Difference between revisions of "First look at TOF calibration"

Revision as of 14:34, 15 April 2015

First Look

• first select data sample with the following conditions:
  1. only consider hits within 50ns of the timing peak both for ADC data and TDC data
  2. only consider paddles that have hits on both ends
  3. take care of the 6fold trigger timing shift in the TDC (24ns window)

• do a rough determination of the walk correction by using the time in the ADC as reference.
  1. calculate Time difference:
  2. calculate Integral: I = pulse_integral - pulse_pedestal*nsamples
  3. Note: the minimum ionizing peak is between 6000 and 10000

• do mean time comparison between different planes
  1. calculate MeanTime of Paddle i in plane j:
  2. calculate MeanTime for all Paddles n in plane k:
  3. for each event plot for each paddle in plane k:
  4. 
  5. fit the meant time peak of each projection:
  6. example 1
  7. example 2
  8. Do this for each paddle in the first plane as reference paddle.
  9. Choose one paddle in the first plane as THE REFERENCE PADDLE
  10. Calculate the difference between the fit results of each paddle in the first plane w.r.t. THE REFERENCE PADDLE and fit the distribution
  11. average difference of mean time to REFERENCE PADDLE