Search: onr:"swepub:oai:DiVA.org:kth-177743" >
Hysteresis in the t...
Hysteresis in the tearing mode locking/unlocking due to resonant magnetic perturbations in EXTRAP T2R
-
- Fridström, Richard (author)
- KTH,Fusionsplasmafysik
-
- Frassinetti, Lorenzo (author)
- KTH,Fusionsplasmafysik
-
- Brunsell, Per R. (author)
- KTH,Fusionsplasmafysik
-
(creator_code:org_t)
- 2015-09-03
- 2015
- English.
-
In: Plasma Physics and Controlled Fusion. - : Institute of Physics Publishing (IOPP). - 0741-3335 .- 1361-6587. ; 57:10
- Related links:
-
https://urn.kb.se/re...
-
show more...
-
https://doi.org/10.1...
-
show less...
Abstract
Subject headings
Close
- The physical mechanisms behind the hysteresis in the tearing mode locking and unlocking to a resonant magnetic perturbation (RMP) are experimentally studied in EXTRAP T2R reversed-field pinch. The experiments show that the electromagnetic and the viscous torque increase with increasing perturbation amplitude until the mode locks to the wall. At the wall-locking, the plasma velocity reduction profile is peaked at the radius where the RMP is resonant. Thereafter, the viscous torque drops due to the relaxation of the velocity in the central plasma. This is the main reason for the hysteresis in the RMP locking and unlocking amplitude. The increased amplitude of the locked tearing mode produces further deepening of the hysteresis. Both experimental results are in qualitative agreement with the model in Fitzpatrick et al (2001 Phys. Plasmas 8 4489)
Subject headings
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
Keyword
- EXTRAP T2R
- hysteresis
- locking unlocking
- resonant magnetic perturbation
- reversed-field pinch
- tearing modes
- Magnetic resonance
- Magnetism
- Pinch effect
- Wave plasma interactions
- Resonant magnetic perturbations
- Reversed field pinch
- Locks (fasteners)
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
To the university's database