Dipole First A Large Bore 15T Magnet

1
US LHC Accelerator Research Program
bnl - fnal- lbnl - slac
Dipole First A Large Bore 15T Magnet S.
Caspi, P. Ferracin, R. Hafalia, R.
Hinkins Lawrence Berkeley National
Laboratory Napa October 2004
2
A large bore dipole is another option for an open
mid-plane design.
3
Dipole First

• Nb3Sn Technology
• Large bore 130mm diameter
• 15T
• Keys and bladder assembly
• 150MPa pre-stress no pole separation

4
Dipole Cross-section
130mm bore 1.9m structure
5
Coils Sub-Assembly
6
Coil and Structure
7
End Plate
8
Final Assembly
9
Field
B at 15T
10
Coil Azimuthal Stress
Azimuthal Stress at 15T
Azimuthal Stress at 4.2K
11
Mid-plane Stress
   
Mid-plane stress and no pole gaps
     
12
Conclusions
A large bore dipole is another option for an open
mid-plane design. The large bore is needed to
reduce and remove the heat load to the
coils. Nb3Sn technology can be applied today
towards a cosine-theta configuration of a 130mm
bore, high field (15T) dipole for a Dipole First
option.