tom lord dune prism meeting 9 th january 2020 oa distance
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Beam Options for DUNE-Prism Tom Lord DUNE Prism Meeting 9 th January 2020 OA Distance Reduction? Can the OA distance required be for reduced with a few extra HC fluxes? Can we remove requirement for middle-distance OA measurements?


  1. Beam Options for DUNE-Prism Tom Lord DUNE Prism Meeting 9 th January 2020

  2. OA Distance Reduction? • Can the OA distance required be for reduced with a few extra HC fluxes? • Can we remove requirement for middle-distance OA measurements? – say just ~30m + on-axis? 2 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  3. Up to 27.25 – Prism Only 3 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  4. Up to 25.25 – Prism Only 4 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  5. Up to 25.25 – BeamPrism 5 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  6. Up to 23.25 – Prism Only 6 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  7. Up to 23.25 – BeamPrism 7 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  8. Up to 23.25 - BeamPrism 8 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  9. Up to 21.25m OA – BeamPrism 9 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  10. Up to 20.5m OA – PRISM only 10 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  11. Up to 20.5m OA - BeamPrism Additional Beams • ABC: - 200kA on-axis, - 330kA on-axis, • BC: - 310kA 16.5- 20.5m OA - 330kA 16.5- 20.5m OA 11 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  12. Up to 18.5m OA – PRISM only 12 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  13. Up to 18.5m OA - BeamPrism Additional Beams • AC: - 250kA on-axis • ABC: - 200kA on-axis, - 200kA 2.5m- 6.5m OA • BC: - 293kA on-axis - 293kA 6.5m- 10.5m OA 13 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  14. No Mid OA positions • Can we remove requirement for middle-distance OA measurements? – say just ~30m + on-axis? 14 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  15. No Mid 4m 20.25-23.75 15 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  16. nomid4m 28-32m OA 16 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  17. nomid4m 28-32m OA 17 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  18. nomid4m 30.25-33.75 18 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  19. Nomid 7m 21.25-27.75 19 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  20. Nomid 7m 23.25-29.75 20 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  21. Nomid 7m 17.25-23.75 21 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  22. Shape tests 22 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  23. KS Test & Degeneracies Clearly plenty of degeneracies in the flux space Even more degeneracies in the solutions.. • Want to directly quantify some aspects of this degeneracy: - how the shape & position of these distributions varies 23 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  24. Nominal vs Nominal Further off-axis Further off-axis 24 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  25. KS Test & Degeneracies 25 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  26. Closest Flux Up To Xm OA BC ABC AC AB A 26 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  27. Expanding Beam Options 27 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  28. On-axis HC fluxes 28 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  29. Lower Momentum Beams • May be possible to run lower momentum proton beam to the target • Main Injector cycles faster for lower momentum beams → relative flux intensity isn’t as bad • Operate same set of horn configurations 29 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  30. Lower Energy Beams – 30 GeV • 30 GeV with 2x scaling to account for increased MI cycle 30 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  31. Lower Energy Beams – 8 GeV • 8 GeV with 3.75x scaling to account for increased MI cycle 31 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  32. Lower Energy Beams – 8 GeV – 5x relative scaling • 8 GeV with 20x scaling 32 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  33. Thank you 33 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  34. Backup Slides 34 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  35. On-axis HC fluxes 35 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  36. On-axis HC fluxes 36 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  37. Initial Approach • Feed in all HC fluxes on & off- axis then reduce down to “best” coefficients • Fit quality depends on number of allowed additional fluxes • Also on relative HC regularisation parameter • Also on off-axis flux binning • Also on how additional number of fluxes are reduced 37 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  38. Fit Method • Solve using Tikhonov regularisation - We want satisfying - If is invertible, then - Add regularisation with a tuneable penalty matrix, , where or similar - Then minimize - The solution to this is 38 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  39. On-axis HC fluxes Normed wrt 293kA 39 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  40. Compressed Sensing Solves Blue: ND at 293kA Orange : 250kA – 200kA (unweighted) 40 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  41. Nominal vs A Further off-axis Further off-axis 41 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  42. Nominal vs AB Further off-axis Further off-axis 42 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  43. Nominal vs AC Further off-axis Further off-axis 43 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  44. Nominal vs ABC Further off-axis Further off-axis 44 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

  45. Nominal vs BC Further off-axis Further off-axis 45 1/9/2020 Tom Lord | Beam Options for DUNE-Prism

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