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Multi Beamlett Extraction Experiments and Sector Magnet Field Investigation

Multi Beamlett Extraction Experiments and Sector Magnet Field Investigation. Platform DC Power Supply. Platform Ground. 35kV. Pulsed Extract Power Supply. 17kV. -. +. Laboratory Ground. 18kV. Extraction Electrode, Coldbox and Analysing Magnet all Pulsed. -. +. 35keV H - Beam.

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Multi Beamlett Extraction Experiments and Sector Magnet Field Investigation

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  1. Multi Beamlett Extraction Experiments and Sector Magnet Field Investigation

  2. Platform DC Power Supply Platform Ground 35kV Pulsed Extract Power Supply 17kV - + Laboratory Ground 18kV Extraction Electrode, Coldbox and Analysing Magnet all Pulsed - + 35keV H- Beam Post Extraction Acceleration Gap

  3. Profile Measurements for Different Extraction Voltages

  4. mA/cm2 2.5 2.0 1.5 1.0 0.5 0.0 17 kV Extraction Voltage 35 kV Platform Voltage 18 kV Post Acceleration Voltage 47 mA Beam Current 355 mm downstream from ground plane of post acceleration gap

  5. mA/cm2 2.5 2.0 1.5 1.0 0.5 0.0 16 kV Extraction Voltage 35 kV Platform Voltage 19 kV Post Acceleration Voltage 42 mA Beam Current 355 mm downstream from ground plane of post acceleration gap

  6. mA/cm2 2.5 2.0 1.5 1.0 0.5 0.0 15 kV Extraction Voltage 35 kV Platform Voltage 20 kV Post Acceleration Voltage 40 mA Beam Current 355 mm downstream from ground plane of post acceleration gap

  7. mA/cm2 2.5 2.0 1.5 1.0 0.5 0.0 14 kV Extraction Voltage 35 kV Platform Voltage 21 kV Post Acceleration Voltage 38 mA Beam Current 355 mm downstream from ground plane of post acceleration gap

  8. mA/cm2 2.5 2.0 1.5 1.0 0.5 0.0 13 kV Extraction Voltage 35 kV Platform Voltage 22 kV Post Acceleration Voltage 35 mA Beam Current 355 mm downstream from ground plane of post acceleration gap

  9. mA/cm2 2.5 2.0 1.5 1.0 0.5 0.0 12 kV Extraction Voltage 35 kV Platform Voltage 23 kV Post Acceleration Voltage 32 mA Beam Current 355 mm downstream from ground plane of post acceleration gap

  10. mA/cm2 2.5 2.0 1.5 1.0 0.5 0.0 11 kV Extraction Voltage 35 kV Platform Voltage 24 kV Post Acceleration Voltage 28 mA Beam Current 355 mm downstream from ground plane of post acceleration gap

  11. mA/cm2 2.5 2.0 1.5 1.0 0.5 0.0 10 kV Extraction Voltage 35 kV Platform Voltage 25 kV Post Acceleration Voltage 25 mA Beam Current 355 mm downstream from ground plane of post acceleration gap

  12. mA/cm2 2.5 2.0 1.5 1.0 0.5 0.0 9 kV Extraction Voltage 35 kV Platform Voltage 26 kV Post Acceleration Voltage 21 mA Beam Current 355 mm downstream from ground plane of post acceleration gap

  13. mA/cm2 2.5 2.0 1.5 1.0 0.5 0.0 8 kV Extraction Voltage 35 kV Platform Voltage 27 kV Post Acceleration Voltage 17 mA Beam Current 355 mm downstream from ground plane of post acceleration gap

  14. mA/cm2 2.5 2.0 1.5 1.0 0.5 0.0 7 kV Extraction Voltage 35 kV Platform Voltage 28 kV Post Acceleration Voltage 13 mA Beam Current 355 mm downstream from ground plane of post acceleration gap

  15. mA/cm2 2.5 2.0 1.5 1.0 0.5 0.0 6.5 kV Extraction Voltage 35 kV Platform Voltage 28.5 kV Post Acceleration Voltage 12 mA Beam Current 355 mm downstream from ground plane of post acceleration gap

  16. mA/cm2 2.5 2.0 1.5 1.0 0.5 0.0 6 kV Extraction Voltage 35 kV Platform Voltage 29 kV Post Acceleration Voltage 10 mA Beam Current 355 mm downstream from ground plane of post acceleration gap

  17. mA/cm2 2.5 2.0 1.5 1.0 0.5 0.0 5.5 kV Extraction Voltage 35 kV Platform Voltage 28.5 kV Post Acceleration Voltage 9 mA Beam Current 355 mm downstream from ground plane of post acceleration gap

  18. mA/cm2 2.5 2.0 1.5 1.0 0.5 0.0 17 kV Extraction Voltage 35 kV Platform Voltage 18 kV Post Acceleration Voltage 47 mA Beam Current 355 mm downstream from ground plane of post acceleration gap

  19. 100 x ‘(mRads) 50 0 -50 -100 -60 -30 0 30 -60 x (mm) The Present Situation 17 kV Extract Potential 47 mA Beam Current 100 50 y ‘(mRads) 0 -50 -100 -60 -30 0 30 -60 y (mm) 0.84 πmm-mRad norm rms 0.92 πmm-mRad norm rms

  20. 5 4 3 2 1 Cs Cs H2 Multi Beamlett Extraction Position of Caesium and Hydrogen dispensing holes Hole Index To study beam transport aperture plates with 5 separate 1 mm diameter holes have been constructed.

  21. VARY EXTRACTION VOLTAGE

  22. HOLE 1 HOLE 2 HOLE 3 HOLE 4 HOLE 5 ALL 5 6 kV Extraction Voltage 355 mm downstream from ground plane of post acceleration gap 18 kV Post Acceleration Voltage

  23. HOLE 1 HOLE 2 HOLE 3 HOLE 4 HOLE 5 ALL 5 7 kV Extraction Voltage 355 mm downstream from ground plane of post acceleration gap 18 kV Post Acceleration Voltage

  24. HOLE 1 HOLE 2 HOLE 3 HOLE 4 HOLE 5 ALL 5 8 kV Extraction Voltage 355 mm downstream from ground plane of post acceleration gap 18 kV Post Acceleration Voltage

  25. HOLE 1 HOLE 2 HOLE 3 HOLE 4 HOLE 5 ALL 5 9 kV Extraction Voltage 355 mm downstream from ground plane of post acceleration gap 18 kV Post Acceleration Voltage

  26. HOLE 1 HOLE 2 HOLE 3 HOLE 4 HOLE 5 ALL 5 10 kV Extraction Voltage 355 mm downstream from ground plane of post acceleration gap 18 kV Post Acceleration Voltage

  27. HOLE 1 HOLE 2 HOLE 3 HOLE 4 HOLE 5 ALL 5 11 kV Extraction Voltage 355 mm downstream from ground plane of post acceleration gap 18 kV Post Acceleration Voltage

  28. HOLE 1 HOLE 2 HOLE 3 HOLE 4 HOLE 5 ALL 5 12 kV Extraction Voltage 355 mm downstream from ground plane of post acceleration gap 18 kV Post Acceleration Voltage

  29. HOLE 1 HOLE 2 HOLE 3 HOLE 4 HOLE 5 ALL 5 13 kV Extraction Voltage 355 mm downstream from ground plane of post acceleration gap 18 kV Post Acceleration Voltage

  30. HOLE 1 HOLE 2 HOLE 3 HOLE 4 HOLE 5 ALL 5 14 kV Extraction Voltage 355 mm downstream from ground plane of post acceleration gap 18 kV Post Acceleration Voltage

  31. HOLE 1 HOLE 2 HOLE 3 HOLE 4 HOLE 5 ALL 5 15 kV Extraction Voltage 355 mm downstream from ground plane of post acceleration gap 18 kV Post Acceleration Voltage

  32. HOLE 1 HOLE 2 HOLE 3 HOLE 4 HOLE 5 ALL 5 16 kV Extraction Voltage 355 mm downstream from ground plane of post acceleration gap 18 kV Post Acceleration Voltage

  33. HOLE 1 HOLE 2 HOLE 3 HOLE 4 HOLE 5 ALL 5 17 kV Extraction Voltage 355 mm downstream from ground plane of post acceleration gap 18 kV Post Acceleration Voltage

  34. H2 Cs Cs 5 4 3 2 1 Beam Current Variation with Extraction Voltage

  35. θ r B r = 55 mm B r = 105 mm Mapping the Field H2 Cs Cs 5 4 3 2 1

  36. Sector Magnet Field

  37. Angle (Degrees) Magnetic Field

  38. Angle (Degrees) Field Index

  39. Overall Field Index

  40. H2 Cs Cs 5 4 3 2 1 Sector Magnet Modifications

  41. H2 Cs Cs 5 4 3 2 1 Sector Magnet Modifications

  42. H2 Cs Cs 5 4 3 2 1 Sector Magnet Modifications

  43. Sector Magnet Modifications H2 Cs Cs 5 4 3 2 1

  44. VARY POST ACCELERATION VOLTAGE

  45. HOLE 1 HOLE 2 HOLE 3 HOLE 4 HOLE 5 ALL 5 23 kV Post Acceleration Voltage 355 mm downstream from ground plane of post acceleration gap 7 kV Extraction Voltage

  46. HOLE 1 HOLE 2 HOLE 4 HOLE 5 ALL 5 25 kV Post Acceleration Voltage 355 mm downstream from ground plane of post acceleration gap 7 kV Extraction Voltage

  47. HOLE 1 HOLE 2 HOLE 4 HOLE 5 ALL 5 26 kV Post Acceleration Voltage 355 mm downstream from ground plane of post acceleration gap 7 kV Extraction Voltage

  48. HOLE 1 HOLE 2 HOLE 4 HOLE 5 ALL 5 27 kV Post Acceleration Voltage 355 mm downstream from ground plane of post acceleration gap 7 kV Extraction Voltage

  49. HOLE 1 HOLE 2 HOLE 4 HOLE 5 ALL 5 28 kV Post Acceleration Voltage 355 mm downstream from ground plane of post acceleration gap 7 kV Extraction Voltage

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