guenther rosner fair design study, panda 3, gsi, 19/1/06 1 panda3: magnet design and integration of...
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Guenther Rosner FAIR Design Study, PANDA 3, GSI, 19/1/06
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PANDA3: Magnet design and integration of detectors
Tasks & participants Progress Milestones
Guenther Rosner FAIR Design Study, PANDA 3, GSI, 19/1/06
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Tasks & participants
Cracow1) Design of interface forward spectrometer2) Integration of muon detectors into forward spectrometer3) Mechanical design studies4) Electronic control systems
Dubna1) Design and prototyping of superconducting coils and cryostats2) Magnetic field and stress calculations3) Magnet design4) Design of control and protection system; power supply system
Genova1) Magnetic field calculation2) Magnet design3) Tests of superconducting cables4) Cryogenic system verifications and test
Glasgow
1) Project coordination2) Magnetic field and raytrace calculations, stress calculations3) Magnet design4) Slow control systems5) Integration of detector systems into solenoid
GSI1) Cryogenics2) Magnet instrumentation3) Design and Integration of internal targets4) Intermediate region, vacuum, supply lines
Guenther Rosner FAIR Design Study, PANDA 3, GSI, 19/1/06
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Original Dubna design
Guenther Rosner FAIR Design Study, PANDA 3, GSI, 19/1/06
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Solenoid field
B/Bmax (%)B/B (%)
Guenther Rosner FAIR Design Study, PANDA 3, GSI, 19/1/06
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Transitional region solenoid-dipole
Guenther Rosner FAIR Design Study, PANDA 3, GSI, 19/1/06
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Target and Forward Spectrometers:Top view
Guenther Rosner FAIR Design Study, PANDA 3, GSI, 19/1/06
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Magnets:TOSCA 3D model
Side
Top
Upstream
Guenther Rosner FAIR Design Study, PANDA 3, GSI, 19/1/06
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Total field in vertical mid-plane
Guenther Rosner FAIR Design Study, PANDA 3, GSI, 19/1/06
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z
x
Transverse (normal to Z) component of field in horizontal mid-plane.
Guenther Rosner FAIR Design Study, PANDA 3, GSI, 19/1/06
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z
yTransverse (normal to Z) component of field in vertical centre-plane.
Guenther Rosner FAIR Design Study, PANDA 3, GSI, 19/1/06
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Solenoid coil design
Indirectly cooled coil with thermo-siphon 4.5K LHe circulation (Aleph, Delphi, BaBar, Kloe, Finuda, CMS)
Co-extruded aluminium stabilised (RRR>1000) Rutherford cable
Magnetic forces sustained by an high strength aluminium alloy mandrel (internal winding)
Intermediate temperature shields cooled by 60K Helium gas (nitrogen-free operation)
Guenther Rosner FAIR Design Study, PANDA 3, GSI, 19/1/06
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Magnetic forces Solenoid
Guenther Rosner FAIR Design Study, PANDA 3, GSI, 19/1/06
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Solenoid coil: stress & strain
Guenther Rosner FAIR Design Study, PANDA 3, GSI, 19/1/06
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Solenoid coil stress
Total stress on coil well below material limit
Stress on conductor at coil ends (high current region) exceeds plastic limit by about 20% for current ratio 1:2 Tolerable as demonstrated by Delphi and Aleph Can be healed by heating coil up
Guenther Rosner FAIR Design Study, PANDA 3, GSI, 19/1/06
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Axial forces on solenoid coil
Axial Reaction Force [Metric tons]
-400
-300
-200
-100
0
100
200
300
200 250 300 350 400 450 500 550 600 650 700
gap [mm]
forz
a [t
]
Guenther Rosner FAIR Design Study, PANDA 3, GSI, 19/1/06
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Axial forces
Quite high, 110 t, but in same direction Support structure needs to carry weight of
coil + axial magnetic force Axial support: 6 Ti rods, 1m long Thermal losses: only 1W per rod (6W in
total)
Guenther Rosner FAIR Design Study, PANDA 3, GSI, 19/1/06
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To do list 2006
Optimise superconducting solenoid magnetic design Thickness of field clamps
Inner muon detector barrel?
Freely accessible distance between solenoid and dipole (40cm?)
Enlarge dipole entrance, exit gap?
Optimise superconducting dipole magnetic design
Perform raytrace calculations for solenoid & dipole
Start detailed mechanical design solenoid & dipole
Guenther Rosner FAIR Design Study, PANDA 3, GSI, 19/1/06
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Milestones
10th month Superconducting solenoid coil material selected
16th monthMagnetic field, raytrace and finite element stress calculations finished for Solenoid and Dipole
16th monthDesign of superconducting parts of solenoid and dipole coils, cryostats finished
30th monthTests of coil and cryostat prototypes for solenoid and dipole finished
33rd month Conceptual design solenoid and dipole