Session 7F - DIII-D: Edge and H-Mode.
ORAL session, Thursday morning, November 14
Vail Room, Adam's Mark
On DIII--D, visible and ultraviolet spectroscopy are used to characterize divertor emissions. Carbon emissions during ELMing H--mode and D_2 radiative divertor operations account for 50%--80% of the total radiated power in the divertor with the remainder from deuterium.(R.D. Wood, et al.), 22nd EPS Conference on Controlled Fusion and Plasma Physics, Kiev, Ukraine, 1996.^,(R.C. Isler, et al.), submitted to Physics of Plasmas, 1996. In the case of neon injection with D_2 puffing and pumping, the strong radiating zone near the X-point consists of 80% carbon and less than 20% neon. With nitrogen injection, about half of the total radiated power comes from nitrogen. In all these cases, the total radiated power derived from spectroscopy is in good agreement with bolometer measurememts. Details of the spectroscopic analysis and a comparision of these data with two-dimensional radiated power density distribuiton and visible TV data will be presented.