Contribution to the multi-machine pedestal scaling from the COMPASS tokamak. (6th April 2017)

• Record Type: Journal Article
• Authors: Komm, M.; Bílková, P.; Aftanas, M.; Berta, M.; Böhm, P.; Bogár, O.; Frassinetti, L.; Grover, O.; Háček, P.; Havlicek, J.; Hron, M.; Imríšek, M.; Krbec, J.; Mitošínková, K.; Naydenkova, D.; Pánek, R.; Peterka, M.; Snyder, P.B.; Stefanikova, E.; Stöckel, J.; Sos, M.; Urban, J.; Varju, J.; Vondráček, P.; Weinzettl, V.
• Other Names: collab.
• Is Part Of: Nuclear fusion. Volume 57:Number 5(2017:May)
• Publication Date: 2017-04-06
• Subjects: tokamak -- pedestal -- H-mode -- scaling -- COMPASS; Nuclear fusion -- Periodicals; 621.48405
• DOI: 10.1088/1741-4326/aa6659
• Languages: English
• ISSNs: 0029-5515

Abstract

Abstract: 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 ν ped ∗ < 1 at q95 ~3. COMPASS has approached conditions for the Identity experiment done at JET & DIII-D, complementing the range of scanned ρ ped ∗ . The pedestal pressure was successfully reproduced by the EPED model. The dependence of pedestal pressure width on ν ped ∗ and β ped pol is discussed.