Fast infrared thermography on the COMPASS tokamak

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F17%3A10379319" target="_blank" >RIV/00216208:11320/17:10379319 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61389021:_____/17:00481820 RIV/68407700:21340/17:00326940

Výsledek na webu

<a href="https://doi.org/10.1016/j.fusengdes.2017.05.004" target="_blank" >https://doi.org/10.1016/j.fusengdes.2017.05.004</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.fusengdes.2017.05.004" target="_blank" >10.1016/j.fusengdes.2017.05.004</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Fast infrared thermography on the COMPASS tokamak

Popis výsledku v původním jazyce

A new fast infrared camera was purchased on the COMPASS tokamak recently. It is equipped with a medium wavelength infrared (3-5 mm) InSb detector and is capable of reaching framerate up to 1.9 kHz in full frame acquisition mode (320 x 256 px.) and up to 90 kHz in sub-windowed mode (64 x 4 px.). First experimental measurements of plasma heat flux to inner and outer wall limiters of the COMPASS tokamak using the new camera are presented. Time evolution of parallel heat flux during sawtooth instability is studied showing strong modulation of the heat flux absolute value whilst keeping constant its radial decay length. Fast modulation of outboard midplane limiter heat loading due to runaway electrons is also presented. The camera will be part of a new fast divertor thermographic system with exceptional spatial resolution (similar to 0.6-1.3 mm/px. on the target plane, 0.04-0.14 mmipx. mapped to the outer midplane) with a possibility of measurements of radial profiles on the divertor with 320 x 4 px. with temporal resolution better than 20 mu s. A design of the foreseen optical divertor system is described together with a design of a special divertor graphite tile used for the IR thermography, that will allow in-situ surface emissivity calibration.

Název v anglickém jazyce

Fast infrared thermography on the COMPASS tokamak

Popis výsledku anglicky

A new fast infrared camera was purchased on the COMPASS tokamak recently. It is equipped with a medium wavelength infrared (3-5 mm) InSb detector and is capable of reaching framerate up to 1.9 kHz in full frame acquisition mode (320 x 256 px.) and up to 90 kHz in sub-windowed mode (64 x 4 px.). First experimental measurements of plasma heat flux to inner and outer wall limiters of the COMPASS tokamak using the new camera are presented. Time evolution of parallel heat flux during sawtooth instability is studied showing strong modulation of the heat flux absolute value whilst keeping constant its radial decay length. Fast modulation of outboard midplane limiter heat loading due to runaway electrons is also presented. The camera will be part of a new fast divertor thermographic system with exceptional spatial resolution (similar to 0.6-1.3 mm/px. on the target plane, 0.04-0.14 mmipx. mapped to the outer midplane) with a possibility of measurements of radial profiles on the divertor with 320 x 4 px. with temporal resolution better than 20 mu s. A design of the foreseen optical divertor system is described together with a design of a special divertor graphite tile used for the IR thermography, that will allow in-situ surface emissivity calibration.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Fusion Engineering and Design

ISSN

0920-3796

e-ISSN

—

Svazek periodika

123

Číslo periodika v rámci svazku

November

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

4

Strana od-do

764-767

Kód UT WoS článku

000418992000159

EID výsledku v databázi Scopus

2-s2.0-85019160626