UV generated electron pulse - 23rd of December 2009

A view scope images. In purple the forward RF pulse, in green the reflected RF pulse, in light blue the beam dump signal measured over 50 Ohm.

1 - Clearly visible the large light blue spike which is the UV generated electron pulse measured in the beam dump.

2 - Same situation only now with the background of dark current visible. This can be achieved by changing the strength of the main magnet around the cavity.

3 - Now, we made the RF pulse shorter and changed the timing of the laser so that it arives at the end the RF pulse when the electric field in the cavity reaches it maximum.

4 - Zoom in at the end of RF pulse.