Performance of 140 MeV High Curret Short Pulse Linac at ORNL

High current results of a 140-MeV electron traveling wave L-band linear accelerator are discussed. The 150-kV gridded gun injector has demonstrated pulse currents in excess of 30 A and pulse widths as narrow as 2.3 nsec at 1000 Hz. The accelerator wave guide sections are of nonuniform impedance design 4.3 m each and are driven by 24 mW, 67.5 kW L-band klystrons. Uniform solenoidal focusing is employed over the accelerating sections and quadrupole focusing is employed in beam transport. Short pulse current exceeding 16 A has been observed at the target position within an area of less than 4 Cm2.