SHMS Q1

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SHMS Q1

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Q1 Specifications

• SHMS2006L Tune
• Pole Radius 0.25 m
• Aperture Radius 0.20 m
• Gradient 8.98 T/m
• Effective Field Length 2.14 m

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Cold Mass Assembly

• SHMS Q1 copy of HMS Q1 with the following
  exceptions
• EFL 2.151m vs. 1.889m
• SC cable 36 strand Rutherford Cable vs.
  Stabilized Cable
• of conductor stacks/coil 1 vs. 4
• Thicker Fe leg
• No correction coils

Helium Can outer shell
Pole Radius 25 cm
Warm Bore Ø 40.2 cm
Helium Can inner shell
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Three Dimensional Views
Notch for Beamline
Cold Mass Assembly
Current Lead Egress
Average Turn Length 4.95 m Total Cable length
1.59 Km
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Side View
Tie Bolts x4
Yoke length 2.03m
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Cross Section View One Quadrant
Yoke Material 1006Yoke Weight 12,855
lbsConductor Weight 336 lbsMagnet Weight 20
tons
Helium Cooling channels
Iron Yoke
Added Iron to Leg
Coil Stacks
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Close up of the conductor stack
80 Turns / stack
Kapton
B-Stage
Yoke
SC Cable
Midplane
1.51mm
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Top view of coil support structure For HMS Q1
Many of the components needed will be cloned from
the HMS Q1
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Q1 Current Parameters

• NI (total) 1,019,866 A.turns
• Total Turns 320
• Current 3,187.1 Amps
• Critical Current Margin 4,659 Amps
• Stored Energy 0.628 MJ
• Inductance 123.7 mH

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Q1 Magnetic Model Summary

• Field Gradient G 9.095 T/m
• Integral G 19.56 (T/m).m
• EFL 2.151 m

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Tosca Results
Current Density 18,100 A.T/cm2
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Field in Iron
Tesla
Average Field in Yoke 2.3 T
Highest fields along edges4.61 T
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Central Field Gradient Plot
Gradient T/m
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Gradient Quality out to R0.20 m
Quality
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Midplane Gradient Map
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Gradient Plot
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Excitation Curve
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Multipole Harmonics
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Harmonics Excitation
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Stray Field Along Beam Line
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Stray Field Bender and Q1
BendersStray Field
Integral By.dz 0.56 T.m
Q1s Stray Field
Units Gauss.Cm
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Coil Forces
Peak Field in Coil is 2.7 T
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Quadrant Yoke forces
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FEA Model Loads
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Von Mises Stress
Units PSI
Unit Psi
Max Stress is 6 Ksi
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Deflection
Units Inches
DeflectionInches
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Tie Bar Stress316S 36mm Diameter RodMJ36x2-4h6h
ThreadsDesign Stress 300 MPa 43.5Ksi (1/3
of Ultimate)

• HMS Q1
• Squeeze Load 10.44 Ksi
• EM Force 20.74 Ksi
• Total Stress 31.18 Ksi

• SHMS Q1
• Squeeze Load 10.44 Ksi
• EM Force 35.53 Ksi
• Total Stress 45.97 Ksi

Squeeze Load is that needed to achieve a packing
factor 96 for the Laminations. From Tesla.
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Next Steps for Q1 Magnet Development

• Trial windings of Coil. Biggest issue for the
  HMS magnets
• Preparing Conductor De-Keystoning.
• Review RD report validating structural integrity
  given longer length and higher forces.

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Conclusion

• Tosca model demonstrates that the longer and
  higher gradient Q1 design meets the magnetic
  specifications.