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Time stamping for Emulsion Tracks with Gyaku Data Base method

Time stamping for Emulsion Tracks with Gyaku Data Base method. 070122 Y.Nonoyama. Introduction. Last autumn, I showed the GyakuDataBase method in meeting @ Matsumoto. Now, I’m developing. I try time stamping systematically. So, I’m looking for good separation parameter.

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Time stamping for Emulsion Tracks with Gyaku Data Base method

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  1. Time stamping for Emulsion Tracks with Gyaku Data Base method 070122 Y.Nonoyama

  2. Introduction • Last autumn, I showed the GyakuDataBase method in meeting @ Matsumoto. • Now, I’m developing. • I try time stamping systematically. • So, I’m looking for good separation parameter. • Today, I show a part of it.

  3. Gyaku Data Base • Emulsion track extension down stream. • Look for SFT hits on the Emul track ?? no match beam allowance match Emulsion track match match SFT = 10layer (x,y-projection), 2layer (u-projection) Allowance : +- (1mm + 3mrad * z axis) SFT plane alignment + angle measurement error (and scattering error)

  4. Sample 1 : BL040 No x-ray

  5. BL040 PL1-2 8 x 7 cm2 SUTS scan Alignment in MINOS hall Alignment in Transportation

  6. Alignment in Transportation Alignment in MINOS hall

  7. BL040 PL1-2 After virtual erase

  8. BL040 PL1-2 Peak 2 Peak 1

  9. BL040 PL1-2 Peak 1 Peak 2

  10. SFT matching (903 tracks) Using SFT reconstructed tracks Residual from nominal dx vs dy

  11. After alignment between ECC with SFT rad mm dx dqx mm rad dy dqy

  12. Select Scan Back tracks with GyakuDataBase • I selected 165tracks matching with SFT trigger. I thought these are from Interaction. • Checked again and selected good match 31tracks with SFT trigger from them. • And, best matched tracks are 20 in 31tracks. • 13 are Rock Muon type. • 7 are Interaction type.

  13. How decide best match ? • Important point, there is SFT hits directory below plane of ECC target. • If matching is real, SFT hits exist far 1~2 fibers . • Also It’s same low momentum particle. Because no material between ECC target to directory below SFT plane. point

  14. y x x y 2 3 Residual of Emulsion track to hits ofdirectory below plane • This showed residual. • extension emulsion track to • below SFT plane. • Select tracks matching with SFT trigger as Rock Muon type by eyes. mm mm mm mm If matching is real, its residual will be into 500mm.

  15. 31tracks scan back result

  16. 79 0.0, 0.1 -0.3

  17. 108 0.2 -0.3

  18. 572 -0.4 0.3, 0.4

  19. 573 -0.3 0.3

  20. 623 -0.1, -0.6 -0.2

  21. 694 0.4, -0.4 0.0, -0.1

  22. 281 -0.4 1.1 penetrate

  23. 818 -1.0 0.2 penetrate

  24. Sample2 : BF021 * x-ray

  25. Select scan back track like BL040 and Scan back result

  26. 0.0, 0.4 0.2, -0.2

  27. -0.3, 0.1 0.3, 0.1

  28. PL 43 I.P. 1.5mm

  29. summary • Now looking for good separation parameter. • One is below SFT plane hits. • This selection power is very good. • Bud SFT link efficiency is effected by SFT efficiency. • So, other selection parameter will be needed for efficiency.

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