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

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.
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