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Proceedings Paper

Photoelectrons From Picosecond Laser Pulses On Mg
Author(s): N K Sherman; P B Corkum; T Srinivasan-Rao
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Paper Abstract

We find Mg illuminated in vacuum with picosecond UV pulses to be a robust and useful photocathode even at roughing pressures. Photocurrent densities as great as 180 A/cm2 occur at moderate collecting field strengths E of 0.5 to 2 kV/cm. In pulses briefer than the electron transit time across a diode, space charge causes the collected charge to increase linearly with anode voltage. The observed Mg quantum efficiency of 2.5 x 10-6 electrons per 300 nm photon was doubled by "red assist" when intense 600 nm pulses were simultaneously present. We give a criterion for Emin for complete charge collection from trains of picosecond optical pulses.

Paper Details

Date Published: 21 October 1986
PDF: 8 pages
Proc. SPIE 0664, High Intensity Laser Processes, (21 October 1986); doi: 10.1117/12.938685
Show Author Affiliations
N K Sherman, National Research Council of Canada (Canada)
P B Corkum, National Research Council of Canada (Canada)
T Srinivasan-Rao, National Research Council of Canada (Canada)


Published in SPIE Proceedings Vol. 0664:
High Intensity Laser Processes
John A. Alcock, Editor(s)

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