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LI Xiang-min, ZHOU Li-wei. Temporal Characteristics of GaAs NEA and Alkali Metal Photocathodes[J]. JOURNAL OF BEIJING INSTITUTE OF TECHNOLOGY, 2003, 12(4): 381-384.
Citation: LI Xiang-min, ZHOU Li-wei. Temporal Characteristics of GaAs NEA and Alkali Metal Photocathodes[J].JOURNAL OF BEIJING INSTITUTE OF TECHNOLOGY, 2003, 12(4): 381-384.
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Temporal Characteristics of GaAs NEA and Alkali Metal Photocathodes

  • Department of Optical Engineering, School of Information Science and Technology, Beijing Institute of Technology, Beijing100081, China

Funds:theNationalNaturalScienceFoundation(K69571005)
  • Received Date:2003-06-17
    Abstract
  • The temporal characteristics of GaAs NEA and alkali metal photocathodes are studied using Monte Carlo simulation method. The electron transit time and its distribution functions in the photocathodes are calculated. Based on the results, the time modulation transfer functions and temporal resolutions of the photocathodes are obtained. The results show that the response time and temporal resolution of alkali metal photocathode is in femitosecond order and those of GaAs NEA photocathode are in picosecond order.
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