Development of a Cherenkov-type diagnostic system to study runaway electrons within the COMPASS tokamak

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F17%3A00481460" target="_blank" >RIV/61389021:_____/17:00481460 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21340/17:00316567

Výsledek na webu

<a href="http://dx.doi.org/10.1088/1748-0221/12/10/C10014" target="_blank" >http://dx.doi.org/10.1088/1748-0221/12/10/C10014</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1748-0221/12/10/C10014" target="_blank" >10.1088/1748-0221/12/10/C10014</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Development of a Cherenkov-type diagnostic system to study runaway electrons within the COMPASS tokamak

Popis výsledku v původním jazyce

Direct measurements of fast electrons, which are produced in high-temperature plasma and escape from tokamak-type facilities, are of particular interest for ITER and future fusion devices, where intense runaway electrons (RE) can significantly damage the firstwall components. Therefore, the runaway control and mitigation based on credible measuring methods should be developednalready in present devices. A team from the National Centre for Nuclear Research (NCBJ), Poland, developed special probes equipped with Cherenkov-type detectors for measurements of the fast electrons within edge plasmas of tokamaks. Studies of the fast runaway electrons were extensively carried out at the COMPASS tokamak at the Institute of Plasma Physics (IPP) in Prague during experimental campaigns in 2014–2016. In order to investigate an electron-beam energy distribution a three-channel probe equipped with the Cherenkov-type detectors sensitive to electrons of different energies has been constructed. The measurements performed by means of these detectors showed that the first fast electron peak appears usually in the current ramp-up phase, even before the hard Xrays (HXR) pulse. Some electron signals can also be observed during subsequent HXR emissions.nHowever, the most distinct electron peaks in all energy channels appear mainly during the plasma disruption. A correlation of Cherenkov signals with the MHD activity was also studied.

Název v anglickém jazyce

Development of a Cherenkov-type diagnostic system to study runaway electrons within the COMPASS tokamak

Popis výsledku anglicky

Direct measurements of fast electrons, which are produced in high-temperature plasma and escape from tokamak-type facilities, are of particular interest for ITER and future fusion devices, where intense runaway electrons (RE) can significantly damage the firstwall components. Therefore, the runaway control and mitigation based on credible measuring methods should be developednalready in present devices. A team from the National Centre for Nuclear Research (NCBJ), Poland, developed special probes equipped with Cherenkov-type detectors for measurements of the fast electrons within edge plasmas of tokamaks. Studies of the fast runaway electrons were extensively carried out at the COMPASS tokamak at the Institute of Plasma Physics (IPP) in Prague during experimental campaigns in 2014–2016. In order to investigate an electron-beam energy distribution a three-channel probe equipped with the Cherenkov-type detectors sensitive to electrons of different energies has been constructed. The measurements performed by means of these detectors showed that the first fast electron peak appears usually in the current ramp-up phase, even before the hard Xrays (HXR) pulse. Some electron signals can also be observed during subsequent HXR emissions.nHowever, the most distinct electron peaks in all energy channels appear mainly during the plasma disruption. A correlation of Cherenkov signals with the MHD activity was also studied.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

21100 - Other engineering and technologies

Projekt

<a href="/cs/project/LM2015045" target="_blank" >LM2015045: COMPASS – Tokamak pro výzkum termonukleární fúze</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Journal of Instrumentation

ISSN

1748-0221

e-ISSN

—

Svazek periodika

12

Číslo periodika v rámci svazku

October

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

—

Kód UT WoS článku

000414167000014

EID výsledku v databázi Scopus

2-s2.0-85033665917