1. On re-checking which PVDIS triggers went from which group to the Trigger Supervisor, we found that T3, T4 and T5 went from group 5 while T6 was from group 4. Next we replaced T3 by a 100 Hz pulser and it (T3) went to trigger supervisor as T6 (because of programmable delay availability. The trigger labled as T6 in level translator in the 2nd floor goes as T3 and that labled as T3 goes as T6 in the trigger supervisor, we need to re-lable them latter).
2. Removed the 12 ns delay in gr5 in the branch of discriminator to 2nd ANDing module (done on May 19th access, see halog 274757) for electron narrow signals.
3. Aligned the newly formed PVDIS triggers (as defined above) T4 and T5 with T1 (currently T3 is not aligned with T1, need to investigate in later access).
4. Did regrouping in shower detector in 8 groups instead of pre-planned preshower regrouping. This will be detailed in later halog entry. With this regrouping, there are still all PMT signals observed that used to be observed previously, but we need to make new database so as to see previously seen PMT-histograms staying at the same PMT-channel (we will finish this database work tomorrow since we could not finish it today).
A copy of this log entry has been emailed to: doug,camsonne,xiaochao,rsubedi,zhaobo