X-ray spectra for 10 keV less than h v less than 100 keV from the Alcator C tokamak

X-ray emission between 10 and 100 keV has been observed from the Alcator C tokamak using a new HgI2 x-ray detector and pulse-height-analysis system and is discussed in this paper. This spectrometer operates at room temperature and provides access to the intermediate energy portion of x-ray emission between the regions normally viewed by Si(Li) and NaI detectors. Spectra have been obtained during normal high density operation, at lower densities and for discharges when RF power is introduced into the plasma. Information concerning the electron distribution function obtained from the x-ray spectrum are compared with measurements of electron cyclotron emission