User name Rachek
Log entry time 15:26:07 on February 1,2002
Entry number 81481
keyword=Cables Damage Report
In the "short cables bundle" running between Calorimeter platform and DAQ electronics rack we have :
* 2 fast cables:
-- #1 PHOTON single arm trigger
-- #2 Cosmics at calorimeter trigger
* 4 RG-74 cables :
-- #1 Laser trigger
-- #2 used only during HRS<->Calorimeter coincidence timing measurements
-- #3 and #4 unused, disconnected at both ends
* 1 HV cable, used for laser trigger phototube.
It was found that in the Friday night accident:
* both fast cables remain undamaged (I checked signals with oscilloscope - OK)
* RG-74 cables #1, #2, #4 were damaged; #3 - OK
* HV cable was broken
That means that the accident affected only Laser trigger, while
the main trigger signal ("PHOTON") was fine and data collected for
RCS experiment are valid.
During Control Access Albert repaired all cables and I checked that
Laser trigger circuit is now operational.