Stochastization as a possible cause for fast reconnection during MHD mode activity in the ASDEX Upgrade tokamak
Creators
- 1. MPI fuer Plasmaphysik, Euratom-Association, D-85748 Garching (Germany)
- 2. Helsinki University of Technology, Association Euratom-Tekes, PO Box 2200, FIN-02015 HUT (Finland)
- 3. Department of Applied Mathematics, University of Craiova, A.I.Cuza Street 13, Craiova 1100 (200585) (Romania)
- 4. Institute of Solid State Physics, Association Euratom-University of Latvia, Kengaraga Street 8, LV-1063, Riga, Latvia (Latvia)
Description
The role of stochastization of magnetic field lines is analysed in fast reconnection phenomena occurring in magnetized fusion plasma during various conditions in the ASDEX Upgrade tokamak. The mapping technique is applied to trace the field lines of toroidally confined plasma where perturbation parameters are expressed in terms of experimental perturbation amplitudes determined from the ASDEX Upgrade tokamak. It is found that fast reconnection observed during amplitude drops of the neoclassical tearing mode instability in the frequently interrupted regime can be related to stochastization. It is also shown that stochastization can explain the fast loss of confinement during the minor disruption. This demonstrates that stochastization can be regarded as a possible cause for different MHD events in the ASDEX Upgrade
Availability note (English)
Available online at http://stacks.iop.org/0029-5515/46/741/nf6_7_006.pdf or at the Web site for the journal Nuclear Fusion (ISSN 1741-4326 ) http://www.iop.org/Additional details
Identifiers
- URL
- http://stacks.iop.org/0029-5515/46/741/nf6_7_006.pdf; http://www.iop.org/;
- DOI
- 10.1088/0029-5515/46/7/006;
- PII
- S0029-5515(06)17573-0;
Publishing Information
- Journal Title
- Nuclear Fusion
- Journal Volume
- 46
- Journal Issue
- 7
- Journal Page Range
- p. 741-751
- ISSN
- 0029-5515
- CODEN
- NUFUAU
INIS
- Country of Publication
- International Atomic Energy Agency (IAEA)
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 37121395
- Subject category
- S70: PLASMA PHYSICS AND FUSION TECHNOLOGY;
- Descriptors DEI
- AMPLITUDES; ASDEX TOKAMAK; DISTURBANCES; MAGNETIC FIELDS; MAGNETOHYDRODYNAMICS; NEOCLASSICAL TRANSPORT THEORY; PLASMA; PLASMA CONFINEMENT; TEARING INSTABILITY
- Descriptors DEC
- CHARGED-PARTICLE TRANSPORT THEORY; CLOSED PLASMA DEVICES; CONFINEMENT; FLUID MECHANICS; HYDRODYNAMICS; INSTABILITY; MECHANICS; PLASMA INSTABILITY; PLASMA MACROINSTABILITIES; THERMONUCLEAR DEVICES; TOKAMAK DEVICES; TRANSPORT THEORY
Optional Information
- Collaborations
- ASDEX Upgrade Team