2.1.3 Multilayer Samples

For higher UV suppression on the start surface multilayer surfaces were tested. The idea was to have an UV transparent top layer with a high secondary electron yield. Photo electrons would be released in the solid and not on the surface. These electrons would have a very short free path length and would not be able to escape to the surface producing false start events. Six of the tested surfaces fall into this category:

All these surfaces were tested for use both as start and conversion surfaces. Typical sample sizes were 1 to 2 cm\( ^{2}\).

March 2001 - Martin Wieser, Physikalisches Institut, University of Berne, Switzerland