Analysis of MGI disruptions and runaway electron beams at COMPASS using tomography and fast camera data

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F18%3A00326937" target="_blank" >RIV/68407700:21340/18:00326937 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Analysis of MGI disruptions and runaway electron beams at COMPASS using tomography and fast camera data

Original language description

The tomographic inversion of signals from SXR and AXUV detector arrays is a valuable tool in various operational scenarios on COMPASS. However, runaway electron (RE) beam generation and mitigation experiments conducted at COMPASS [1] present a challenge to this method as this scenario creates a very noisy environment and conditions far from the optimal design parameters of the detectors. The massive gas injection, subsequent disruption and RE beam generation and decay phases are a source of quickly changing intensities of radiation in a broad range of wavelengths (bremsstrahlung and line radiation of the gas atoms and ions). In particular, the semiconductor-based detectors are also strongly affected by the HXR radiation produced due to the interaction of relativistic electrons with the wall. On the other hand, the tomographic inversion in this scenario might be a valuable source of information about the gas penetration speed, beam position, total radiated power and profile of the beam-gas interaction which might be related to the beam current profile or electron energy. Values of some of these quantities, in particular the ones related to the gas transport, can be also derived from high-speed camera images that are usually only weakly affected by the HXR radiation. This contribution summarizes the difficulties of using tomography in this scenario and the different effect of various mitigation gases (Ar, Ne, D) on the radiation signals, including the high-speed camera data.

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

2018

Confidentiality

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

Article name in the collection

Europhysics Conference Abstracts Vol. 42A

ISBN

9781510868441

ISSN

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e-ISSN

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Number of pages

4

Pages from-to

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Publisher name

European Physical Society

Place of publication

Mulhouse

Event location

Praha

Event date

Jul 2, 2018

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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