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MICE Collaboration meeting at LBNL: 9 ~13 th Feb, 2005 Force reaction analysis Stephanie Yang Feb 10 th, 2005.

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Presentation on theme: "MICE Collaboration meeting at LBNL: 9 ~13 th Feb, 2005 Force reaction analysis Stephanie Yang Feb 10 th, 2005."— Presentation transcript:

1 MICE Collaboration meeting at LBNL: 9 ~13 th Feb, 2005 Force reaction analysis Stephanie Yang Feb 10 th, 2005

2 Estimate the module displacement and force reactions under the unbalance magnetic forces. FEA modelling of the super module. The FEA model consists of 3 AFC and 2 RFCC modules. Connecting bolts are modelled between the AFC module and RFCC module Objectives Magnetic force profile on 7 different cases were generated by Yury. All those cases have been studied and their results are summarized.

3 Case No. Forces (MN) AFC 1RFCC 1AFC 2RFCC 2AFC 3 1-0.088-0.21400.2140.088 20.0370.1860-0.186-0.037 30-0.21100.2110 4-0.3980000.398 50.312-0.31300.313-0.312 6-0.0840.095-0.31300.401 7-0.0878-0.22130.00090.3057-0.3121 Force profile received from Yury in January 2005

4 MICE cooling channel FEA model with the loading and boundary conditions Case 1:Forces (in MN) for Flip mode, Stage 6, p=240 MeV/c, β=42cm

5 Case 1: FEA result Max displacement: 0.114mm Max stress: 37MPa Max reaction force in Y direction at the support base is 44548 N

6 Case No.Max stress MPa Max displacement mm Max horizontal reaction force N Max vertical reaction force N 1 370.1142914844548 2 280.0752158833201 3 260.0632067231797 4 890.2913700555633 5 700.16437479213 6 880.286683346302 7 690.225069885550 FEA result summary

7 Sensitivity study has also carried out to exam whether there is any impact by opening a big access hole on each side of the RF support plate. Max displacement: 0.138mm Max stress: 45MPa The FEA results show that the max displacement is increased from 0.114mm to 0.138mm, and the max stress is increased from 37MPa to 45 MPa. Sensitivity Study Case

8 Conclusion The reaction forces on the support base of the Cooling channel indicates that: The majority of the horizontal reaction forces are being absorbed by the RFCC supports. The loads on AFC is passed through the connecting vessel flanges to the adjacent RFCC shell, rather than through its own support legs. We believe, there is no need to transmit the magnet forces from the Cooling Channel directly to the tracker solenoid as the super module (3 AFC modules & 2 Coupling Coil modules) are more than capable of sustaining the forces without any excessive sway. The support legs have to be strong enough to minimize the module movement due to the magnetic forces.


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