SNuMI Transfer Line Magnets

1
SNuMI Transfer Line Magnets

• Vertical bend dipoles
• Horizontal bend dipoles
• Horizontal bend mirror dipoles
• Trim dipoles
• Main quadrupoles
• Trim quadrupoles
• 3Q120 quadrupoles

2
Vertical bend dipoles (ADCW)

• Injection line 4 each
• Extraction line 2 each
• Spare 1 each
• Rebuild old 8 GeV line dipoles with 3/4 spacer
  in back leg to open gap

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Issues

• Can we find all seven original magnets?
• Ramp to make heat load acceptable
• Is lamination insulation still good enough for
  ramping?
• Do we need to reinsulate the coils for long-term
  reliability?
• Will leakage field require shielding the Recycler?

5
Horizontal dipoles (PDD)

• Injection line 5 each
• Build more to design of permanent magnet dipoles
  in MI-8

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Issues

• Existing design, tooling, procedures
• Havent built any for 10 years
• Measurement system on last legs
• Need funding at start of FY08

8
Horizontal bend mirror dipoles

• Injection line 1 each
• MI-8 1 each
• New design permanent magnet

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Issues

• Conceptual design does not meet strength specs
• Work needed to meet field uniformity needs
• Should share tooling with PDD
• Need funding at start of FY08

11
Trim dipoles (various)

• Reuse magnets from RR ? MI lines

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13
Issues

• None

14
Main quadrupoles

• Injection line 10 each
• Extraction line 10 each
• Reconfigured RR30 straight 16 each
• Retrim/rebuild permanent quads from RR30 straight
  (44 available)

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Issues

• Higher strength required than regularly achieved
  in the past
• Try choosing best ferrite bricks
• Trim quads available
• Tight time schedule for during shutdown
• Re-establish procedure soon
• Dress rehearsal in months before shutdown

17
Trim quadrupoles

• One for each permanent quadrupole in the
  injection line matching section
• Main Ring trim quadrupoles
• Excess spares

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Issues

• None

20
3Q120 quadrupoles for NuMI

• Primary proton beam 5 each
• Spare 1 each
• Build new, low inductance, water cooled magnets
  to Main Injector design

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Issues

• Need funding at start of FY08