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MoEDAL LS1 Installation Plans

Richard Soluk – University of Alberta. MoEDAL LS1 Installation Plans. The LHCb VELO Region. Deployed Detectors – LT-NTDs. Each Low Threshold Nuclear Track Detector consists of multiple layers of CR39 and polycarbonate in a stack with guide dowels to ensure alignment.

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MoEDAL LS1 Installation Plans

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  1. Richard Soluk – University of Alberta MoEDAL LS1 Installation Plans

  2. The LHCb VELO Region R. Soluk --- University of Alberta --- MoEDAL Collaboration Meeting --- CERN June 19-21

  3. Deployed Detectors – LT-NTDs • Each Low Threshold Nuclear Track Detector consists of multiple layers of CR39 and polycarbonate in a stack with guide dowels to ensure alignment. • Stacks are sealed in aluminized mylar bags until ready for etching R. Soluk --- University of Alberta --- MoEDAL Collaboration Meeting --- CERN June 19-21

  4. LT-NTD Mounting • Stacks (typically 6) are placed in aluminum trays and mounted on rails attached to concrete walls around the VELO area • Bar codes used to identify each stack • First 3 prototype trays installed November 2009 R. Soluk --- University of Alberta --- MoEDAL Collaboration Meeting --- CERN June 19-21

  5. Current LT-NTD Array R. Soluk --- University of Alberta --- MoEDAL Collaboration Meeting --- CERN June 19-21

  6. Deployed Detectors - MMT • The Magnetic Monopole Trapper consists of a mass of aluminum • A magnetically charged particle that ranges out in the aluminum will be detectable by a magnetometer • Prototype consisted of 1” diameter aluminum rods located in front of the VELO below the beampipe R. Soluk --- University of Alberta --- MoEDAL Collaboration Meeting --- CERN June 19-21

  7. MMT Prototype R. Soluk --- University of Alberta --- MoEDAL Collaboration Meeting --- CERN June 19-21

  8. Deployed Detectors - Timepix • Only active element • 256x256 pixel solid state detector • 14x14mm active area R. Soluk --- University of Alberta --- MoEDAL Collaboration Meeting --- CERN June 19-21

  9. Timepix • One in forward direction near beamline other transverse to the IP R. Soluk --- University of Alberta --- MoEDAL Collaboration Meeting --- CERN June 19-21

  10. New MMT Location • Located under the VELO within the VELO support stand framework R. Soluk --- University of Alberta --- MoEDAL Collaboration Meeting --- CERN June 19-21

  11. New MMT Design • Square aluminum bars • Bars held in flat trays similar to those used for the LT-NTD stacks • 2.54 x 2.54 x 19cm bars • 12 rows of 3 bars per row • Approximately 12kg/tray • 6 trays per layer • 8 vertical layers • Mass of bars 576kg R. Soluk --- University of Alberta --- MoEDAL Collaboration Meeting --- CERN June 19-21

  12. MMT Supports • MMT not supported off the VELO frame but directly off the floor using aluminum blocks • Floor grid placed on top of blocks to form base for MMT R. Soluk --- University of Alberta --- MoEDAL Collaboration Meeting --- CERN June 19-21

  13. LT-NTD Upgrade • All plastic was removed at the end of run 1 • Will be replaced with new CR39/Makrofol stacks • New CR39 vendor identified since old production line no longer exists R. Soluk --- University of Alberta --- MoEDAL Collaboration Meeting --- CERN June 19-21

  14. New LT-NTD Locations • Top of VELO cover • Closest possible location to IP • Avoids having to install on ceiling using scaffold • 30 stacks • Underneath VELO on top of the new MMT • Further from IP due to pumps • 12 stacks R. Soluk --- University of Alberta --- MoEDAL Collaboration Meeting --- CERN June 19-21

  15. New Detector: HCC-NTD • Thin low mass detectors for highly ionizing particles • 3 layers of 150μm Makrofol inside a 25μm aluminum foil bag • 0.19% of a radiation length thickness • Can be taped to surfaces using kapton tape R. Soluk --- University of Alberta --- MoEDAL Collaboration Meeting --- CERN June 19-21

  16. HCC-NTD on the Trigger Tracker • Propose placing a HCC-NTD on the downstream surface of the TT • Adds ≈0.5% to the LHCb material budget to that point • Inside the LHCb acceptance but after the VELO, RICH1 and TT measurements R. Soluk --- University of Alberta --- MoEDAL Collaboration Meeting --- CERN June 19-21

  17. Additional Timepix • Cables will be installed now for 5 additional timepix • Routing is same as current timepix cables and does not conflict with LHCb cable runs R. Soluk --- University of Alberta --- MoEDAL Collaboration Meeting --- CERN June 19-21

  18. Installation Schedule R. Soluk --- University of Alberta --- MoEDAL Collaboration Meeting --- CERN June 19-21

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