Abstract
A femtosecond synchroscan streak tube has been developed. In order to achieve femtosecond time resolution, followings have been adopted in the tube designing, i.e. high electric field application near the photocathode, plus high voltage application to the focusing electrode to reduce photoelectron transit time spread in the focusing region, and anode electric potential settled as low as possible to obtain very high deflection sensitivity for sweep. The tube has been designed by computer simulation of electron trajectory and the theoretical time resolution has been carried out to be approximately 520 fs. Based on the above designing, a prototype tube has been fabricated and evaluated. Time resolution of approximately 660 fs has been experimentally obtained at the synchroscan frequency of approximately 80 MHz.
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