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User name R. Subedi
Log entry time 12:06:59 on May19,2009
Entry number 274757
This entry is a followup to: 273292
Followups:
keyword=Access activity [PVDIS work]
Took opportunistic access during beam study time and made the following changes in the PVDIS setup without any interference with the regular RHRS DAQ.
1. Removed 8 ns from group4 in shower branch of SUM8 to linear sum [P/S 740].
2. Added 16 ns in group1 in shower branch of SUM8 to linear sum [P/S 740].
3. Added 8 ns in group2 and group3 in shower branch of SUM8 to linear sum [P/S 740]; removed existing 8ns black cable and added 16 ns gray cable.
4. Only in group5, added 12 ns cables in both of the narrow signals that go from discriminators to the second ANDing module so as to see if that makes a difference compared to other groups. This is anticipated since all these narrow signals are faster by about 10-14 ns compared to their wide counterparts. [Replaced existing 4ns cables by 16 ns cables hence effectively adding only 12 ns.]
5. Prepared a 100 Hz pulser using a gate generator to make tagger.
6. Added tagger in group5-8, i.e., removed the notNIM cables from the first ANDing module and put them in the second ANDing module.
7. Added another P/S 740 module in the branch of preshower SUM8 to medium threshold discriminator to mix tagger with pvdis signals in group5 to group8.
8. The P/S 740 module and a new 4 ns cable introduce about extra 14 ns delay. Hence added 16 ns in the TS to Discriminator branch for these 4 groups only.
9. Added tagger in the existing linear summing module [P/S 740] which has signals from SUM8 of shower detectors in group5 to goup8 only.
10. Added tagger in the veto-inputs [in the P/S 755 first two quads]. The first quad has a gas-cherenkov signal while the second quad has T1. The selector switch is still in "1" position even after adding the tagger [100 Hz].
11. Also added 16 ns delay in the veto signals for group5 to group8 ONLY.