Robustness of the tokamak error field correction tolerance scaling
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F20%3A00531556" target="_blank" >RIV/61389021:_____/20:00531556 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11320/20:10423239
Result on the web
<a href="https://iopscience.iop.org/article/10.1088/1361-6587/ab9a12" target="_blank" >https://iopscience.iop.org/article/10.1088/1361-6587/ab9a12</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1361-6587/ab9a12" target="_blank" >10.1088/1361-6587/ab9a12</a>
Alternative languages
Result language
angličtina
Original language name
Robustness of the tokamak error field correction tolerance scaling
Original language description
This paper presents the subtleties of obtaining robust experimental scaling laws for the core resonant error field threshold that leads to field penetration, locked modes, and disruptions. Recent progress in attempts to project this threshold to new machines has focused on advances in the metric used to quantify the dangerous error fields, incorporating the ideal MHD plasma response in a metric referred to as the 'dominant mode overlap'. However, the scaling of this or any quantity with experimental parameters known to be important for the complicated tearing layer physics requires regressions performed for databases that, for historical reasons, unevenly sample the available parametric space. This paper presents the distribution of the existing international n = 1 database and details biases in the available sampling and details the sensitivity of ITER projections to simple least-squares regressions. Downsampling and a simple kernel density estimation weighted regression are used here to demonstrate the difference in projections that acknowledging the machine sampling bias can make. This results in more robust projection to parameters far from the 'usual' devices built thus far. Two multi-device and multi-parameter scalings of the EF threshold in Ohmic and powered plasmas are presented, projecting the threshold to ITER and investigating the impact of sampling biases.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10305 - Fluids and plasma physics (including surface physics)
Result continuities
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
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Plasma Physics and Controlled Fusion
ISSN
0741-3335
e-ISSN
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Volume of the periodical
62
Issue of the periodical within the volume
8
Country of publishing house
GB - UNITED KINGDOM
Number of pages
8
Pages from-to
084001
UT code for WoS article
000551846200001
EID of the result in the Scopus database
2-s2.0-85088899814