Here is a data library with PMT signals with different attenuators. The dynamic rage is from 1 pC to 2000 pC.

The data are collected using R5900 PMT with active dividers and 676 V. Patrick's LED 4 ns width and David's setup

Download data from https://atlaswww.hep.anl.gov/asc/phase2/data/, and then gunzip it. To make a plot for 1 trace, use

wget https://atlaswww.hep.anl.gov/asc/phase2/data/pmt_signals_phase2.tgz -O - | tar -xz;
cd pmt_signals_phase2/
python show_trace.py data/D1_traces_full.txt.gz 1

We used 1 neutral density filter 50% (NDF50), and 1 neutral density filter x16 (NDF16). Data files with traces are in “data/*”. the file names has a letter “D” that indicates attenuation strength for the light.

1. D1 NDF16 + 6xNDF50
2. D2 NDF16 + 5xNDF50
3. D3 NDF16 + 4xNDF50
4. D4 NDF16 + 3xNDF50
5. D5 NDF16 + 2xNDF50
6. D6 NDF16 + 1xNDF50
7. D7 NDF16
8. D8 3xNDF50
9. D9 2xNDF50
10. D10 1xNDF50
11. D11 - no NDF

All figures for 1000 traces are in “figures”. We use a numeric noise suppression as shown in this image.