COMPACT ELECTRON-CYCLOTRON-RESONANCE PLASMA SOURCE

A compact electron cyclotron resonance plasma source has been built an d is being investigated in view of ion and x-ray production. A method recently developed to deduce the energetic electron temperature parame ter from the bremsstrahlung spectra emitted by the plasma is adapted t o the present plasma case and shows that this temperature parameter ca n reach a dozen keV. We show that the high-energy electrons are locali zed on a ring in the mirror midplane by obtaining the image of the x-r ay emitters on the chamber walls with a pinhole camera. It indeed appe ars that the emitters are two rings, due to the hot electrons leaking towards the magnets from the midplane ring where they are located insi de the plasma, (C) 1998 American Institute of Physics.