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ADVANCES IN HIGH-CURRENT-DENSITY PHOTOCATHODES |
Tan Kaisheng |
Institute of Electronics Acadcmio Sinica Beijing |
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Abstract For a long time past, photocathodes have been used in radiation detectors and image tubes for the detection of low light level. Almost all photocathodes for above purposes have been designed to be low-current-density status (<1μA/lm) and rapidly fatigued by high illumination. In 70s, photocathodes, emerged as a means of generating high-current-demsity photoemission under the continuous or pulsed laser beam illuminations. This paper emphatically reports the advances in high-current-density photocathodes in this period and describes its applications. Finally, the evaluations and comparison are given.
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Received: 18 August 1987
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