turn down the hv and pull out the detector.  

suggest by 
Hi everybody,

is there now much more rate on  the detectors?

Perhaps it helps to turn down the bias for a while and to take the detectors out of the beam, by pulling the pocket out?

And then see if the leakage current comes down again.
good luck, Thomas

***********************************************
Dr. Thomas Faestermann  |  Tel:  +49-89-2723868
Physik Department E12   |
Techn. Univ. Muenchen   |  Mob:  +49-1626193388