T. Matsushita 1 Scintillating fibre tracker The scintillating fibre tracker reconstructs muon tracks before and after the MICE cooling section in 4 T magnetic field to measure the relative change in emmitance of the muon beam The tracker consists of five planar scintillating-fibre stations Each station is composed of three planes of scintillating fibre laid out with 120 degrees radial spacing Each fibre plane is comprised of a ‘doublet-layer’ in which the fibres in the first layer of the doublet are interleaved with those in the second

T. Matsushita 2 Doublet-layer production -- 1 Light yield of bulk scintillator has been checked and found to be OK Scintillating fibres are made from the bulk scintillator One end of 350  m scintillating fibres are cut/polished then aluminum is sputtered to reflect signal to read-out end Reflectivity of mirrored end is monitored; Mean R = 75% RMS=4%

T. Matsushita 3 Doublet-layer production -- 2 Then fibres are laid-out on a mold with groove pitch of 426  m; 1491 fibres per doublet-layer 24 doublet-layers completed; production rate is one layer per day

T. Matsushita 4 Station assembly --Bundling To reduce the cost of the read-out electronics seven 350 µm fibres are read out through single clear-fibre light-guide with diameter of 1.05 mm Then ‘bundling’ is needed, where seven consecutive fibres are bundled with a heat-shrink tube, then bundles are laid out in a tool called ‘comb’ Number of fibres in each bundle is checked

T. Matsushita 5 Station assembly --Connectorisation A 22 way optical connector mates seven scintillating fibres with one clear fibre waveguide; alignment of connector holes at scintillating fibres and clear fibres sides are checked with ‘go/no-go gauge’ The scintillating fibre bundles are threaded through one of 22 holes of optical connector Number of fibres in each bundle and order of fibres/bundles are checked

T. Matsushita 6 Station assembly --Gluing Three doublet-layers are glued onto a carbon-fibre station frame with 120 degrees radial spacing Optical connectors are attached to carbon-fibre station frame Scintillating fibres are potted to optical connectors As of 30 Nov 2006 the fifth station is waiting for the final step of station assembly; polishing of fibres with diamond fly cutter

T. Matsushita 7 Waveguides production Attenuation length of samples from all clear fibre production batch have been measured; Mean = 8.4 m, Sigma = 0.5m Waiting for the final parts to start waveguide production; joining ring D0 connector Testing cookie Elastic bandsStation connector Internal region Table External region Assembly scheme

T. Matsushita 8 Cryostats & DAQ Cryostats production; All parts in house Work continues to complete the first production cryostat DAQ; Firmware development of AFE-IIt / VME LVDS Serdes Buffer (VLSB) to cope with MICE environment Zero suppression scheme is being developed Read-out scheme via VLSB is being developed Synchronisation with ISIS beam is under consideration Distribution of trigger signal under consideration