A novel trapping scheme in the modified betatron accelerator

The previously reported 'self-trapping' of an electron ring in the modified betatron results from current flowing in the diode during a secondary pulse that follows the main pulse. A similar shift is produced by a current carrying conductor that is oriented along the toroidal magnetic field Bθ. Because 'self-trapping' is not very versatile, a new trapping scheme is being developed. In this scheme, an induction electric field is applied to a gap in the torus. Preliminary experimental results show that the equilibrium radius of the ring r/sub eq/ can be shifted by several centimeters