Scrape-off layer power flux measurements in the Tore Supra tokamak

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F13%3A00395490" target="_blank" >RIV/61389021:_____/13:00395490 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.jnucmat.2013.01.055" target="_blank" >http://dx.doi.org/10.1016/j.jnucmat.2013.01.055</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jnucmat.2013.01.055" target="_blank" >10.1016/j.jnucmat.2013.01.055</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Scrape-off layer power flux measurements in the Tore Supra tokamak

Popis výsledku v původním jazyce

A new method to measure power flux in strongly magnetized plasmas is described, while the flaws inher- ent in standard Langmuir probe techniques are demonstrated. Instead of small cylindrical pins which overestimate the ion current density by several 100%, a concave probe has been developed which is immune to sheath expansion, and which inherently provides accurate measurements. A retarding field analyzer directly measures the ion component of the power flux by means of an integral method that eliminates the need to calculate the heat transmission factor. Evidence shows that strong secondary elec- tron emission from surfaces with non-oblique magnetic field incidence angles is ubiquitous in the scrape- off layer of the Tore Supra tokamak. This results in sheath collapse, causing the power flux to be dominated by the electrons. The radially integrated power flux measured by the probes agrees well with the power convected to the limiter.

Název v anglickém jazyce

Scrape-off layer power flux measurements in the Tore Supra tokamak

Popis výsledku anglicky

A new method to measure power flux in strongly magnetized plasmas is described, while the flaws inher- ent in standard Langmuir probe techniques are demonstrated. Instead of small cylindrical pins which overestimate the ion current density by several 100%, a concave probe has been developed which is immune to sheath expansion, and which inherently provides accurate measurements. A retarding field analyzer directly measures the ion component of the power flux by means of an integral method that eliminates the need to calculate the heat transmission factor. Evidence shows that strong secondary elec- tron emission from surfaces with non-oblique magnetic field incidence angles is ubiquitous in the scrape- off layer of the Tore Supra tokamak. This results in sheath collapse, causing the power flux to be dominated by the electrons. The radially integrated power flux measured by the probes agrees well with the power convected to the limiter.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BL - Fyzika plasmatu a výboje v plynech

OECD FORD obor

—

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2013

Kód důvěrnosti údajů

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

Název periodika

Journal of Nuclear Materials

ISSN

0022-3115

e-ISSN

—

Svazek periodika

438

Číslo periodika v rámci svazku

suppl

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

5

Strana od-do

"S184"-"S188"

Kód UT WoS článku

000330795300030

EID výsledku v databázi Scopus

—