A GEM Detector System for an Upgrade of the CMS Muon Endcaps

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9 Budget and resources The budget and resources are shown in Table 18 for the construction of 160 Triple-GEM detectors. The price of the GEM foils has been largely reduced recently due to technological advances in the last two years. With most of the fabrication taking place at CERN using the new assembly and production facilities being prepared (see Section 5.4), the drift planes, readout planes and the complete detector assembly will be done under one roof lending an optimization of the resources shown under the heading “Detectors”. The quality control of the detectors will be done as explained in Section 5.4 and the relevant cost is shown under the heading of ’Chamber QC’. The installation of the two stations and services namely gas and cooling, comprise a large fraction of the costs as explained in items 3-6. These costs are extrapolated from the actual costs incurred in the installation and commissioning of the RPC stations. The total cost is 7.5 MCHF, of which 4 MCHF is the cost of electronics. The number of channels that have been considered is 270 K for the GE1/1 station and 2.5 million for the GE2/1 station to enhance also the tracking and triggering option in the best possible manner, as discussed in Section 5. The cost for number of channel is marginal once the initial cost for electronics developments have been incurred. The participating institute await the approval to approach their respective funding agancies for commitment to the project and initial indications are positive. In comparison the present RPC system readout is 70 K channels for the barrel and 40 K channels in the forward system. 75
Table 18: Budget and resources based on previous experience. We have considered approximately 2.2 MCHF for the electronics; this includes approximately 522 kCHF for the front-end ASIC silicon cost. Item GE1/1 80 detectors GE1/1 GE2/1 GE1/1 & GE2/1 GE2/1 160 detectors [kCHF] [kCHF] [kCHF] Deliverables price/detector total station price/detector total station total price 1 DETECTORS 5 400 5 800 1200 Readout circuits 0.4 0.4 GEMs and drift planes 3.6 3.6 Drift board 0.5 0.5 Frames 0.05 0.05 Detector assembly 0.3 0.3 HV, connectors 0.05 0.05 Testing 0.1 0.1 2 CHAMBER QC 500 500 1000 Infrastructure at site 220 220 Assembly consumables 100 100 QC tools 130 130 Shipments 50 50 3 INSTALLATION 350 350 700 Consumables 50 50 Mechanics / tooling 100 100 Commissioning 150 150 4 GAS SYSTEM 50 50 100 5 COOLING 50 50 100 6 POWER SUPPLIES 7 HV&LV systems 170 220 390 Cables 100 120 Signal 20 30 HV&LV DCS 20 30 LB Fiber 10 10 HV connectors / components 10 20 LV connector / components 10 10 8 ELECTRONICS 2147 1955 1852 3999 Electronics development 1240 1048 2288 Chips 4.8 51 1.2 51 102 Optoelectronics 51 51 102 Electronics cards 557 660 1320 Crates, Test Boards 66 66 132 Control 30 30 60 Pool rental 48 48 96 GRAND TOTAL 7489 76
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Available on CMS information server
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Abstract This technical proposal ai
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5.3 Simulated chamber properties .
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List of Figures 1 CMS transverse se
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49 Simulated total L1 GEM+RPC trigg
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List of Tables 1 Performance requir
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obtained. The angular resolution is
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of the gas rigidity or discharge. S
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Figure 3: CATIA model of the CMS en
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Therefore, the physics case for add
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(r.m.s.) p /p T T ∆ (r.m.s.) T /p
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3 Studies of small and full-scale G
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Figure 11: Positions of small Tripl
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Page 37 and 38: Table 3: Performance overview for a
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Page 85 and 86: References [1] S. Chatrchyan et al.
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Page 95 and 96: C.4 Product(s) involved 1. GE 1/1 S
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A GEM Detector System for an Upgrade of the CMS Muon Endcaps

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