Abstract
A compact electron cyclotron resonance plasma source has been built and is being investigated in view of ion and x-ray production. A method recently developed to deduce the energetic electron temperature parameter from the bremsstrahlung spectra emitted by the plasma is adapted to the present plasma case and shows that this temperature parameter can reach a dozen keV. We show that the high-energy electrons are localized on a ring in the mirror midplane by obtaining the image of the x-ray emitters on the chamber walls with a pinhole camera. It indeed appears that the emitters are two rings, due to the hot electrons leaking towards the magnets from the midplane ring where they are located inside the plasma.
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