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Runaway electron beam stability and decay in COMPASS
- Source :
- Nuclear fusion 59 (2019): 096036-1–096036-12. doi:10.1088/1741-4326/ab210f, info:cnr-pdr/source/autori:Ficker O.; MacUsova E.; Mlynar J.; Bren D.; Casolari A.; Cerovsky J.; Farnik M.; Grover O.; Havlicek J.; Havranek A.; Hron M.; Imrisek M.; Jerab M.; Krbec J.; Kulhanek P.; Linhart V.; Marcisovsky M.; Markovic T.; Naydenkova D.; Panek R.; Sos M.; Svihra P.; Svoboda V.; Tomes M.; Urban J.; Varju J.; Vlainic M.; Vondracek P.; Vrba V.; Weinzettl V.; Carnevale D.; Decker J.; Gobbin M.; Gospodarczyk M.; Papp G.; Peysson Y.; Plyusnin V.V.; Rabinski M.; Reux C./titolo:Runaway electron beam stability and decay in COMPASS/doi:10.1088%2F1741-4326%2Fab210f/rivista:Nuclear fusion/anno:2019/pagina_da:096036-1/pagina_a:096036-12/intervallo_pagine:096036-1–096036-12/volume:59, Nuclear Fusion
- Publication Year :
- 2019
- Publisher :
- International Atomic Energy Agency., Wien, 2019.
-
Abstract
- This paper presents two scenarios used for generation of a runaway electron (RE) beam in the COMPASS tokamak with a focus on the decay phase and control of the beam. The first scenario consists of massive gas injection of argon into the current ramp-up phase, leading to a disruption accompanied by runaway plateau generation. In the second scenario, injection of a smaller amount of gas is used in order to isolate the RE beam from high-temperature plasma. The performances of current control and radial and vertical position feedback control in the second scenario were experimentally studied and analysed. The role of RE energy in the radial position stability of the RE beam seems to be crucial. A comparison of the decay phase of the RE beam in various amounts of Ar or Ne was studied using absolute extreme ultraviolet (AXUV) tomography and hard x-ray (HXR) intensity measurement. Argon clearly leads to higher HXR fluxes for the same current decay rate than neon, while radiated power based on AXUV measurements is larger for Ne in the same set of discharges.
- Subjects :
- Nuclear and High Energy Physics
Settore ING-INF/04
Tokamak
chemistry.chemical_element
Electron
Effective radiated power
tomography
disruptions
7. Clean energy
01 natural sciences
010305 fluids & plasmas
law.invention
Neon
law
0103 physical sciences
010306 general physics
Physics
Argon
COMPASS tokamak
runaway electrons
Plasma
Condensed Matter Physics
Computational physics
chemistry
tokamaks
Beam (structure)
Subjects
Details
- Language :
- English
- ISSN :
- 00295515, 07413335, 17480221, and 00312460
- Database :
- OpenAIRE
- Journal :
- Nuclear fusion 59 (2019): 096036-1–096036-12. doi:10.1088/1741-4326/ab210f, info:cnr-pdr/source/autori:Ficker O.; MacUsova E.; Mlynar J.; Bren D.; Casolari A.; Cerovsky J.; Farnik M.; Grover O.; Havlicek J.; Havranek A.; Hron M.; Imrisek M.; Jerab M.; Krbec J.; Kulhanek P.; Linhart V.; Marcisovsky M.; Markovic T.; Naydenkova D.; Panek R.; Sos M.; Svihra P.; Svoboda V.; Tomes M.; Urban J.; Varju J.; Vlainic M.; Vondracek P.; Vrba V.; Weinzettl V.; Carnevale D.; Decker J.; Gobbin M.; Gospodarczyk M.; Papp G.; Peysson Y.; Plyusnin V.V.; Rabinski M.; Reux C./titolo:Runaway electron beam stability and decay in COMPASS/doi:10.1088%2F1741-4326%2Fab210f/rivista:Nuclear fusion/anno:2019/pagina_da:096036-1/pagina_a:096036-12/intervallo_pagine:096036-1–096036-12/volume:59, Nuclear Fusion
- Accession number :
- edsair.doi.dedup.....77c5d4c626b28dbc26428e40ef324c11