Storage Ring Sextupole Magnets
Drawings
Sextupole Magnets Coil Assembly
Sextupole Magnets - AS1, AS2, AS3, BS1,
BS2 Magnet Final Assembly
Tables
- Design Specification Parameters of the Storage Ring Sextupole Magnet
- Goals and Major Parameters for Storage Ring Sextupole Magnet
- Calculated Details of the Design Parameters for the Storage Ring Sextupole Magnet at 7.7 GeV
Design Specification Parameters
of the Storage Ring Sextupole Magnet
Sextupoles | ||
Number | 280 | |
Magnetic length | 0.24 | m |
Max. gradient | 405 | T/m2 |
Beam stay clear - Horizontal | ±35.0 | mm |
- Vertical | ±20.0 | mm |
Goals and Major Parameters
for Storage Ring Sextupole Magnet
Number required | 280 | |
Strength at 7.0 GeV | 405 | T/m2 |
Effective length | 0.241 | m |
Gap height or diameter | 98 | mm |
Total mass of magnet | 314* | kg |
Coils per pole | 1 | |
Conductor - Height | 7.4 | mm |
- Width | 5.0 | mm |
- Hole diameter | 3.0 | mm |
Number of turns per pole | 42 | |
Total inductance | 28 | mH |
Total resistance | 110 | mW |
Time constant | 254 | ms |
Peak current | 161 | A |
Current density in coil | 3.1 | A/mm2 |
Voltage | 17.3 | V |
Power | 2.8 | kW |
Cooling water circuits per magnet | 6 | |
Total water flow | 1.3 | gpm |
Water pressure drop | 80 | psi |
Water temperature rise | 9 | °C |
*Calculated from computer model
Calculated Details of the Design Parameters
for the Storage Ring Sextupole Magnet at 7.7 GeV
Calculations derived using program MADEST.
Number of magnets | 280 | |
Type of magnet | Sextupole | |
Type of excitation | DC | |
Maximum multipole field gradient | 445 | T/m2 |
DESIGN AND OPERATING PARAMETERS OF A SINGLE MAGNET:
Gap |
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Effective length of field along gap axis | 24.1 | cm | |
Total width of pol | 4.38 | cm | |
Total bore radius | 4.9 | cm | |
Core |
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Distance from - Field edge to - Core end | 1.55 | cm | |
- Pole side | -.30 | cm | |
- Coil to - Pole face | 3.288 | cm | |
- Pole side | -0.8 | cm | |
- Top yoke | -.08 | cm | |
- Side yoke | .32 | cm | |
- Endplate end | 2.22 | cm | |
Pole radius | 2.768 | cm | |
Angle of pole | 1.82 | rad | |
Angle between pole axis and pole side | .052 | rad | |
Maixmum field at pole edge | 0.9 | T | |
Maximum field inside yoke | 1.36 | T | |
Overall core - Height | 64.8 | cm | |
- Width | 70.0 | cm | |
- Length (Magnetic steel ONLY) | 21 | cm | |
Total mass of magnetic core | 243* | kg | |
Lamination thickness | .15 | cm | |
Lamination stacking method | Parallel |
Coil |
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Conductor material | Copper | ||
Conductor - Height | .742 | cm | |
- Width | .498 | cm | |
- Hole diameter | .297 | cm | |
- Corner radius | .13 | cm | |
Conductor min. bend radius (inside edge) | |||
- Height | 2.0 | cm | |
- Width | 1.9 | cm | |
Insulation - Tape - Thickness - Turn | .0191 | cm | |
- Ground | .0178 | cm | |
- Width - Turn | 2.5 | cm | |
- Ground | 2.5 | cm | |
Insulation total thickness - Turn | .0191 | cm | |
- Ground | .107 | cm | |
Allowance between layers of conductor | .076 | cm | |
Allowance between rows of conductor | .025 | cm | |
Average turn length | 66.4 | cm | |
Magnetic efficiency | 93.3 | % | |
Ampere-turns per pole | 7443 | At | |
Number of layers of conductors per pole | 13 | ||
Number of conductors per layer per pole | 4 | ||
Effective number of turns per magnet | 252 | ||
Number of turns per cooling circuit | 42 | ||
Number parallel connected conductors per magnet | 1 |
Coil - Height | 11.26 | cm | |
- Width | 2.43 | cm |
Electrical | ||
Stored energy | 435 | J |
Total inductance | 28 | mH |
Total coil resistance | 108 | mW |
Maximum supply current | 177 | A |
Voltage across magnet | 19.1 | V |
Overall magnet - Height | 75.9 | cm |
- Width | 71.1 | cm |
- Length | 30.5 | cm |
Total mass of an assembled magnet | 314* | kg |
OPERATING PARAMETERS OF THE MAGNET SYSTEM:
Cooling circuit | ||
Coolant supply temperature | 32* | C |
Coolant temperature gradient | 10.4 | C |
Pressure gradient | 80 | psi |
Coolant flow | 34.7 | gpm |
Power losses | ||
Electrical losses in magnets | 949 | kW |
Electrical power to operate coolant pumps | 17 | kW |
SOME AUXILIARY PARAMETERS FOR THIS DESIGN ARE:
Inside radius of core | 20.6 | cm |
Cross-sectional area of core | 1605* | cm2 |
Cross-sectional area of conductor | .29 | cm2 |
Current density in conductor | 620 | A/cm2 |
Current density in coil | 336 | A/cm2 |
Reynold's number | 8005 | |
Coolant flow velocity | 188 | cm/s |
Maximum conductor temperature | 42.8 | °C |
*Calculated from computer model