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Initial results fro...
Initial results from the rebuilt EXTRAP T2R RFP device
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- Brunsell, Per (author)
- KTH,Alfvénlaboratoriet,Fusion Plasma Physics
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- Bergsåker, Henric (author)
- KTH,Alfvénlaboratoriet,Fusion Plasma Physics
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- Cecconello, Marco (author)
- KTH,Alfvénlaboratoriet,Fusion Plasma Physics
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- Drake, James Robert (author)
- KTH,Alfvénlaboratoriet,Fusion Plasma Physics
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- Gravestijn, Robert (author)
- KTH,Fysik,Atomic and Molecular Physics
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- Hedqvist, Anders (author)
- KTH,Fysik,Atomic and Molecular Physics
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- Malmberg, Jenny A. (author)
- KTH,Alfvénlaboratoriet
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(creator_code:org_t)
- 2001-10-10
- 2001
- English.
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In: Plasma Physics and Controlled Fusion. - BRISTOL. ENGLAND : IOP PUBLISHING LTD. - 0741-3335 .- 1361-6587. ; 43:11, s. 1457-1470
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- The EXTRAP T2R thin shell reversed-field pinch (RFP) device has recently resumed operation after a major rebuild including the replacement of the graphite armour with molybdenum limiters, a fourfold increase of the shell time constant, and the replacement of the helical coil used for the toroidal field with a conventional solenoid-type coil. Wall-conditioning using hydrogen glow discharge cleaning was instrumental for successful RFP operation. Carbon was permanently removed from the walls during the first week of operation. The initial results from RFP operation with relatively low plasma currents in the range I-p = 70-100 kA are reported. RFP discharges are sustained for more than three shell times. Significant improvements in plasma parameters are observed, compared to operation before the rebuild. There is a substantial reduction in the carbon impurity level. The electron density behaviour is more shot-to-shot reproducible. The typical density is n(e) = 0.5-1 x 10(19) m(-3). Monitors of H-alpha line radiation indicate that the plasma wall interaction is more toroidally symmetric and that there is less transient gas release from the wall. The minimum loop voltage is in the range V-t = 28-35 V, corresponding to a reduction by a factor of two to three compared to the value before the rebuild.
Subject headings
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Keyword
- REVERSED-FIELD PINCH
- RESISTIVE-SHELL
- TOROIDAL PINCH
- FLUCTUATIONS
- WALL
- Atomic and molecular physics
- Atom- och molekylfysik
Publication and Content Type
- ref (subject category)
- art (subject category)
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