Runaway electron beam stability and decay in COMPASS

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F19%3A00509572" target="_blank" >RIV/61389021:_____/19:00509572 - isvavai.cz</a>

Alternative codes found

RIV/68407700:21340/19:00336982 RIV/00216208:11320/19:10396115

Result on the web

<a href="https://iopscience.iop.org/article/10.1088/1741-4326/ab210f" target="_blank" >https://iopscience.iop.org/article/10.1088/1741-4326/ab210f</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1741-4326/ab210f" target="_blank" >10.1088/1741-4326/ab210f</a>

Result language

angličtina

Original language name

Runaway electron beam stability and decay in COMPASS

Original language description

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 erature 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.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10305 - Fluids and plasma physics (including surface physics)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2019

Confidentiality

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

Name of the periodical

Nuclear Fusion

ISSN

0029-5515

e-ISSN

—

Volume of the periodical

59

Issue of the periodical within the volume

9

Country of publishing house

AT - AUSTRIA

Number of pages

12

Pages from-to

096036

UT code for WoS article

000478690900001

EID of the result in the Scopus database

2-s2.0-85072086994