Concluding Summary

The momentum spread required to stabilize longitu-dinal modes in a proposed high current betatron is computed. The High Current Betatron A conventional betatron has been proposed for the acceleration of multikiloampere currents of electr0ns.l Stable operation is achieved by injecting current at sufficiently high energy that the space-charge-induced tune shift is dominated by image effects, which are compensated by external control of wall currents. High injection energy also permits the suppression of unstable longitudinal modes by momentum spread. Specific beam parameters are: (v-l)mc * = 50 MeV