First detachment studies on COMPASS tokamak using nitrogen seeding.

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

First detachment studies on COMPASS tokamak using nitrogen seeding.

Popis výsledku v původním jazyce

Partial detachment is considered to be a mandatory regime for ITER and next-step devices, as it allows to dissipate a substantial part of the heat flux carried by the plasma particles and significantly reduce the heat fluxes deposited on the divertor target tiles. Despite that, most studies of power deposition in contemporary tokamaks were performed in attached plasmas[1].nDetached regimes tend to be more difficult to access and diagnose - for example the infrared thermography (the principal diagnostics for such studies) suffers from interference caused by increased bremsstrahlung in the infrared spectrum in detached plasmas. COMPASS has a combination of a relatively short connection length to the target and an open divertor geometry, which was considered unfavourable for detachment access. In order to facilitate access to partially detached regime of operation, impurity seeding in the divertor region can be employed. In this paper, we report on first results from the impurity seedingnexperiments, which were performed in Ohmic plasmas.

Název v anglickém jazyce

First detachment studies on COMPASS tokamak using nitrogen seeding.

Popis výsledku anglicky

Partial detachment is considered to be a mandatory regime for ITER and next-step devices, as it allows to dissipate a substantial part of the heat flux carried by the plasma particles and significantly reduce the heat fluxes deposited on the divertor target tiles. Despite that, most studies of power deposition in contemporary tokamaks were performed in attached plasmas[1].nDetached regimes tend to be more difficult to access and diagnose - for example the infrared thermography (the principal diagnostics for such studies) suffers from interference caused by increased bremsstrahlung in the infrared spectrum in detached plasmas. COMPASS has a combination of a relatively short connection length to the target and an open divertor geometry, which was considered unfavourable for detachment access. In order to facilitate access to partially detached regime of operation, impurity seeding in the divertor region can be employed. In this paper, we report on first results from the impurity seedingnexperiments, which were performed in Ohmic plasmas.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název statě ve sborníku

EPS 2017: 44th European Physical Society Conference on Plasma Physics

ISBN

979-10-96389-07

ISSN

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e-ISSN

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Počet stran výsledku

4

Strana od-do

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Název nakladatele

European Physical Society

Místo vydání

Mulhouse

Místo konání akce

Belfast

Datum konání akce

26. 6. 2017

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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