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SciFi BGV Guido Haefeli, EPFL, 12.6.2013

SciFi BGV Guido Haefeli, EPFL, 12.6.2013. Outline. LPHE (EPFL group) at LHCb Fiber tracker for LHCb Upgrade Fiber tracker how it works BGV SciFi modules. Fiber module and multichannel detector. Fiber module on carbon fiber structure.

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SciFi BGV Guido Haefeli, EPFL, 12.6.2013

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  1. SciFi BGVGuido Haefeli, EPFL, 12.6.2013

  2. Outline • LPHE (EPFL group) at LHCb • Fiber tracker for LHCb Upgrade • Fiber tracker how it works • BGV SciFi modules

  3. Fiber module and multichannel detector Fiber module on carbon fiber structure Fiber module seen from the detector, detector outline is super imposed 128 Ch detector mounted on a PCB. Temp. sensor LED for light injection Small region with light The light is collected by several channels, no alignment with fibers. Pictures from Aachen SciFi development

  4. Detector signal overview mean position signal pos Photons can create signal (fired pixels are red) Pixels belong to different detector channels Particle creates photons in each fiber

  5. Requirements for the SiPM detector • Size and number of channels • Size of channel adapted to the fiber and fiber mat (250μm pitch and 1.32mm height). • As many channels as possible to reduce the inefficiency between detectors. 250μm gaps between 64Ch and 400μm between 128Ch is the baseline. • Thin epoxy protection layer of order of 120μm. • Operation in LHCb upgrade radiation environment (50fb-1)with a neutron shield (neutron dose reduced by a factor 2) possible: • Neutron dose D=3*1011neqv/cm2 (we call this 25fb-1) • Ionizing dose Di=26Gy • X-talk, after-pulse and gain should not significantly change. • Noise cluster rate (after processing the data with clustering algorithm) below 2MHz for the end of detector life keeping the efficiency at 99%. • Sufficient PDE for worst case light yield with irradiated fibers (fibers plus detector) 16PE.

  6. Why using a fiber tracker in BGV • Many short fiber tracker modules have been produced by Aachen during the last 3 years. Good quality and fast production possible. • Short fiber modules have enough light, good resolution and are robust. • Radiation environment in BGV is quite low (smaller than 1kGy) at 20cm distance (right)? Major difficulties compared to LHCbSciFi are not present (radiation and low signal due to fiber irradiation). • Large synergy between BGV and LHCb Upgrade R&D. • Same readout electronics • Same detectors • Gaining experience for operation in radiation environment.

  7. Cooling enclosure X(0°) V(5°) detection plane Readout electronics Y(90°) U(95°) detection plane Beam pipe Module fixation

  8. Dimensions of active surface

  9. Total space requirement

  10. Cooling pipe, needs to be isolated with Armaflex (-40°C) Light and gas tight cold volume Rohacell isolation (30mm) Electronics FE-board Detectors Fibers

  11. Detector and FE-electronics module Cable FE-electronics PCB Flex cables Detectors

  12. Readout scheme Network switch, CPU farm 1-2m 10m-60m Ethernet 2x for x, 2x for v 8x per x,u,y,u 32x for 4 stations 8x for 4 stations 8x for 4 stations Repeater TELL1, DAQ boards with ADCs Detector, FE-board

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