Measurement of the temporal response of ferroelectric cathodes

Details Measurement of the temporal response of ferroelectric cathodes Measurement of the temporal response of ferroelectric cathodes

2000-07-26

arxiv.org/abs/physics/0007081v2

eConf C000821 (2000) MOc10

Physics

Accelerator Physics

3 pages, 6 figures

Scientific paper

Ferroelectric ceramics are tested as photocathodes at INFN Frascati Laboratories. In order to characterize them for use in linac injectors it is important to measure the temporal shape of the emitted current. With a duration of the laser pulse of 25 ps, the required resolution is a few ps. An apparatus has been set up for the purpose, consisting of a 30 kV electron gun, a microwave deflecting cavity which translates the temporal distribution of the electron bunch into a spatial one, a fluorescent screen on which the deflected beam traces a sector of a circle and various focusing and charge measuring items. The image on the screen is detected via a CCD camera and a frame grabber. We describe the performance of the apparatus and some preliminary temporal distribution measurements.

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