06/07/2007
Clean the Mainframes
Ryan and I vacuumed the HV mainframes today. We uncovered the top covers on the West and East mainframes, but for the RICH one, since there were too many stuff on top of the cover, we vacuumed it from the back of the mainframe instead.
Received two repaired HV boards
06/08/2007
Fix Trips
During the cosmic run test this afternoon, we found one trip during the FILL, another two during the RUN stage. I went down the pit and debug them:
- West S1S1 Ch1 (DR AnodeLayer8, Sector 3,4)
1. Take Sector 3 off. -> 2000V OK 2. Take Sector 4 off -> 2000V OK 3. Put Sector 3 and 4 on -> Trip 2000V 4. Use 1.1.0 jump to the other bus connector to power Sector3 and 4 -> OK. 5. Use 1.1.1 connect to the same bus connector to power -> OK. Fixed.
So, the connector in bus was bad.
- West S6S1 Ch0
1. Remove the jumper connecting to L45 -> 2100V OK. 2. Replace another jumper -> 2100V OK. Fixed.
So, the jumper was bad.
- East S5S1 Ch21
1. Reproduce the trip -> 2100V OK. A fake trip. Done.
Then I tested from the CLEO counting room for FILL and RUN, it's OK now.
06/11/2007
Test Board #17 and #46
- Board #46 (Not recognized by the mainframe before)
It is recognized now.
Bulk 0: 2100V, 34.5Au, 4.25uA/ch OK. Bulk 1: Ch8 trips at 1300V, current is 0 all the time. Others are OK. Bulk 2: 2100V, 34.5uA, 4.25uA/ch OK.
- Board #17 (Not recognized by the mainframe before)
Recognized now.
Bulk 0: 2100V, 34.7uA, 4.25uA/ch OK. Bulk 1: 2100V, 34.5uA, 4.26uA/ch OK. Bulk 2: 2100V, 35.1uA, 4.27uA/ch OK.
Update the Modulelog and sparelog at:
http://www.lepp.cornell.edu/~xs32/private/hv/ModuleLog.html
http://www.lepp.cornell.edu/~xs32/private/hv/SpareBoards.html
Write to elog.
06/26/2007
Fix the issue of DR L39, Sector 25 zero current
DR AnodeLayer 39, Sector 25 along with DR AnodeLayer 42, Sector 25 DR AnodeLayer 42, Sector 26 DR AnodeLayer 42, Sector 27
are powered by HVEast S5S1.22. From the terminal window, it looks that this channel has zero current when the voltage is 2100V. So, I just jumpered the power from the above one, i.e. S5S1.21.
Now, the constant map need to be updated accordingly.
Update the detector map
- HVDetectorMap_ref.txt file