BigBite Scintillation Plane Calibration et cetera #22

In order to be able to find the matrix elements for the TgDelta variable, we decided first to calibrate ADCs and TDCs in the E and dE planes. This will allow us to apply additional cuts and precisely select events that will then be used for the final calibration of the TgY.

I am still calibrating ADC spectra for BigBite E and dE detectors. I have already gain matched PMTs on each paddle, but still trying to understand the y-dependence of ADC signals in the dE-plane. Here are my notes and some of the results:

My notes on the behavior of an ideal scintillation paddle: notes1.pdf

Old results:

Paddle No:5 (good one)



Paddle No:7 (bad one)

Paddle No:20 (very bad one)



Introduction of the exponential attenuation in the Scintillation bars: notes2.pdf

New results:

Paddle No:5



Paddle No:7

Paddle No:20


Last modified: 09/22/10