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Contribution to the multi-machine pedestal scaling from the COMPASS tokamak
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2017 (English)In: Nuclear Fusion, ISSN 0029-5515, E-ISSN 1741-4326, Vol. 57, no 5, 056041Article in journal (Refereed) Published
Abstract [en]

First systematic measurements of pedestal structure during Ohmic and NBI-assisted Type I ELMy H-modes were performed on the COMPASS tokamak in two dedicated experimental campaigns during 2015 and 2016. By adjusting the NBI heating and a toroidal magnetic field, the electron pedestal temperature was increased from 200 eV up to 300 eV, which allowed reaching pedestal collisionality nu(ped)* < 1 at q(95) similar to 3. COMPASS has approached conditions for the Identity experiment done at JET & DIII-D, complementing the range of scanned rho(ped)*. The pedestal pressure was successfully reproduced by the EPED model. The dependence of pedestal pressure width on nu(ped)* and beta(pol)(ped) is discussed.

Place, publisher, year, edition, pages
Institute of Physics (IOP), 2017. Vol. 57, no 5, 056041
Keyword [en]
tokamak, pedestal, H-mode, scaling, COMPASS
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-206677DOI: 10.1088/1741-4326/aa6659ISI: 000399098000002ScopusID: 2-s2.0-85017413647OAI: oai:DiVA.org:kth-206677DiVA: diva2:1094499
Note

QC 20170510

Available from: 2017-05-10 Created: 2017-05-10 Last updated: 2017-05-10Bibliographically approved

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