Solenoid magnetIron structure Update

1
Jun. 22, 05
Solenoid magnet/Iron structure Update
KEK Hiroshi Yamaoka
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In the previous meeting,
Air gap10cm
lt2mm
8 layers
Iron
7 layers
lt20mm
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Superconducting Solenoid
Superconductor
2 layers coil Same current density
Uniformity2mm, Air gap10cm
(For ATLAS)
NbTiCuAl 10.915.6 Strand diameter 1.23mm
Filament diameter 20mm Jc in NbTi at 5T, 4.2K
gt 2750A/mm2 Ic at 5T, 4.2K gt 20300A
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Tesla
How in GLD solenoid?
Tesla Technical Design Report PART IV A Detector
for TESLA March 2001 Editors T.Benke,
S.Bertolucci, R.D.Heuer, R.Settles
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Calculations
Coil-L
R4.0m
4.25m
Coil-M
Coil-C
Jcorr/Jmain

• To satisfy field homogeneities in TPC volume,
  this value must be at least less then 0.3.

Hopeless...
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Coil-L
Coil-M
Coil-C
R4.0m
dz
4.25m
io
Added!
Chosen!!
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A. Unif.lt2mm, No correction Coil
A. Unif.lt2mm, With correction Coil
8 layers
6 layers
-0.6mm
2mm
B. Unif.lt20mm, No correction Coil
Iron
7 layers
18mm
Air gap10cm
8
Magnetic Field/Flux lines
Magnetic Field in the TPC
Leakage Field along the beam line
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Conclusion
Moun
Iron Yoke
EM-Cal
Solenoid
H-Cal
Main track
Solenoid Magnet
50cm
t50mm
2 layers
2 layers
4 layers

• - 2 layers coil 4 layers coil(L500mm at both
  ends).
• - Same current density.
• Power supply for the correction coil is not
  necessary.