Fast particles-wave interaction in the Alfven frequency range on the Joint European Torus tokamak
Creators
- 1. Physics Department and PSFC, MIT, 175 Albany Street, Cambridge, Massachusetts 02139 (United States)
- 2. Association EURATOM/IST, Av. Rovisto Paris, 1096 Lisbon, (Portugal)
- 3. JET Joint Undertaking, Abingdon, OX14 3EA, (United Kingdom)
- 4. Institute for Fusion Studies, University of Texas at Austin, Austin, Texas 78712 (United States)
- 5. Princeton Plasma Physics Laboratory, P.O. Box 451, Princeton, New Jersey 08543 (United States)
- 6. Alfven Laboratory, Royal Institute of Technology, SE-100 44, Stockholm, (Sweden)
Description
Wave-particle interaction phenomena in the Alfven Eigenmode (AE) frequency range are investigated at the Joint European Torus [P. H. Rebut and B. E. Keen, Fusion Technol. 11, 13 (1987)] using active and passive diagnostic methods. Fast particles are generated by neutral beam injection, ion cyclotron resonance heating, and fusion reactions. External antennas are used to excite stable AEs and measure fast particle drive and damping separately. Comparisons with numerical calculations lead to an identification of the different damping mechanisms. The use of the active AE diagnostic system to generate control signals based on the proximity to marginal stability limits for AE and low-frequency magnetohydrodynamic (MHD) modes is explored. Signatures of the different nonlinear regimes of fast particle driven AE instabilities predicted by theory are found in the measured spectra. The diagnostic use of AE measurements to get information both on the plasma bulk and the fast particle distribution is assessed. (c) 2000 American Institute of Physics
Additional details
Publishing Information
- Journal Title
- Physics of Plasmas
- Journal Volume
- 7
- Journal Issue
- 5
- Journal Page Range
- p. 1816-1824
- ISSN
- 1070-664X
- CODEN
- PHPAEN
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 32059750
- Subject category
- S70: PLASMA PHYSICS AND FUSION TECHNOLOGY;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- ALFVEN WAVES; ICR HEATING; ION CYCLOTRON-RESONANCE; JET TOKAMAK; MAGNETOHYDRODYNAMICS; PLASMA DIAGNOSTICS; PLASMA INSTABILITY; THEORETICAL DATA
- Descriptors DEC
- CLOSED PLASMA DEVICES; CYCLOTRON RESONANCE; DATA; FLUID MECHANICS; HEATING; HIGH-FREQUENCY HEATING; HYDRODYNAMICS; HYDROMAGNETIC WAVES; INFORMATION; INSTABILITY; MECHANICS; NUMERICAL DATA; PLASMA HEATING; RESONANCE; THERMONUCLEAR DEVICES; TOKAMAK DEVICES
- Proposed descriptors and Free-text terms
- plasma toroidal confinement; plasma-beam interactions; plasma radiofrequency heating; plasma magnetohydrodynamics; plasma beam injection heating