Make New Entry, Make Followup Entry
User name brads
Log entry time 22:33:57 on March12,2009
Entry number 265722
This entry is a followup to: 265438
keyword=Cerenkov PMTs 9, 10 same as before amplifier changeThose PMTs were reconfigured to bypass the second 10x amplifier used on the small angle side. HVs were increased to compensate.
Doesn't look like there's a significant difference in the spectra. Good news: chaining the amplifiers seems to work as well as expected under load. Bad news: noise and pile-up is still a challenge on the beamline side (no surprise there).
FIGURE 1
FIGURE 2
