Magnets Technologies for NOA Transfer Line

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Magnets Technologies for NO?A Transfer Line(
RR30 section)

• April 21, 2008

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Magnet Count Summary
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Where are they coming from?

• Existing magnets available from tunnel or storage
• MGS, RQNx (re-measure, re-trim)
• New construction of existing designs
• PDD
• New constructions of modified designs
• MLAW, PDDW
• Modification of existing magnets
• ADCW
• New construction of new design
• PDS

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Permanent Magnet Quadrupoles (RQN)

• Modification of existing RQMs
• Need 48 including spares 48 are available
• Issues to be addressed
• It will be necessary to re-trim and re-measure
  all
• RD will occur with spare magnets for trimming,
  measuring, and even brick magnetization (dress
  rehearsal)
• The RD effort on the 1st one is being used to
  get us back in the permanent magnet business

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PDS

• Why a new dipole?
• Need to fit a dipole in an area with small beam
  separation
• Build a magnet with SmCo5 (stronger) instead of
  Strontium Ferrite
• Issues
• New design
• Industry will build a small prototype. From this
  we will establish the design parameters of the
  final magnet

Injection Line
V2 (PDD)
PDS
To Recycler
847
848
849
MI8
8 Gev line
Vertical switching magnet
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PDSPreliminary Design

• Many different designs considered
• Separation of only6.25 between MI-8 and RRInj
  beam centers
• Must have 2x4 aperture for beam pipe.
• 2.167kG vs 2.312kG
• Need field shaping

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PDS
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PDD

• Injection line requires 5 new magnets
• Existing design, tooling, procedures and
  measurement
• Not used for 10 years
• Needs refurbishment

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PDD
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PDDW

• Modification to PDD dipoles
• 10 of the ferrite bricks (and the corresponding
  compensator) will be replaced with aluminum
  blocks (and strips).
• Will require more tuning than the PDD dipoles.
• Sufficient strontium ferrite bricks and
  compensator material exists.

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MGS

• One in the tunnel and one in storage
• Will need to be measured

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ADCW

• Vertical Bend Dipoles (ADCW)
• Injection line 1 each
• Extraction line 2 each
• Rebuild old 8GeV line dipole with 3/4 spacer
  in back leg to open gap.
• More than enough magnets have been found.
• Due to changes in beamline design, heat load and
  field leakage issues are no longer a concern.
• For a 33mr bend will run at lt700 Amps

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ADCW
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ADCW Modeling

• For 33mr the magnet needs to run 670 Amps
• ADC has run in this range.
• An unmodified ADC will be measured first

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ADCW Modeling
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MLAW
With a modified MLA

• Rotated/Modified Lambertson
• 5-6 mm gap increase will increase the current
  requirements by14 over the smaller aperture
• The required bend, however, will be 14mr (40 of
  current bend)
• The new Lambertson will need to run 430Amps
  (currently runs at 950Amps)

Solid lines 6s Dashed lines 10s
Injected beam (downstream/RR beampipe end)
Circulating Beam
Injected Beam (upstream/Lambertson end)
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MLAW

• Two (2) MLAW Lambertson magnets, one for the
  Recycler injection line and one for the RRMI30
  transfer line will be fabricated
• These will be a modified version of the magnet
  currently used for injection from MI-8 to the
  Main Injector.

Spacers to increase
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MLA Measurements

• In the range we will be running the Lambertson,
  (430A) the field strength is linear
• MLA002 has had stretched wire measurements of
  strength and field shape

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Conclusions

• No new groundbreaking work will occur. Most
  work consists of modifications of existing
  magnets or new fabrication of magnets which are
  either existing designs or modifications to
  existing designs (MLAW, PDDM, and PDDW) .
• RD work will occur to refresh forgotten
  permanent magnet knowledge
• Fabrication of magnets with SmCo5 can be tricky,
  but industry has experience with them. Testing a
  prototype will allow us to finalize a production
  design