ADC spectrum with Americium source

Paul manufactured a system with Americium source to test bulk qunatities of future PMTs for TOF. Monochromatic Am spectrum allows to verify PMT's gains quickly.

Troubleshooting multiple timing peak problem

Trigger PMTs were replaced, re-wrapped and glued. 5 PMTs are now trouble-free (left plot). Only one PMT still exhibits multiple-peaks problem albeit at a smaller scale.