Muon collider ring dipole status of magnetic mechanical analysis alexander zlobin
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Muon Collider Ring Dipole: Status of Magnetic & Mechanical Analysis Alexander Zlobin PowerPoint PPT Presentation


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Muon Collider Ring Dipole: Status of Magnetic & Mechanical Analysis Alexander Zlobin. MC Ring Magnet Requirements. Nominal field: 10 T Operation temperature: 4.5 K Operation margin: 10%+ (will know better from modeling) Aperture: ID~20 mm Midplane gap: ~20 mm on one side

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Muon Collider Ring Dipole: Status of Magnetic & Mechanical Analysis Alexander Zlobin

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Muon collider ring dipole status of magnetic mechanical analysis alexander zlobin

Muon Collider Ring Dipole:Status of Magnetic & Mechanical AnalysisAlexander Zlobin


Mc ring magnet requirements

MC Ring Magnet Requirements

  • Nominal field: 10 T

  • Operation temperature: 4.5 K

  • Operation margin: 10%+ (will know better from modeling)

  • Aperture: ID~20 mm

  • Midplane gap: ~20 mm on one side

  • Field quality: dB/B~10^-4 Rref=10 mm

  • Short ends

  • Magnet length: ?


Mc ring dipole shell type coil

MC Ring Dipole: Shell-type coil

  • Original magnetic design (VadimKashikhin):

  • 2 double-layer shell-type coils with spacers

  • Good field quality in the aperture ~50mm

  • Bop~10T with ~15% margin at 4.5K.

  • Midplane gap: 20 mm


Mechanical design concept

Mechanical Design Concept

  • Compact cold mass with Aluminum shell

  • Warm iron yoke

  • 10 mm Al support spacer in the gap

  • Absorber outside the cold mass at 77K or 300 K


Mechanical analysis

Mechanical Analysis

Igor Novitski

  • Large structure deformations, gaps

  • Large coil deformations and stress concentrations

  • Problems with stress management with shell-type coils

  • Iron yoke support

  • Coil midplane support

    Optimization of this approach needs more work

Stress and deformations


Mc ring dipole block type coil

MC Ring Dipole: Block-type coil

Cold iron yoke

RFe=125 mm, mu=2

  • 2 double-pancake coils with stress management, cold yoke

  • Aperture/open gap =20 mm

  • Good field quality 40mmx20mm

  • Bnom=10 T with ~10% margin at 4.5 K


Field distribution

Field Distribution

  • Bmax_coil=13.37 T (block #1)

  • Bmax_ap=11.24 T

  • Operation margin ~12%


Mechanical design

Mechanical Design

  • Cold yoke with vertical split

  • Holes for absorber inside cold mass

  • SS shell


Mechanical analysis1

Mechanical Analysis

Igor Novitski

Structure deformation


Coil stress and deformation

Coil Stress and Deformation

Igor Novitski

Coil stress

Coil deformation


Next steps

Next Steps

  • Continue mechanical and magnetic design optimization

    • Include coil pre-stress and cool-down

    • Reduce coil deformations and stress

    • Increase operation margin

  • Coil cooling and quench protection concepts

  • Prepare for engineering design and modeling

  • Field quality requirements

  • Effect of mid-plane support (size, position, material) on coil heating and cryogenic load


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