Difference between revisions of "TOF Performance"
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'''Run 72840 with fixed single effective velocity'''<br> | '''Run 72840 with fixed single effective velocity'''<br> | ||
[[File:tof_performance_apr2021.png | 300px]] | [[File:tof_performance_apr2021.png | 300px]] | ||
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| + | === Test with run 72740 and 72840 === | ||
| + | A similar test is done with two runs comparing the timing resolution or separation power between protons on pions at a momentum of 4GeV/c before and after using a single effective velocity. | ||
| + | <br>'''BEFORE (CCDB July21)'''<br> [[File:TOFperfromance_72740_72840_Jul2021_at4.0.gif | 300px]]<br> | ||
| + | <br>'''AFTER (CCDB Apr24)''' <br> [[File:TOFperfromance_72740_72840_Apr2024_at4.0.gif | 300px]] <br> | ||
Revision as of 15:01, 8 May 2024
TOF Performance
A measure of the TOF performance is the width to the pion 
distribution as a function of momentum. The smaller this number the better protons can be separated from pions at higher momenta. It was found that using a single fixed effective velocity for all paddles in the TOF detector yields a better performance then using individual values for this velocity as determined from calibration of the TOF. To demonstrate this the following two plots show the beta of positive particles in TOF with a momentum of 4 GeV/c. The first pictures shows data from run 72840 with database parameters from Jul 2021 where each paddle had a separate velocity while the second plot shows the same data but with a single velocity for all paddles:
Run 72840 with variable effective velocity
Run 72840 with fixed single effective velocity
Test with run 72740 and 72840
A similar test is done with two runs comparing the timing resolution or separation power between protons on pions at a momentum of 4GeV/c before and after using a single effective velocity.
BEFORE (CCDB July21)
AFTER (CCDB Apr24)
