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NKS2 Meeting - Tagging Efficiency of October data -

NKS2 Meeting - Tagging Efficiency of October data -. Kyo Tsukada. Events (1). 10/9 9:00 start 10/9 15:00 preparation for experiment Radfile : 5mA40sec1009.sig, center = 54.7, (15:00~ ) 10/10 18:00 We found that the tagging efficiency was too low. Run1702 - 1707

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NKS2 Meeting - Tagging Efficiency of October data -

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  1. NKS2 Meeting- Tagging Efficiency of October data - Kyo Tsukada

  2. Events (1) • 10/9 9:00 start • 10/9 15:00 preparation for experiment • Radfile : 5mA40sec1009.sig, center = 54.7, (15:00~ ) • 10/10 18:00 We found that the tagging efficiency was too low. • Run1702 - 1707 • Radfile : 5mA40sec1010.sig, center = 54.8, (18:00~ ) • 10/11 0:35 We moved the start timing of the spill gate from 3rd step to 4th step ( delay of about 0.1 sec ). • Radfile : 5mA40sec1010-2.sig, center = 54.8, ( 0:35~ ) • 10/11 8:00 We confirmed the low efficiency again. • Run1720 • Picture of the output of RateMeter @16:00 • Radfile : 5mA40sec1011.sig, center = 54.7, ( ?18:00~ )

  3. Events (2) • 10/12 8:00 Tagging efficiency • Radfile : 5mA40sec1012.sig, center = 54.1, ( 6:15~ ) • Run1737 • 10/12 9:00 Beam tuning • Radfile : 5mA40sec1012-2.sig, center = 54.83, ( ?12:30~ ) • 10/12 14:00 Tagging efficiency • Run1740 • Radfile : 5mA40sec1012-3.sig, center = 54.7, ( 18:00~ ) • 10/12 22:00 We checked the tagger hit pattern for BM4 ON/OFF and BM5 ON/OFF. • Run1747 – 1750 • Radfile : 5mA40sec1013.sig, center = 54.6, ( 10/13 4:00~ ) • Radfile : 5mA40sec1013-2.sig, center = 54.7, ( 10/13 9:30~ )

  4. Events (3) • 10/13 18:00 Tagging efficiency • Run1770 • 10/14 18:00 Tagging efficiency • Run1789 ( ~5kHz ) • Run1791 ( ~1.5kHz ) • Run1793 ( ~15kHz ) • Run1795 ( ~30kHz ) • 10/15 0:00 Tagging efficiency ( radiator did not move ) • Run1797 ( 5mA40secPos358.sig ) • Run1799 ( 5mA40secPos310.sig ) • Run1802 ( 5mA40secPos334.sig ) • 10/15 2:00 taking pictures • 10/15 5:00 Tagging Efficiency ( relatively high intensity ) • Run1803 - 1804

  5. Radiator file • Flat top : 40.5 [sec] • Beam width s : 0.9 [mm] • Beam center : 54.7 [mm] • #parameter : 400 • Etc.

  6. Tagging Efficiency Example of ADC spectra of LG TagF1 • Definition: • ADC Gate : Led Line • Eff = #Right / #All TagF48

  7. Run1720 • Intensity ~ 8kHz • Radfile : 5mA40sec1010-2.sig, center = 54.8 • #Event/Spill ~ 60000 • Efficiencies for every 10000 events. • Efficiencies became worse as the radiator moved near the beam or as the time passed.

  8. Run1737 • Intensity ~ 3kHz • Radfile : 5mA40sec1012.sig, center = 54.1 • #Event/Spill ~ 50000 • Efficiencies for every 10000 events.

  9. Run1740 • Intensity ~ 5kHz • Radfile : 5mA40sec1012.sig, center = 54.1 • #Event/Spill ~ 60000 • Efficiencies for every 10000 events. • Before this run, the beam tuning was done.

  10. Run1770 • Intensity ~ 7kHz • Radfile : 5mA40sec1013-2.sig, center = 54.7 • #Event/Spill ~ 60000 • Efficiencies for every 10000 events.

  11. Run1789 • Intensity ~ 5kHz • Radfile : 5mA40sec1013-2.sig, center = 54.7 • #Event/Spill ~ 60000 • Efficiencies for every 10000 events. • From this run, we checked the rate dependence.

  12. Run1791 • Intensity ~ 1.5kHz • Radfile : 5mA40sec1013-2.sig, center = 54.7 • #Event/Spill ~ 30000 • Efficiencies for every 10000 events.

  13. Run1793 • Intensity ~ 15kHz • Radfile : 5mA40sec1013-2.sig, center = 54.7 • #Event/Spill ~ 70000 • Efficiencies for every 10000 events.

  14. Run1795 • Intensity ~ 30kHz • Radfile : 5mA40sec1013-2.sig, center = 54.7 • #Event/Spill ~ 80000 • Efficiencies for every 10000 events. • When radiator moved, the efficiency was more stable as the beam intensity was higher.

  15. Run1797 • Intensity ~ 9.5kHz • Radfile : 5mA40secPos358.sig • #Event/Spill ~ 70000 • Efficiencies for every 10000 events. • From this run, we checked the radiator position dependence.

  16. Run1800 • Intensity ~ 10kHz • Radfile : 5mA40secPos310.sig • #Event/Spill ~ 70000 • Efficiencies for every 10000 events.

  17. Run1802 • Intensity ~ 5kHz • Radfile : 5mA40secPos334.sig • #Event/Spill ~ 60000 • Efficiencies for every 10000 events. • When the radiator did not move, the efficiency was stable. • The efficiency was worse as the radiator was near the beam.

  18. Summary? • The radiator position dependence of the tagging efficiency may be not so small. • The dependence depends on the beam intensity ( it is improved as the beam intensity was high). • The efficiency itself is seemed to be improved as the time passed.

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