Characteristics of X-point lobe structures in single-null discharges on MAST

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F14%3A00434796" target="_blank" >RIV/61389021:_____/14:00434796 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1088/0029-5515/54/6/064015" target="_blank" >http://dx.doi.org/10.1088/0029-5515/54/6/064015</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/0029-5515/54/6/064015" target="_blank" >10.1088/0029-5515/54/6/064015</a>

Result language

angličtina

Original language name

Characteristics of X-point lobe structures in single-null discharges on MAST

Original language description

Lobe structures due to the application of resonant magnetic perturbations (RMPs) have been observed using wide-angle imaging of light from He1+ ions in the vicinity of the lower X-point in MAST. Above a threshold value the lobe structures extend radially, linearly with the coil current, both in L-mode and H-mode. After the application of the RMP, as the toroidal rotation in the confined plasma decreases, the lobes extend radially. This suggests the plasma is less effectively screening the RMP field. Comparing the imaging data with results from vacuum modelling shows that this technique can accurately predict the number and poloidal location of the lobes, but over-estimates their radial extent. More accurate estimates of the extent of the lobes can be made by accounting for plasma screening of the RMP field. Qualitative agreement between simulation and experiment is found if it is assumed that the RMP penetrates 2% in normalized radius from the last closed flux surface.

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

<a href="/en/project/GAP205%2F11%2F2341" target="_blank" >GAP205/11/2341: Control of edge localized modes in tokamaks by external magnetic perturbations</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2014

Confidentiality

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

Name of the periodical

Nuclear Fusion

ISSN

0029-5515

e-ISSN

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Volume of the periodical

54

Issue of the periodical within the volume

6

Country of publishing house

AT - AUSTRIA

Number of pages

9

Pages from-to

064015-064015

UT code for WoS article

000336893100016

EID of the result in the Scopus database

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