Photoemission in Nanosecond and Picosecond Regimes Obtained from Macro and Micro Cathodes

摘要

For Lasertron studies at LAL, results obtained from tests on different photocathodes are given below. Using respectively two Nd: YAG lasers (a nanosecond one and a picosecond one) we have determined the level and the intensity of pulsed photoemission and the photoelectric yield in UV, green and infrared lights. We obtained a total current of more than 1 A with nanosecond width from a single W needle, and photoconversion yield of more than 1 was reached in green and UV lights. In classical pulsed photoemission, obtained photoconversion yield from LaB/sub 6/ photocathode was of about 10/sup -3/ in higher fields. (ERA citation 13:004156)