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Simulating the MICE target

Simulating the MICE target. M. Apollonio, A. Dobbs - IC. Motivations:. Optimise secondary production minimising dangerous losses in ISIS Assess better orientation/shape of the shaft for secondary production A work at “four hands”:

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Simulating the MICE target

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  1. Simulating the MICE target M. Apollonio, A. Dobbs - IC MICE Target Workshop - IC

  2. Motivations: • Optimise secondary production minimising dangerous losses in ISIS • Assess better orientation/shape of the shaft for secondary production • A work at “four hands”: • A. Dobbs, ORBIT simulation of ISIS ring/interaction with target/comparison with taken data from MICE shifts, • MA, G4Beamline simulation of secondary production with a set of shafts. MICE Target Workshop - IC

  3. G4Beamline Studies MICE Target Workshop - IC

  4. Q1-TGT axis Z X 25 deg 10 mm 10 mm B A A 25 deg rotation & propagation to plane B LONG SLIM secondaries production 20<theta<30 propagation to plane A acos(Pz/Ptot)>20 && acos(Pz/Ptot)<30 to Q1 lost C shift & align with Q1-TGT axis

  5. 25 deg 25 deg FAT SHORT TILTED TGT 10o / 25o MICE Target Workshop - IC

  6. Materials: Ti Be Al 25 deg Cylinder: OD=6mm/ID=4.7 mm MICE Target Workshop - IC

  7. Tgt_long_slim_rot0: y:x Nprimaries=100M A MICE Target Workshop - IC

  8. Tgt_long_slim: y:x rotation 25 deg + shift 4.226 B MICE Target Workshop - IC

  9. at Q1 planein Q1 bore C MICE Target Workshop - IC

  10. Tgt_tilt25_rot0: y:x Nprimaries=10M A MICE Target Workshop - IC

  11. C At Q1 planeQ1 bore MICE Target Workshop - IC

  12. Tgt_short_fat_rot0: y:x MICE Target Workshop - IC

  13. Tgt_cyl_rot0: y:x MICE Target Workshop - IC

  14. MICE Target Workshop - IC

  15. MICE Target Workshop - IC

  16. MICE Target Workshop - IC

  17. ORBIT Results Summary Adam Dobbs 1st Nov 2008 MICE Target Workshop - IC

  18. Abstract An overview is presented of the results obtained from simulating beam loss in the ISIS synchrotron, using the ORBIT programme. Particluar reference is made to loss caused by the MICE target. Results for three target orientations are presented (“Long-Thin”, “Short-Fat” and parallel to the MICE beamline). Two target sizes are used, 10mm by 1mm and 1mm by 1mm. Dip depths ranging from 27mm to 24mm above beam axis are shown. MICE Target Workshop - IC 25/11/08 ORBIT Results, Adam Dobbs 18

  19. Target Orientations Target setups: • “Long-Thin” – 10mm along z – axis, 1mm along x – axis (true orientation) • “Short-Fat” – 1mm along z – axis, 10mm along x - axis • “Reduced” – 1mm along z – axis, 1mm along x - axis MICE Target Workshop - IC 25/11/08 ORBIT Results, Adam Dobbs 19

  20. ORBIT phys.models Elastic/inelastic/nuclear Model The MICE target is modelled as a block of iron inserted into the ISIS beam 2ms before extraction, sitting at a position of ~115m around the synchrotron ring. The target is also currently modelled as being static. Work is being done about the possibility of improving the model to make the target titanium and dynamic. MICE Target Workshop - IC 25/11/08 ORBIT Results, Adam Dobbs 20

  21. TGT MICE Target Workshop - IC

  22. Results The simulation results are represented as a series of 2D histograms. They show the number of particles lost from the beam as a function of the time in an ISIS spill and the position in the synchrotron in which they were lost. Further a table is also presented for each target configuration, showing the number of “hits” (intersections of the volume) in the MICE target, for the last 2ms of the ISIS spill. The tables also give the number of particles “absorbed” by the target i.e. turned into lost particles by their interaction with the target. MICE Target Workshop - IC 25/11/08 ORBIT Results, Adam Dobbs 22

  23. Short-Fat: 27mm above axis, -1 to 10ms Injection losses MICE target losses MICE target losses MICE Target Workshop - IC 25/11/08 ORBIT Results, Adam Dobbs 23

  24. Short-Fat: 27mm above axis, 8 to 10ms MICE Target Workshop - IC 25/11/08 ORBIT Results, Adam Dobbs 24

  25. MICE Target Workshop - IC 25/11/08 ORBIT Results, Adam Dobbs 25

  26. Long-Thin: 27mm above axis, -1 to 10ms (NB: present config) MICE Target Workshop - IC 25/11/08 ORBIT Results, Adam Dobbs 26

  27. Long-Thin: 27mm above axis, 8 to 10ms MICE Target Workshop - IC 25/11/08 ORBIT Results, Adam Dobbs 27

  28. MICE Target Workshop - IC 25/11/08 ORBIT Results, Adam Dobbs 28

  29. Long-Thin: 26mm above axis, -1 to 10ms MICE Target Workshop - IC 25/11/08 ORBIT Results, Adam Dobbs 29

  30. Long-Thin: 26mm above axis, 8 to 10ms MICE Target Workshop - IC 25/11/08 ORBIT Results, Adam Dobbs 30

  31. MICE Target Workshop - IC 25/11/08 ORBIT Results, Adam Dobbs 31

  32. Long-Thin: 27mm above axis, 250 rotation, -1 to 10ms MICE Target Workshop - IC 25/11/08 ORBIT Results, Adam Dobbs 32

  33. Long-Thin: 27mm above axis, 250 rotation, 8 to 10ms NB At present there remains an ambiguity in the direction of the rotation, clockwise or anti-clockwise. If / when this is resolved it will be published in an updated version of this document. MICE Target Workshop - IC 25/11/08 ORBIT Results, Adam Dobbs 33

  34. MICE Target Workshop - IC 25/11/08 ORBIT Results, Adam Dobbs 34

  35. Reduced: 27mm above axis, -1 to 10ms MICE Target Workshop - IC 25/11/08 ORBIT Results, Adam Dobbs 35

  36. Reduced (1mm^2): 27mm above axis, 8 to 10ms MICE Target Workshop - IC 25/11/08 ORBIT Results, Adam Dobbs 36

  37. MICE Target Workshop - IC 25/11/08 ORBIT Results, Adam Dobbs 37

  38. Reduced: 26mm above axis, 8 to 10ms MICE Target Workshop - IC 25/11/08 ORBIT Results, Adam Dobbs 38

  39. MICE Target Workshop - IC 25/11/08 ORBIT Results, Adam Dobbs 39

  40. Reduced: 25mm above axis, 8 to 10ms MICE Target Workshop - IC 25/11/08 ORBIT Results, Adam Dobbs 40

  41. MICE Target Workshop - IC 25/11/08 ORBIT Results, Adam Dobbs 41

  42. Reduced: 24mm above axis, 8 to 10ms MICE Target Workshop - IC 25/11/08 ORBIT Results, Adam Dobbs 42

  43. MICE Target Workshop - IC 25/11/08 ORBIT Results, Adam Dobbs 43

  44. Circular-solid 6mm radius: 27mm above axis, 8 to 10ms MICE Target Workshop - IC

  45. MICE Target Workshop - IC

  46. SUMMARY of the SUMMARIES MICE Target Workshop - IC

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