DIVERTOR DIAGNOSTICS AND PHYSICS IN THE JT-60U TOKAMAK

Three bolometer arrays, an IR television camera, a photodiode array, s pectrometers, a Langmuir probe array, Penning gauges and quadrupole ma ss analyzers were installed for divertor diagnostics to study the dive rtor physics in the JT-60U tokamak. The radiative cooling divertor was investigated to reduce the heat load on the divertor plates using the se diagnostics. The mechanism of radiation losses was spectroscopicall y studied by visible spectroscopy. The heat and particle fluxes were m easured with fast sampling during the ELMy H-mode. Carbon generation c an be modelled very well. Helium exhaust from the core plasma was obse rved as a result of wall pumping caused by solid target boronization. (C) 1997 Elsevier Science S.A.