Profile measurements in the plasma edge of mega amp spherical tokamak using a ball pen probe

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F15%3A00443592" target="_blank" >RIV/61389021:_____/15:00443592 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1063/1.4908572" target="_blank" >http://dx.doi.org/10.1063/1.4908572</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/1.4908572" target="_blank" >10.1063/1.4908572</a>

Result language

angličtina

Original language name

Profile measurements in the plasma edge of mega amp spherical tokamak using a ball pen probe

Original language description

The ball pen probe (BPP) technique is used successfully to make profile measurements of plasma potential, electron temperature, and radial electric field on the Mega Amp Spherical Tokamak. The potential profile measured by the BPP is shown to significantly differ from the floating potential both in polarity and profile shape. By combining the BPP potential and the floating potential, the electron temperature can be measured, which is compared with the Thomson scattering (TS) diagnostic. Excellent agreement between the two diagnostics is obtained when secondary electron emission is accounted for in the floating potential. From the BPP profile, an estimate of the radial electric field is extracted which is shown to be of the order 1 kV/mand increases with plasma current. Corrections to the BPP measurement, constrained by the TS comparison, introduce uncertainty into the ER measurements. The uncertainty is most significant in the electric field well inside the separatrix.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BL - Plasma physics and discharge through gases

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2015

Confidentiality

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

Name of the periodical

Review of Scientific Instruments

ISSN

0034-6748

e-ISSN

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Volume of the periodical

86

Issue of the periodical within the volume

2

Country of publishing house

US - UNITED STATES

Number of pages

9

Pages from-to

023510-023510

UT code for WoS article

000350552700029

EID of the result in the Scopus database

2-s2.0-84923899679