Up/down impurity density asymmetries in C-Mod plasmas
نویسندگان
چکیده
منابع مشابه
Central Impurity Toroidal Rotation in ICRF Heated Alcator C-Mod Plasmas
Central impurity toroidal rotation has been observed in Alcator C-Mod ICRF heated plasmas, from the Doppler shifts of argon x-ray lines. Rotation velocities up to 1.3 10 m/s in the co-current direction have been observed in H-mode discharges that had no direct momentum input. There is a strong correlation between the increase in the central impurity rotation velocity and the increase in the pla...
متن کاملImpurity toroidal rotation and transport in Alcator C-Mod ohmic h-mode plasmas
Central toroidal rotation and impurity transport coe cients have been determined in Alcator C-Mod Ohmic High Con nement Mode (H-mode) plasmas from observations of x-ray emission following impurity injection. Rotation velocities up to 3 10 m/s in the co-current direction have been observed in the center of the best Ohmic H-mode plasmas. Purely Ohmic H-mode plasmas display many characteristics si...
متن کاملPoloidal variation of high-Z impurity density due to hydrogen minority ICRH on Alcator C-Mod
In the Alcator C-Mod tokamak, strong, steady-state variations of molybdenum density within a flux surface are routinely observed in plasmas using hydrogen minority ion cyclotron resonant heating. In/out asymmetries, up to a factor of 2, occur with both inboard and outboard accumulation depending on the major radius of the minority resonance layer. These poloidal variations can be attributed to ...
متن کاملImpurity compression and enrichment studies on Alcator C-Mod
Impurity transport has been investigated in the reactor-like conditions of the Alcator C-Mod divertor (divertor plasma density ≥1021 m-3, parallel heat flux in the SOL ≤0.5 GW-m-2). Trace amounts of the recycling impurity gases helium, neon, argon, and krypton were injected into plasmas. A residual gas analyzer that samples the private flux region of the divertor was used for divertor impurity ...
متن کاملMolybdenum emission from impurity-induced snakes on Alcator C-Mod
L. Delgado-Aparicio, M. Bitter, R. Granetz, M. Reinke, P. Beiersdorfer, D. Gates, K. Hill, N. Pablant, Y. Podpaly, J. Rice and L. Sugiyama Princeton Plasma Physics Laboratory, Princeton, NJ, 08540 MIT Plasma Science and Fusion Center, Cambridge, MA, 02139, USA 3 Lawrence Livermore National Laboratory, Livermore, California 94550, USA MIT Laboratory for Nuclear Science, Cambridge, MA, 02139, USA
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ژورنال
عنوان ژورنال: Nuclear Fusion
سال: 2018
ISSN: 0029-5515,1741-4326
DOI: 10.1088/1741-4326/aad966