ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
A photocathode made from polycrystalline lanthanum hexaboride (LaB6) has produced nanosecond-length electron pulses when excited by an excimer laser at 308 nm. Peak currents in excess of 1 A have been observed, with quantum yields of 4×10−5 being measured. A method for extracting the electrons from an emission-limited cathode, plasma extraction, has been demonstrated. This technique uses a low-power continuous discharge to provide the electric field needed to extract the photoelectrons. This technique may be useful in producing high-repetition-rate short-pulse ion sources.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1141893
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