SINGLE BUNCHED BEAM GENERATION WITHOUT SUBHARMONIC PREBUNCHER

The intensity of the accelerated single bunched electron beam depends on the performance of the electron gun and the fast cathode pulser. Th e electron beam is emitted by a Y-796 cathode assembly with a cathode of 2 cm(2) (8 A/cm(2)), and an extracted voltage of 90 kV. The maximum charge of the single bunched beam was attained at 1.5 nC/pulse using SHB. Recently, a single bunched beam has been generated by an ultrafas t cathode pulser (rise and fall time < 100 ps pulse height -2 kV at 50 Omega) without SHB. The charge of the accelerated electron beam is ab out 40 pC/pulse (pulse width < 10 ps) without the production of a sate llite beam. This result show that a single bunched beam can be produce d by the linear accelerator without SHB.