Stability of negative electron affinity Ga0.37Al0.63As photocathodes in an ultrahigh vacuum system.
作者： Xinlong Chen , Guanghui Hao , Benkang Chang , Yijun Zhang , Jing Zhao
DOI: 10.1364/AO.52.006272
关键词:
摘要: The stability of negative electron affinity Ga0.37Al0.63As photocathodes in an ultrahigh vacuum system has been investigated. degraded photocurrents the Cs/O activated under illumination with different intensity are recorded real time, and quantum efficiencies measured after degradation. photocathode no at regular intervals. Multiple activations performed on photocathode, that measured. results indicate lifetime increases as decreases, is longer than GaAs case illumination. Besides, second activation would obtain optimal stability.
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