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Genova, Dec. 2019
Present design
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SPY@DND December 2020 update Andrea Bersani Present design Genova, - - PowerPoint PPT Presentation
SPY@DND December 2020 update Andrea Bersani Present design Genova, - - PowerPoint PPT Presentation
SPY@DND December 2020 update Andrea Bersani Present design Genova, Dec. 2019 2 With some number The overall width is 8150 mm A 200 mm muon filter is integrated in the yoke to reduce the overall weight and material surrounding the MPD we
SLIDE 2
SLIDE 3
Genova, Dec. 2019
With some number
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The overall width is 8150 mm A 200 mm muon filter is integrated in the yoke
to reduce the overall weight and material surrounding the MPD we propose to use iron
There is still ~600 mm available (wall to wall) Yoke weight: 650 t
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Genova, Dec. 2019
Possible cold mass suspension
The coil shell will be reasonably built in segments The tie rods will be attached to the cryostat external shell
due to the asymmetry in the iron, an uneven hoop stress arises: the radial suspension is critical
No residual axial force is foreseen
longitudinal tie rods design is postponed
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SLIDE 5
Genova, Dec. 2019
Present magnetic model
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SLIDE 6
Genova, Dec. 2019
Present magnetic model
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SLIDE 7
Genova, Dec. 2019
Magnetic features summary
Stray field in the plane of the coil: 0.01 T at 8.5 m from the magnet centre Stray field along the coil axis: 0.01 T at 12.5 m from the magnet centre Current density: < 35 A/mm2 Maximum field on cable: 1 T Field in the TPC: 0.46 - 0.57 T
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SLIDE 8
Genova, Dec. 2019
Next steps
Mechanical analysis of the cold mass is starting
hoop stress weight radial suspension next steps: axial suspension, misalignments, cool-down
Cryostat design is starting
we asked for Don's support we will check availability of INFN Genova engineering availability
Separating parts to cope with shaft size Cable definition
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