J. Phys. III France
Volume 2, Numéro 3, March 1992
Page(s) 473 - 480
DOI: 10.1051/jp3:1992142
J. Phys. III France 2 (1992) 473-480

Experimental study on lifetimes and current production from a GaAs electron source

R. Calabrese1, V. Guidi1, 2, G. Lamanna3 and L. Tecchio2

1  Dipartimento di Fisica dell' Universita' and INFN, I-44100 Ferrara, Italy
2  Laboratori Nazionali di Legnaro, I-35020 Legnaro, Italy
3  Dipartimento di Fisica dell' Universita' and INFN, I-70120 Bari, Italy

(Received 5 July 1991, revised and accepted 8 November 1991)

A very low pressure activation which allows an improved current emission has been carried out on a GaAs NEA activated photocathode. The experiments show that, under a pressure threshold, several hundreds of $\mu$A current are delivered continuously for some days.

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