Difference between revisions of "Left HRS Scintillator Timing"
(→Second Iteration) |
|||
| Line 18: | Line 18: | ||
<br> | <br> | ||
| + | In this iteration, I fine-tuned the time offsets to improve the corrected time between paddles to remove the remaining | ||
| + | shifts from the previous iteration. The figures on the left show the time versus paddle for S1 and S2m are now | ||
| + | much improved over the first iteration. The resolution of the beta spectrum has already improved to about 0.116. | ||
| + | However, we still see that the resolution in beta is limited by the discontinuities seen in the beta versus track x | ||
| + | plot. | ||
[[Image:s1_wrt_s2m_times.gif]] | [[Image:s1_wrt_s2m_times.gif]] | ||
Revision as of 22:30, 26 November 2008
Initial Time Offset Calibration
S1 and S2m time difference and corrected time plots for run 2512 after initial time offset calibration:
The left figure shows that the time differences are fairly well calibrated, but the corrected times show some shifts
for a few paddles in S1 and S2m. The beta spectrum shows some discontinuities that I thought might be related to
the time offset shifts. I will present more on this in the discussion below. The beta spectrum has a long tail for beta greater than 1, and the beta resolution is about 0.14.
Second Iteration
For the second iteration, I decided to look at a recent production run: 3789.
In this iteration, I fine-tuned the time offsets to improve the corrected time between paddles to remove the remaining shifts from the previous iteration. The figures on the left show the time versus paddle for S1 and S2m are now much improved over the first iteration. The resolution of the beta spectrum has already improved to about 0.116. However, we still see that the resolution in beta is limited by the discontinuities seen in the beta versus track x plot.
