Statistical Analysis of Disruptions in COMPASS
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F18%3A10389727" target="_blank" >RIV/00216208:11320/18:10389727 - isvavai.cz</a>
Result on the web
<a href="https://www.mff.cuni.cz/veda/konference/wds/proc/pdf18/WDS18_16_f2_Matveeva.pdf" target="_blank" >https://www.mff.cuni.cz/veda/konference/wds/proc/pdf18/WDS18_16_f2_Matveeva.pdf</a>
DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Statistical Analysis of Disruptions in COMPASS
Original language description
Understanding of disruptions plays an important role for design of future fusion devices as they induce large thermal and mechanical loads on vacuum vessel [Wesson, 1987; Ikeda et al., 2007]. Statistical analysis of set of discharges during the period August-December 2017 was performed in order to improve our knowledge of disruptions on the COMPASS tokamak. About 58% of COMPASS plasma discharges are disruptive which provides a good opportunity for disruption studies. Hugill diagrams for COMPASS operational space and disruption rate are presented. Tendency to disrupt increases when safety factor q95 and plasma density density n-e approach current and Greenwald limits. COMPASS is equipped with magnetic diagnostics, which allow measurements of the plasma current at five toroidal locations. Therefore plasma current asymmetry can be studied. Asymmetrical disruptions parameters such as magnitude, frequency, number of rotations and duration of asymmetry are analyzed within the contribution. Plasma current asymmetries at COMPASS exhibit similar behavior as at JET. Ambiguity of plasma current measurements due to magnetic diagnostics position with respect to in-vessel components is discussed. Study of asymmetry magnitude dependence on disruption direction does not prove the assumption that the asymmetry might be caused by the short-circuit between the limiter tiles.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
10305 - Fluids and plasma physics (including surface physics)
Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
WDS'18 Proceedings of Contributed Papers — Physics
ISBN
978-80-7378-374-7
ISSN
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e-ISSN
neuvedeno
Number of pages
7
Pages from-to
105-111
Publisher name
Matfyzpress
Place of publication
Praha
Event location
Prague, Czech Republic
Event date
Jun 5, 2018
Type of event by nationality
EUR - Evropská akce
UT code for WoS article
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