Disruptions and Plasma Current Asymmetries in Tokamak Plasmas

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F17%3A10372290" target="_blank" >RIV/00216208:11320/17:10372290 - isvavai.cz</a>

Result on the web

<a href="https://www.mff.cuni.cz/veda/konference/wds/proc/pdf17/WDS17_16_f2_Matveeva.pdf" target="_blank" >https://www.mff.cuni.cz/veda/konference/wds/proc/pdf17/WDS17_16_f2_Matveeva.pdf</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Disruptions and Plasma Current Asymmetries in Tokamak Plasmas

Original language description

A disruption is a dramatic event during which the tokamak plasma magnetic confinement degrades, plasma moves towards the wall and loses its thermal energy and current on an extremely short time scale. Understanding of the underlying physical processes behind disruptions is among important issues in the tokamak plasmas research because disruptions cause various mechanical and thermal loads in the vacuum vessel. The article presents an introduction to disruption causes, processes and consequences. Special attention is given to toroidally asymmetrical disruptions because they induce large sideway forces and the rotation of asymmetry might lead to a resonance with the natural frequency of the vacuum vessel (this is of particular concern for ITER). Further, the investigation of plasma current toroidal asymmetries during disruptions might complement the theory of Hiro currents flowing in the vacuum vessel. Possibilities of disruptions studies using magnetic diagnostics on COMPASS are discussed. The standard settings of Mirnov coils data acquisition system cannot cope with the wide range of values of raw unintegrated signals during the discharge flat-top and disruption which results into the corruption of numerically integrated signal. This considerably affects the calculated plasma current asymmetry. A method of combination of two acquisition channels with different settings is proposed to resolve this problem.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

10305 - Fluids and plasma physics (including surface physics)

Project

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Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

WDS&apos;17 Proceedings of Contributed Papers — Physics

ISBN

978-80-7378-356-3

ISSN

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e-ISSN

neuvedeno

Number of pages

8

Pages from-to

104-111

Publisher name

Matfyzpress

Place of publication

Praha

Event location

Prague, Czech Republic

Event date

Jun 6, 2017

Type of event by nationality

EUR - Evropská akce

UT code for WoS article

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