1. RICH upgrade: layout, housing of the MaPMT, engineering (excluding the f/e electronics). Alessandro Petrolini on behalf of many collegues 16 maggio 2013

2. 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

3. 16/05/20133Alessandro Petrolini - Dipartimento di Fisica dell’Università di Genova e INFN

4. 16/05/20134Alessandro Petrolini - Dipartimento di Fisica dell’Università di Genova e INFN

5. 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

6. Current RICH1 16/05/20136Alessandro Petrolini - Dipartimento di Fisica dell’Università di Genova e INFN

7. New Vertical RICH1 16/05/20137Alessandro Petrolini - Dipartimento di Fisica dell’Università di Genova e INFN

8. Existing RICH1 [EDR] + R=3800mm 16/05/20138Alessandro Petrolini - Dipartimento di Fisica dell’Università di Genova e INFN

9. 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

10. 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

11. 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

12. 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

13. 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

14. Prototype of the EC 16/05/201314Alessandro Petrolini - Dipartimento di Fisica dell’Università di Genova e INFN

15. 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

16. 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

17. 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

18. 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

19. SPARE

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21. 21 >460mm CRANE TT support 16/05/2013 Alessandro Petrolini - Dipartimento di Fisica dell’Università di Genova e INFN