CDC prototype more on timing 3

Latest approach to hit finding is as follows:

1. Find a hit channel and event pedestal
   1. Calculate mean pedestal P_m & s.d. (σ) for first 100 samples in 100 events (trigger is approx sample 200)
   2. Set a threshold T_p (eg 3.5 σ) for further investigation, eg P_m + T_p , select events & channels where adc value exceeds this
   3. Calculate event pedestal P_evt as mean of samples 90 to 190 in current event
   4. Select events where adc value goes over high threshold T_h1 + P_evt (T_h1 ~ 5sigma)
2. Use event pedestal to find high threshold time and new local pedestal
   1. Upsample data from samples 150 to 350 (max drift time + trigger time is approx sample 290)
   2. Search forward to find point x1 where data goes above a not quite so high threshold T_h2 + P_evt where T_h2 ~ 4 σ
   3. Find a local pedestal P_loc as adc value at N_p upsampled points (minisamples) before x1 (eg N_p=15)
3. Use local pedestal to find low threshold time
   1. Search backward from x1 to find point x2 where data goes below low threshold T_l + P_loc where T_l ~ σ

To find where to take local pedestal:

Mean change in ADC value

Mean change in ADC value