Takashi Matsushita Imperial College T. Matsushita 1 Station5 in UK

T. Matsushita 2 Mechanical Station connectors Go no-go gauge made at Imperial 40 station connectors for station5 outsourced All passed go no-go gauge check No more hall misalignment Waveguide connectors Go no-go gauge being prepared at Liverpool Was in long queue at Imperial workshop Will be outsourced to the same firm as soon as the gauge is ready Carbon-fibre frame Waiting in queue at Imperial workshop Engineering drawings will be posted on Web During the meeting

T. Matsushita 3 QA – bundling/connectorisation Purpose Ensure each bundle has correct seven fibres No more/no less fibres in a bundle No swap of fibres across bundles and no skip Ensure each bundle goes to correct hole of optical connector No more nightmare of channel decoding Methods Visual scan of skipped fibre in the middle of bundles Take picture of fibre bundle to count number of fibres in a bundle Take movie of fibre scan with UV LED to check sequence of fibres

T. Matsushita 4 QA – bundling/connectorisation Setup LED: 20 mW, peak = 405nm 86 hours illumination shows no noticeable damage on fibre ~20 minutes 100W Mercury arc illumination did damage fibre; yellow fluorescence instead of green Spectrophotometer shows a major increase in absorption in the blue region (~400 – 450nm) Translation stage LED/optics Doublet layer CCD Beam spot image by CCD50 micron x ~4mm(not this size on fibres) Side view Front view

T. Matsushita 5 QA – bundling/connectorisation First we make bundle of seven fibres; single read-out channel “comb” is used for bundling and QA procedure Bundling and QA takes 2 hours for a connector; 20 hours per view QA image for one connector worth of bundles comb Comb with bunldes in grooves

T. Matsushita 6 QA – bundling/connectorisation Second we thread bundle through each hole of connector Fibre radius guide is used for connectorisation “bridge” is used for QA Connectorisation/QA takes 1 hour per connector, 10 hour per view bridge Fibre radius guide Bridge with connectors QA image for one connector

T. Matsushita 7 QA – fibre counting CCD image is analysed by software. The software notifies an operator if there is any failure/suspicious bundles

T. Matsushita 8 QA – sequence check X (pixel) Software to check fibre sequence is under optimisation with mirrored and production pitch doublet-layer Y(pixel) Trace of centre of illumination

T. Matsushita 9 Station acceptance test set-up Assembled stations will be tested using a high energy photon source and the full MICE readout chain Quality check:uniformity along the fibre, dead channels Characterisation:light yield, calibration of channels Components Scanning system in a light tight box X-Y micro-positioning stage source: Co-57, 122keV photon source 111MBq activity (O(10 2 ) Hz of triggerable events) Readout + DAQ system waveguides: will be prepared using new connectors VLPC with cryogenics (slow control via 1553): cryostat, cold-head, water-cooled compressor, chiller electronics: AFEIIt (self-trigger at 3 p.e. threshold), VLSB DAQ via SBS: Excel based software

T. Matsushita 10 Station acceptance test set-up Scanning system being prepared at IC Readout components and firmware being tested/developed (US) Estimated time needed for the test per station ~ 5 days Plan to be ready by the time the assembly of station 5 completes (station 4 used at the KEK testbeam will be tested first) back-up plan is to do a cosmic ray test for station 5 at FNAL if possible

T. Matsushita 11 Station5 assembly status Bundling/Connectorisation/QA tried with newly delivered doublet-layer Bundling/QA of View X for station5 starts on Monday Estimated time needed to complete each view is one week Estimated completion date sometime in November Depends on readiness of carbon-fibre station frame