PD Solenoid Cryostat Update

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PD Solenoid Cryostat Update

• T. Page
• 03/09/2006

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Topics

• Cryostat design
• Helium line connections
• Cryostat types
• HTS leads
• Status and schedule of tasks

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Solenoid Magnet Cryostat

• Solenoid length (final)
• Iron length 126 mm
• Helium vessel length 150 mm
• Cryostat length
• Vacuum vessel 210 mm.
• Flange to flange (installed) 270 mm.

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Solenoid Cryostat Design
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Cryostat x-section, front view
Helium line.
(Helium supply and nitrogen lines not shown.)
Space reserved for HTS leads.
REMOVED.
Cooldown line.
Vacuum relief.
Instrumentation ports.
Thermal shield (80K).
Support post.
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Cryostat side views
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Cryostat Sketch
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Helium line connections

• Main helium line will use Tevatron bellows
  assembly Conoseal flanges with metal seals.
  Have 300 in stock, will use 25.
• Helium supply and LN2 lines will be the same
  flanges as the 2? in the Tevatron (metal seals).
• Vacuum flange will be either a V-band style like
  the Tevatron or a ISO LF banded-clamp, both use
  o-rings.

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Solenoid Types (configurations)

• There will need to be 4 types (configurations) of
  solenoid cryostats due to the increase in
  focusing period length along the linac.
• Type 1 4 MEBT Sol. 1, 2, 3 16 total 8
• Type 2 Sol. 4, 5, 6 7 total 4
• Type 3 Sol. 8, 9, 10 11 total 4
• Type 4 Sol. 12, 13, 14 15 total 4
• Each type has a set range of center to center
  install lengths. The total range for each type
  is 50 mm.

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Solenoid Types

• The center to center ranges are as follows
• Type 1 install length from 500 550 mm
• Type 2 install length from 563 613 mm
• Type 3 install length from 625 675 mm
• Type 4 install length from 688 738 mm
• A spacer will be needed between the solenoids on
  either side of the chopper since this length is
  980 mm c-c.

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FNAL HTS Leads

• It was decided to design and build the upper
  copper section at FNAL and have a vendor supply
  and integrate the lower HTS section.
• Working with Sandor to design the upper end.
• Plan is to fabricate and test the upper section
  at FNAL. Parts are on order and are due March
  10, 2006. There are brazing and welding steps
  that need to be done at FNAL after receiving all
  of the components.

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FNAL HTS Leads

• Parameters / details
• 300 Amp lead
• Upper copper section conduction cooled only.
• Requires 13 W heat exchanger at 80 K.
• Copper rod approximately 0.25 inch diameter x 364
  mm long.
• Able to use standard Varian medium current
  feedthrough for warm end connection (rated for
  use at -200C). This is exactly a 0.25 inch
  diameter copper rod with a ceramic insulator
  above the flange.

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FNAL HTS Leads

• A critical component in this design is the helium
  seal between the HTS section and the helium
  vessel pipe. This seal needs to provide a leak
  tight cold joint (80K) and also electrically
  isolate the HTS section from the helium vessel.
• Procured two standard ceramic feedthroughs from
  Insulator Seal. These have been put through
  three thermal cycles and have not failed. I
  plan on doing many more thermal cycles over the
  next couple of months.

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HTS lead schematic
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HTS lead heat exchanger
Hx SAgt30,000 mm2
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HTS lead test setup
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HTS lead test setup
Varian lead
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RT Solenoids status and schedule

• Solenoid cryostat design
• Conceptual design WIP, need 3 months to
  complete
• Have nearly final solenoid design
• Need HTS lead design
• 4 configurations due to increasing focusing
  period
• Detailed design (Simmie) 6-9 months
• Support post details are complete, not released
• HTS leads
• Test should be done by April 2006
• Design work to integrate lower HTS section 6
  months
• Fabrication by vendor 6-12 months (just a
  guess!)
• Need to start discussions with vendor(s)

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RT Solenoids status and schedule

• Linac machine layout
• WIP. Integrate components / changes as they
  become available.
• RT solenoid cryogenic feed return cans
• This task has not been started.
• If done by us, need 6 months to design (with
  help from AD)
• Possibly have AD Cryo do complete design?