Study on the low frequency plasma oscillations in cyclotron multicharged ion source

The low frequency plasma oscillations jn a cyclotron ion source with indirect heating cathode are studied to find out the connection of these oscillations with the multicharged ion yield. The ion charge state distribution and frequency spectrum of a plasma have been simultaneously recorded with different operating parameters of the source. The ion charge state distribution was analyzed in the 180 deg magnetic mass-analyser. Plasma oscillations were recorded by the Langmuir probe. The probe current spectrum of oscillations are recorded by a spectrum analyser. The dependences of Ne, Ar, Kr, Xe ions yield and amplitudes of probe currents oscillations from discharge voltage and current and gas flow rate are obtained. It is established that there exist correlations between amplitudes of some frequency oscillations and multicharged ion extracted currents