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Article Dans Une Revue Applied Physics B - Laser and Optics Année : 2002

Grooving an alumina surface as a means to inhibit secondary electron emission under grazing incidence

Résumé

We observe charge multiplication of photoemitted electrons in cylindrical alumina cells, containing cesium vapor, submitted to a longitudinal electric field and to intense laser pulses. We present several diagnoses allowing us to attribute this charge multiplication to efficient secondary electron emission (SEE) from the accelerated photoelectrons colliding with the inner wall at grazing incidence. Machining millimeter-size triangular grooves on the initially smooth inner wall, so as to prevent grazing incidence, is shown to be efficient in reducing SEE. The atomic signal characteristic of the space charge accumulated close to the anode is found to be reduced by more than one order of magnitude. This result is of important significance, not only for our parity-violation experiment in cesium vapor, but also for experiments and techniques involving SEE at grazing incidence.

Dates et versions

hal-00002709 , version 1 (29-08-2004)

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Jocelyne Guéna, Erwan Jahier, Michel Lintz, Aram V. Papoyan, Stéfano Sanguinetti, et al.. Grooving an alumina surface as a means to inhibit secondary electron emission under grazing incidence. Applied Physics B - Laser and Optics, 2002, B75, pp.739. ⟨10.1007/s00340-002-1043-0⟩. ⟨hal-00002709⟩
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