1. Multi Beamlett Extraction Experiments and Sector Magnet Field Investigation

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

3. Profile Measurements for Different Extraction Voltages

4. 2.5 mA/cm 2 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. 2.5 mA/cm 2 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. 2.5 mA/cm 2 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. 2.5 mA/cm 2 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. 2.5 mA/cm 2 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. 2.5 mA/cm 2 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. 2.5 mA/cm 2 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. 2.5 mA/cm 2 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. 2.5 mA/cm 2 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. 2.5 mA/cm 2 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. 2.5 mA/cm 2 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. 2.5 mA/cm 2 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. 2.5 mA/cm 2 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. 2.5 mA/cm 2 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. 2.5 mA/cm 2 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. 17 kV Extract Potential -60 0-3030 0 50 100 -50 -100 x (mm) x (mRads) -60 0-3030 0 50 10 0 -50 - 10 0 y (mm) y (mRads) 0.84 πmm-mRad norm rms 0.92 πmm-mRad norm rms 47 mA Beam Current The Present Situation

20. Multi Beamlett Extraction 12345 H2H2 Cs To study beam transport aperture plates with 5 separate 1 mm diameter holes have been constructed. Position of Caesium and Hydrogen dispensing holes Hole Index

21. VARY EXTRACTION VOLTAGE

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

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

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

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

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

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

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

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

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

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

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

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

34. 5 H2 Cs 4321 Beam Current Variation with Extraction Voltage

35. Mapping the Field 5 H2H2 Cs 4321 θ r r = 105 mm r = 55 mm B B

36. Sector Magnet Field

37. Angle (Degrees) Magnetic Field

38. Angle (Degrees) Field Index

39. Overall Field Index

40. Sector Magnet Modifications 5 H2 Cs 4321

41. Sector Magnet Modifications 5 H2 Cs 4321

42. Sector Magnet Modifications 5 H2 Cs 4321

43. Sector Magnet Modifications 5 H2 Cs 4321

45. VARY POST ACCELERATION VOLTAGE

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

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

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

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

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

51. HOLE 1HOLE 2 HOLE 4HOLE 5ALL 5 355 mm downstream from ground plane of post acceleration gap 29 kV Post Acceleration Voltage 7 kV Extraction Voltage

52. HOLE 1HOLE 2 HOLE 4HOLE 5ALL 5 355 mm downstream from ground plane of post acceleration gap 30 kV Post Acceleration Voltage 7 kV Extraction Voltage

53. HOLE 1HOLE 2 HOLE 4HOLE 5ALL 5 355 mm downstream from ground plane of post acceleration gap 31 kV Post Acceleration Voltage 7 kV Extraction Voltage

54. HOLE 1HOLE 2 HOLE 4HOLE 5ALL 5 355 mm downstream from ground plane of post acceleration gap 32 kV Post Acceleration Voltage 7 kV Extraction Voltage

55. HOLE 1HOLE 2 HOLE 4HOLE 5ALL 5 355 mm downstream from ground plane of post acceleration gap 33 kV Post Acceleration Voltage 7 kV Extraction Voltage

56. VARY SECTOR MAGNET CURRENT

57. HOLE1 5.5 A Sector Magnet Current HOLE 1HOLE 2HOLE 3 HOLE 4HOLE 5ALL 5 355 mm downstream from ground plane of post acceleration gap 7 kV Extraction Voltage 28 kV Post Acceleration Voltage

58. HOLE 1HOLE 2HOLE 3 HOLE 4HOLE 5ALL 5 6.0 A Sector Magnet Current 355 mm downstream from ground plane of post acceleration gap 7 kV Extraction Voltage 28 kV Post Acceleration Voltage

59. HOLE 1HOLE 2HOLE 3 HOLE 4HOLE 5ALL 5 6.5 A Sector Magnet Current 355 mm downstream from ground plane of post acceleration gap 7 kV Extraction Voltage 28 kV Post Acceleration Voltage

60. HOLE 1HOLE 2HOLE 3 HOLE 4HOLE 5ALL 5 355 mm downstream from ground plane of post acceleration gap 7.0 A Sector Magnet Current 7 kV Extraction Voltage 28 kV Post Acceleration Voltage

61. HOLE 1HOLE 2HOLE 3 HOLE 4HOLE 5ALL 5 7.5 A Sector Magnet Current 355 mm downstream from ground plane of post acceleration gap 7 kV Extraction Voltage 28 kV Post Acceleration Voltage

62. HOLE 1HOLE 2HOLE 3 HOLE 4HOLE 5ALL 5 8.0 A Sector Magnet Current 355 mm downstream from ground plane of post acceleration gap 7 kV Extraction Voltage 28 kV Post Acceleration Voltage

63. VARY SCINTILATOR POSITION

64. HOLE 3 ALL 5 355 mm downstream from ground plane of post acceleration gap 8 kV Extraction Voltage 27 kV Post Acceleration Voltage

65. HOLE 3 ALL 5 405 mm downstream from ground plane of post acceleration gap 8 kV Extraction Voltage 27 kV Post Acceleration Voltage

66. HOLE 3 ALL 5 455 mm downstream from ground plane of post acceleration gap 8 kV Extraction Voltage 27 kV Post Acceleration Voltage

67. HOLE 3 ALL 5 505 mm downstream from ground plane of post acceleration gap 8 kV Extraction Voltage 27 kV Post Acceleration Voltage

68. HOLE 3 ALL 5 555 mm downstream from ground plane of post acceleration gap 8 kV Extraction Voltage 27 kV Post Acceleration Voltage

69. HOLE 3 ALL 5 605 mm downstream from ground plane of post acceleration gap 8 kV Extraction Voltage 27 kV Post Acceleration Voltage

70. HOLE 3 ALL 5 655 mm downstream from ground plane of post acceleration gap 8 kV Extraction Voltage 27 kV Post Acceleration Voltage

71. HOLE 3 ALL 5 705 mm downstream from ground plane of post acceleration gap 8 kV Extraction Voltage 27 kV Post Acceleration Voltage

72. HOLE 3 ALL 5 755 mm downstream from ground plane of post acceleration gap 8 kV Extraction Voltage 27 kV Post Acceleration Voltage

74. 0 μs

75. 10 μs

76. 20 μs

77. 30 μs

78. 40 μs

79. 50 μs

80. 60 μs

81. 70 μs

82. 80 μs

83. 90 μs

84. 100 μs

85. 110 μs

86. 120 μs

87. 130 μs

88. 140 μs

89. 150 μs

90. 160 μs

91. 170 μs

92. 180 μs

93. 190 μs

94. 200 μs

95. 210 μs

96. 220 μs

113. Cause of the cobra head 5 H2 Cs 4321 Hydrogen causing the meniscus to blow out?

114. 2.5 mA/cm 2 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 SLIT

115. 2.5 mA/cm 2 2.0 1.5 1.0 0.5 0.0 10 kV Extraction Voltage 35 kV Platform Voltage 25 kV Post Acceleration Voltage 5.8 mA Beam Current HOLE

116. Additional VARY EXTRACT ELECTRODE GAP

117. = 10 mm Post Ac. Gap / 1.1 mm Ext. Jaws = 10 mm Post Ac. Gap / 2.1 mm Ext. Jaws = 55 mm Post Ac. Gap / 2.1 mm Ext. Jaws

118. 2.1 mm ext elec new PAE level with em scanners

119. 1.1 mm ext elec new PAE level with em scanners

120. 2.1 mm ext elec new PAE level with em scanners

121. 1.1 mm ext elec new PAE level with em scanners

122. 2.1 mm ext elec new PAE level with em scanners

123. 1.1 mm ext elec new PAE level with em scanners

124. Integrated Light output for different extract jaw gaps