Guenther Rosner FAIR Design Study, PANDA 3, GSI, 19/1/06 1 PANDA3: Magnet design and integration of detectors Tasks & participants Progress Milestones

Guenther Rosner FAIR Design Study, PANDA 3, GSI, 19/1/06 2 Tasks & participants Cracow 1)Design of interface forward spectrometer 2)Integration of muon detectors into forward spectrometer 3)Mechanical design studies 4)Electronic control systems Dubna 1)Design and prototyping of superconducting coils and cryostats 2)Magnetic field and stress calculations 3)Magnet design 4)Design of control and protection system; power supply system Genova 1)Magnetic field calculation 2)Magnet design 3)Tests of superconducting cables 4)Cryogenic system verifications and test Glasgow 1)Project coordination 2)Magnetic field and raytrace calculations, stress calculations 3)Magnet design 4)Slow control systems 5)Integration of detector systems into solenoid GSI 1)Cryogenics 2)Magnet instrumentation 3)Design and Integration of internal targets 4)Intermediate region, vacuum, supply lines

Guenther Rosner FAIR Design Study, PANDA 3, GSI, 19/1/06 3 Original Dubna design

Guenther Rosner FAIR Design Study, PANDA 3, GSI, 19/1/06 4 Solenoid field B/B max (%) B/B (%)

Guenther Rosner FAIR Design Study, PANDA 3, GSI, 19/1/06 5 Transitional region solenoid-dipole

Guenther Rosner FAIR Design Study, PANDA 3, GSI, 19/1/06 6 Target and Forward Spectrometers: Top view

Guenther Rosner FAIR Design Study, PANDA 3, GSI, 19/1/06 7 Magnets: TOSCA 3D model Side Top Upstream

Guenther Rosner FAIR Design Study, PANDA 3, GSI, 19/1/06 8 Total field in horizontal mid-plane

Guenther Rosner FAIR Design Study, PANDA 3, GSI, 19/1/06 9 Total field in vertical mid-plane

Guenther Rosner FAIR Design Study, PANDA 3, GSI, 19/1/06 10 z x Z (longitudinal) component of field in horizontal mid-plane.

Guenther Rosner FAIR Design Study, PANDA 3, GSI, 19/1/06 11 z x Transverse (normal to Z) component of field in horizontal mid-plane.

Guenther Rosner FAIR Design Study, PANDA 3, GSI, 19/1/06 12 z yZ (longitudinal) component of field in vertical centre plane.

Guenther Rosner FAIR Design Study, PANDA 3, GSI, 19/1/06 13 z y Transverse (normal to Z) component of field in vertical centre-plane.

Guenther Rosner FAIR Design Study, PANDA 3, GSI, 19/1/06 14 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 15 Magnetic forces Solenoid

Guenther Rosner FAIR Design Study, PANDA 3, GSI, 19/1/06 16 Solenoid coil: stress & strain

Guenther Rosner FAIR Design Study, PANDA 3, GSI, 19/1/06 17 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 18 Axial forces on solenoid coil

Guenther Rosner FAIR Design Study, PANDA 3, GSI, 19/1/06 19 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 20 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 21 Milestones 10 th monthSuperconducting solenoid coil material selected 16 th month Magnetic field, raytrace and finite element stress calculations finished for Solenoid and Dipole 16 th month Design of superconducting parts of solenoid and dipole coils, cryostats finished 30 th month Tests of coil and cryostat prototypes for solenoid and dipole finished 33 rd monthConceptual design solenoid and dipole

Guenther Rosner FAIR Design Study, PANDA 3, GSI, 19/1/06 22 Deliverables Magnetic field and stress calculations Prototyping of coils and cryostats Design of magnet part of target access and integration of detectors into magnet system Technical Design Report