Electron temperature distribution measurement of a field-reversed configuration plasma from the attenuation of helium and hydrogen mixed beam

For the estimation of the electron temperature of field-reversed configuration plasma, the helium and hydrogren mixed neutral beam attenuation method is proposed. In the first step, a one-chord beam attenuation experiment is presented, in order to confirm the proposed method. For the multichord measurement, a new system is introduced, which employed the bucket ion source, the electric energy analyser, the momentum selector with the permanent magnet and the microchannel plate.