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RICH upgrade: layout, housing of the MaPMT, engineering (excluding the f/e electronics). Alessandro Petrolini on behalf of many collegues 16 maggio 2013
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RICH layout Configuration: a new RICH1 plus the current RICH2. Minimal changes are required to the current RICH1 to reduce the high-occupancy ( 30%) which would otherwise make pattern recognition very hard. A realistic option was developed, which fits into the current perceived constraints: longer focal length of the spherical mirror ( sqrt(2) to get ½ occupancy); move the PD plane, let it fit into the available space with minimal engineering changes; a perturbation on the current configuration, a safe and well-known scenario, easily extrapolated from construction and years of experience with the current RICH1. 16/05/20132Alessandro Petrolini - Dipartimento di Fisica dell’Università di Genova e INFN
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16/05/20133Alessandro Petrolini - Dipartimento di Fisica dell’Università di Genova e INFN
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16/05/20134Alessandro Petrolini - Dipartimento di Fisica dell’Università di Genova e INFN
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Optical performance Average incidence angle: 2.4 degrees. About 2.9mm-3.5mm pixel size and: RMS spot size: 1.11 mm +/- 0.03 mm Maximum spot size diameter: 3.3 mm. Beware: many details not optimized yet, first of all the geometrical acceptance. This is a very first exercise: a lot of studies are needed in order to understand all the aspects and details and look for improvements and a better optimization. But: it works and it is feasible. 16/05/20135Alessandro Petrolini - Dipartimento di Fisica dell’Università di Genova e INFN
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Current RICH1 16/05/20136Alessandro Petrolini - Dipartimento di Fisica dell’Università di Genova e INFN
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New Vertical RICH1 16/05/20137Alessandro Petrolini - Dipartimento di Fisica dell’Università di Genova e INFN
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Existing RICH1 [EDR] + R=3800mm 16/05/20138Alessandro Petrolini - Dipartimento di Fisica dell’Università di Genova e INFN
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45 cm Nominal focal plane of existing RICH1 [EDR] 58 cm Nominal PD-plane of the upgraded RICH1 Clearance: 10 cm 16/05/20139Alessandro Petrolini - Dipartimento di Fisica dell’Università di Genova e INFN
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Keep sealing to beam-pipe at the same position Move downstream the spherical mirror 2.50 m Photon Detectors + Electronics Area 0.5 m 16/05/201310Alessandro Petrolini - Dipartimento di Fisica dell’Università di Genova e INFN
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Minimal RICH1 modified Extensive re-use of existing parts: reduce costing, help with time-schedule, profit from past experience. Already good performance, which might improve with further optimization. About 1940 MaPMT are required for full coverage of the acceptance. 16/05/201311Alessandro Petrolini - Dipartimento di Fisica dell’Università di Genova e INFN
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Housing of the MaPMT Photo-Detector assembly Development of the housing for the MaPMT (Photo-Detector Assembly): modular solution, based on fully autonomous functional units: Elementary Cell (EC) := atomic fully functional assembly; Photo-Detector Module (PDM) (a suitable number of EC); Super-structure (mange groups of PDM with ease of access). Modular structure, easily adapted/scalable to different options. All these items have been INFN responsibility for LCHb (RICH2). Work started in 1998 (stopped in 2005 for the MaPMT option); it was resurrected now, with the choice of the MaPMT. A lot of work was already done ten years ago. GE, stretta collaborazione con MIB, FE e PD (+CERN e UK). 16/05/201312Alessandro Petrolini - Dipartimento di Fisica dell’Università di Genova e INFN
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Elementary Cell / Photo-Detector Module The base-board of the Elementary Cell tries to combine different functions together, including: mechanical supporting structure for the MAPMT and ancillary systems; electrical connections from/to the MAPMT: readout board, HV, DCS, aob. HV: voltage divider passive components; passive thermal dissipation capabilities; electrical insulation; magnetic shielding, if needed; optical adapter, if needed. A few elementary Cells make one Photo-Detector Module (PDM) 16/05/201313Alessandro Petrolini - Dipartimento di Fisica dell’Università di Genova e INFN
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Prototype of the EC 16/05/201314Alessandro Petrolini - Dipartimento di Fisica dell’Università di Genova e INFN
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Eight CLARO boards per 4 MaPMT 4 MaPMT + MS The Base-Board Digital boards Alu support Board2 PDM for 2 base-boards (2×(2×2)) MaPMT Only 4 MaPMT+MS shown, plus their CLARO boards, plus digital board and full housing for 8 MaPMT PDM: PRELIMINARY CAD ENGINEERING NOT TO SCALE – first protoypes do exist 16/05/201315Alessandro Petrolini - Dipartimento di Fisica dell’Università di Genova e INFN
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Digital boards Eight CLARO boards per 4 MaPMT Board2 PDM for 2 base-boards (2×(2×2)) MaPMT Only 4 MaPMT+MS shown, plus their CLARO boards, plus digital baord and full housing for 8 MaPMT Alu support 4 MaPMT + MS The Base-Board PDM: PRELIMINARY CAD ENGINEERING NOT TO SCALE – first protoypes do exist 16/05/201316Alessandro Petrolini - Dipartimento di Fisica dell’Università di Genova e INFN
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Super-structure for the MaPMT assembly Infrastructure for the photo-detector assembly (PD): Overall mechanics. Global Thermal and active cooling. Global Magnetic screening. Electro-optical cabling. Accessibility (to be improved for RICH1!) PD, stretta collaborazione con GE (e CERN). 16/05/201317Alessandro Petrolini - Dipartimento di Fisica dell’Università di Genova e INFN
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Short-Term plans Assemble a full PDM (including readout electronics) for lab testing. Understand the requirements for the super-structure; start design. 16/05/201318Alessandro Petrolini - Dipartimento di Fisica dell’Università di Genova e INFN
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SPARE
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21 >460mm CRANE TT support 16/05/2013 Alessandro Petrolini - Dipartimento di Fisica dell’Università di Genova e INFN
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