive and plasma rotation. To study the synergism between NBI and ICRF, a simple physical model for the slowing-down of NB injected fast ions is implemented in a Monte-Carlo rf orbit code. This paper presents the first results. The velocity space distributions of energetic ions generated by ICRF and NBI are calculated and compared. The change in mechanical momentum of the beam and an estimate of its impact on the NB-driven current are presented and compared with ONETWO simulation results.

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11 pages

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INIS; OSTI as DE00814029

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  • THIS IS A PREPRINT OF A PAPER TO BE PRESENTED AT THE 15TH TOPICAL CONFERENCE ON RADIO FRQUENCY POWER IN PLASMAS, MORAN, WY (US), 05/01/2003--05/21/2003

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  • Report No.: NONE
  • Grant Number: FG03-95ER54309
  • Office of Scientific & Technical Information Report Number: 814029
  • Archival Resource Key: ark:/67531/metadc739843

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Office of Scientific & Technical Information Technical Reports

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  • May 1, 2003

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  • Oct. 18, 2015, 6:40 p.m.

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  • Jan. 3, 2017, 12:48 p.m.

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CHOI,M; CHAN,VS; CHIU,SC; OMELCHENKO,YA; SENTOKU,Y & STJOH,HE. INTERACTION OF NEUTRAL BEAM INJECTED FAST IONS WITH CYCLOTRON RESONANCE FREQUENCY WAVES, article, May 1, 2003; United States. (digital.library.unt.edu/ark:/67531/metadc739843/: accessed May 25, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.