Experimental measurements of ICRF and edge plasma interactions on Tore Supra

Conference · Thu Sep 01 04:00:00 EDT 1994

OSTI ID:10183674

Harris, J H; Thomas, Jr, C E; Hogan, J T; Haste, G R; Tobin, S; Klepper, C C ^[1]; Saoutic, B; Beaumont, B; Becoulet, A; Kuus, H ^[2]

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1. Oak Ridge National Lab., TN (United States)
2. Centre d`Etudes de Cadarache, St. Paul lez Durance (France); and others

Experiments to explore the interaction of Ion Cyclotron Range of Frequencies (ICRF) heating with the edge plasmas on the Tore Supra tokamak have been undertaken. The actively cooled, lateral protection (bumper limiters) on the three ICRF antennas in Tore Supra can experience overheating for power levels > 2 MW per antenna and pulse lengths > 2 seconds (depending on the power level) even when the antennas are operated in dipole mode. It appears that the local power fluxes on the lateral protection may exceed the nominally expected fluxes of 5 MW/m{sup 2}. Concentrated heat fluxes can result in hot spots with temperatures > 1000{degrees}C and can result in damage to the carbon tiles that make up the armor on the lateral protection. Initial experiments with plasmas having I{sub p} = 0.8 - 1.6 MA, q(a) = 3 - 6, and P{sub RF} = 1 - 2 MW have been carried out to characterize the phenomena that could contribute to the overheating and develop the diagnostic tools to be used in more comprehensive studies.

• Research Organization: Oak Ridge National Lab., TN (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 10183674
• Report Number(s): CONF-940635--15; ON: DE94019154
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700350
700420
HEAT FLUX
HOT SPOTS
ICR HEATING
LIMITERS
PLASMA PRODUCTION, HEATING, CURRENT DRIVE, AND INTERACTIONS
PLASMA-FACING COMPONENTS
TORE SUPRA TOKAMAK