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Material and thickness for pi0

Material and thickness for pi0. Y.Sudo Univ. of Tsukuba 2008/07/25. Simulation for FNAL TB by Mokka I calculated probability that two gammas from pi0 are detected in SciEcal. I used Iron and Aluminum for target to make pi0. Parameters Beam : pi+

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Material and thickness for pi0

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  1. Material and thicknessfor pi0 Y.Sudo Univ. of Tsukuba 2008/07/25

  2. Simulation for FNAL TB by Mokka • I calculated probability that two gammas from pi0 are detected in SciEcal. • I used Iron and Aluminum for target to make pi0. • Parameters • Beam : pi+ • Energy : 25, 36GeV (5,10,16,25,36,50GeV for Iron 64mm) • Target material and thickness • Iron 32, 50,64, 96mm • Aluminum 100,150, 200,250mm

  3. Result1Iron 64mm • Energy Pi+ : N pi+ : N pi0 : probability(x10-4) • 5 : 51500 : 6 : 1.16 +- 0.48 • : 41500 : 6 : 1.44 +- 0.59 • : 31500 : 19 : 6.03 +- 1.39 • : 23221 : 28 : 12.06 +- 2.28 • : 15831 : 18 : 11.37 +- 2.68 • 50 : 10595 : 13 : 12.27 +- 3.41 N pi0 N pi+ • N pi+ is number of injected pi+ • N pi0 is number of events that two • gammas from pi0 are detected in the ECAL • probability is N pi0 over N pi+

  4. Summary pi+ 36GeV Material : thickness : probability(x10-4) Iron : 32mm : 9.33+- 3.53 : 50mm : 5.92 +- 2.96 : 64mm : 11.37 +- 2.68 : 96mm : 13.33 +- 4.22 Aluminum : 100mm : 16.67 +- 5.27 : 150mm : 18.67 +- 4.99 : 200mm : 18.67 +- 4.99 : 250mm : 13.33 +- 4.22 pi+ 25GeV Material : thickness : probability(x10-4) Iron : 32mm : 2.73 +- 1.58 : 50mm : 5.45 +- 2.23 : 64mm : 12.06 +- 2.28 : 96mm : 8.18 +- 2.73 Aluminum : 100mm : 12.50 +- 3.77 : 150mm : 15.45 +- 3.75 : 200mm : 17.27 +- 3.96 : 250mm : 16.36 +- 3.86 Al is better than Fe for material of the target to detect two gammas from pi0. 200mm thick Al is a little bit better than 150mm. But if 200mm thick Al is too big for the target, 64mm thick Iron is good.

  5. Result2Iron 32mm • Energy Pi+ : N pi+ : N pi0 : probability(x10-4) • : 11000 : 3 : 2.73 +- 1.58 • : 7500 : 7 : 9.33 +- 3.53 N pi0 N pi+

  6. Result3Iron 50mm • Energy Pi+ : N pi+ : N pi0 : probability(x10-4) • : 11000 : 6 : 5.45 +- 2.23 • : 6750 : 4 : 5.92 +- 2.96 N pi0 N pi+

  7. Result4Iron 96mm • Energy Pi+ : N pi+ : N pi0 : probability(x10-4) • : 11000 : 9 : 8.18 +- 2.73 • : 7500 : 10 : 13.33 +- 4.22 N pi0 N pi+

  8. Result5Aluminum 100mm • Energy Pi+ : N pi+ : N pi0 : probability(x10-4) • : 8800 : 11 : 12.50 +- 3.77 • : 6000 : 10 : 16.67 +- 5.27 N pi0 N pi+

  9. Result6Aluminum 150mm • Energy Pi+ : N pi+ : N pi0 : probability(x10-4) • : 11000 : 17 : 15.45 +- 3.75 • : 7500 : 14 : 18.67 +- 4.99 N pi0 N pi+

  10. Result7Aluminum 200mm • Energy Pi+ : N pi+ : N pi0 : probability(x10-4) • : 11000 : 19 : 17.27 +- 3.97 • : 7500 : 14 : 18.67 +- 4.99 N pi+ N pi0

  11. Result8Aluminum 250mm • Energy Pi+ : N pi+ : N pi0 : probability(x10-4) • : 11000 : 18 : 16.36 +- 3.86 • : 7500 : 10 : 13.33 +- 4.22 N pi+ N pi0

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