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March 26, 2009, CERN

On the possibilities of observation of proton volume deflection from different crystal planes in one crystal. V incenzo Guidi, A ndrea Mazzolari, INFN, Ferrara Victor Tikhomirov RINP, Minsk. March 26, 2009, CERN. Outline

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March 26, 2009, CERN

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  1. On the possibilities of observation of proton volume deflection from different crystal planes in one crystal Vincenzo Guidi, Andrea Mazzolari, INFN, Ferrara Victor Tikhomirov RINP, Minsk March 26, 2009, CERN

  2. Outline The idea of multiple volume reflection possibility by crystal axesin a single crystal PNPI conditions VR experiment simulations MVR predictions IHEP conditions VR experiment simulations MVR predictions SPS H8 conditions VR experiment simulations MVR predictions Optimal condition of MVR observation

  3. Volume Reflection prediction A.M.Taratin and S.A.Vorobiev, Phys. Lett. A119 (1987) 425 and A.M.Taratin and S.A.Vorobiev, NIM B26 (1987) 512

  4. Volume reflection by crystal axes V.V. Tikhomirov, PLB 655(2007)217 Axes formmany inclined reflecting planes

  5. Protons are reflected from many crystal plane sets of one crystal

  6. Reflection from many crystal planes increase VR angle 4 times (LHC case) V.V. Tikhomirov, PLB 655(2007)217 The approach ofV.A. Maisheev, Phys. Rev. ST Accel. Beams 10:084701,2007 was used.

  7. Both the IHEP , PNPI and CERN experiments on VR observation and MVR by different crystal planes of one crystal are simulated below considering particle scattering by crystal axes

  8. MVR of 1 GeV protons

  9. Comparison of MVR and VR of 1 GeV protons

  10. IHEP, 70 GeV; VR experiment and MVR

  11. SPS experiment, 400 GeV VR:

  12. 400 GeV; MVR simulations

  13. 400 GeV, comparison ofSPS VR experiment and MVR simulations

  14. MVR efficiency dependence on proton incidence direction E=400GeV, lcr=4mm, Rb=10m The angular deflection efficiency dependence is week The ratio looks close to optimal one

  15. Optimal lcr values The optimal l values are lcr=2.5 - 4mm

  16. Optimal Rb values The optimal Rbvalues are Rb=7-12m

  17. Optimal conditions of MVR observation at the SPS look like: lcr = 2.5 - 4mm, Rb= 7 - 12m,

  18. VR experiment and MVR simulations,

  19. Thank you for attention!

  20. The Mir castle

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