Figure 4

Photocathodes photographs w/o multipacting. Photographs of the photocathode deposited on the puck with use (a) and without use (b) of a cap shielding the puck edge.
Photocathodes photographs w/o multipacting. Photographs of the photocathode deposited on the puck with use (a) and without use (b) of a cap shielding the puck edge.