Central Tracker Support Frame MEC Session, CM June 2017 at GSI J

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Presentation transcript:

Central Tracker Support Frame MEC Session, CM June 2017 at GSI J Central Tracker Support Frame MEC Session, CM June 2017 at GSI J. Lühning, GSI Routing of cables & tubes from MVD & STT to upstream racks “Shuttle” comprising MVD, STT, CSF, target cross CT-shuttle without support for upstream components CT-shuttle with easily removable support Deflection of CT-shuttle with removable support Splitting of D150 vacuum tube Extension of CT-beams Suspension of beam tube when BE-EMC is moving

Routing of cables & tubes from MVD & STT to upstream racks At the MEC Workshop in April, 2015, Dario Orecchini presented two options for routing STT cables & tubes to the racks on the aux-platform: the loop (festoon) option, elegant and comfortable but requires a lot of space the patch-panel option, cumbersome Unfortunately we don’t have enough space for loop(s) so only patch panels seem feasible. At the CM in December 2016, Artur Cebulla (FZ Jülich) presented a tentative routing. A boundary condition: in z-direction, between any patch panel and the magnet doors, we have to provide at least 80 cm free space. Patch panels might be hung to beams which rest on top of the upstream racks.

“Shuttle” consisting of MVD, STT, CSF. , target cross, cables “Shuttle” consisting of MVD, STT, CSF*, target cross, cables * Central Tracker Support Frame IP z As Tommaso Quagli pointed out at the CM in December 2016: it is necessary to do an FEM analysis of the central tracker (STT+MVD) support. Weight / [kg] Centre-of-Gravity z(IP) / [cm] STT, MVD, & CSF without cables 150 ? -24 ? upstream vacuum tube with attached MVD supplies 100 ? -170 ? STT cables & supplies ?

CT-shuttle without support for upstream components IP z support shell(s) for D150 vacuum tube without additional support for the upstream components the target cross would be overloaded.

CT-shuttle with easily removable support tension screw (M5 would be sufficient) holding less than 1000N A relatively simple way to relieve the target cross: to install temporarily an aluminium support like the red one shown above. weight of the support less than 10 kg hangs in pick-ups at the CSF placed only within the space reserved for the BE-EMC

Deflection of CT-shuttle with removable support target cross relieved Enlargement factor of the deflection shown above: 100 notable (intentional) deflection of the removable support hardly any deflection of the vacuum components no notable loads on the target cross anymore

Splitting of D150 vacuum tube Some time ago the beamline was split at z= -120 cm . Certainly there was a reason. Is there still?

Extension of CT-beams upstream end of CT-beams ? How far upstream might the CT-beams end? The barrel-DIRC doesn’t seem to be a limitation anymore.

Suspension of beam tube when BE-EMC is moving tension rod Suspension with tension rod feasible? If at all, an aperture in the support cone of the BE-EMC would be necessary.

Thank you for your attention!