04/10/2007
Remove the West Slot 7 board
During the access time this morning, I took the HV board(HV#37) on Pit West Slot 7. Then we run the HV server with Tag : HVTest_noWS7 without seeing any problem. After that, I jumped the patch panel in the West to power Layer 45 by 34, 46 by 35, and 47 by 36. i.e. S7 by S6 in the West.
We tested the server by rumping to FILL and RUN and didn't see any problem.
One thing need to mention is that the sector in Layer 34, channels 16-18 are now powering up four sectors in total. More precisely, it powers L34-ch16,17,18, L34-ch19,20,21, L45-ch16,17,18, L45-ch19,20,21. By far, no extra currents noticed on those channels.
Update the HV Module Board log: (HV37)
04/11/2007
Update HVNormal
Cannot open the SessionManager on solon2.
Finish the work at the counting room.
04/20/2007
HV Board 37
Taken back from Margie.
04/24/2007
Replace #45 board with #37 from HVEast slot 5
Due to the occasional non-recognition problem happened on HVEast slot 5, I took out that board (#45) and replaced it with the good spare board #37. I have sent the #45 board to electric shop for cleaning and will investigate it after taking back.
All of the board status have been updated on page:
http://www.lepp.cornell.edu/~xs32/private/hv/ModuleLog.html
Wrote to e-log.
04/30/2007
Update spare boards info
done.
Prepare tag for sending out board 16,17,46
------------------------------------------------------------------- HVBoard #16 ------------------------------------------------------------------- Symptom: - Bulk 0,1 ramp to 2.5kV overload - Bulk 2 trips when ramping (with load or w/out). If bulk 1 is under load and bulk 2 enabled, it trips at ~2300V. ------------------------------------------------------------------- HVBoard #17 ------------------------------------------------------------------- Symptom: - Not recognized by mainframe on boot-up. ------------------------------------------------------------------- HVBoard #46 ------------------------------------------------------------------- Symptom: - Mainframe does not recorgnize module. - Pulls down voltage on backplane. 800 kHz clock to half ampl. SI signal disappears. -------------------------------------------------------------------
Print out and place them on board and envelope.