TELL1 A common data acquisition bard for LHCb

SciFi BGV

Guido Haefeli, EPFL, 12.6.2013

Guido Haefeli1Outline2LPHE (EPFL group) at LHCbFiber tracker for LHCb UpgradeFiber tracker how it worksBGV SciFi modulesGuido Haefeli2

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Fiber module and multichannel detectorFiber module on carbon fiber structureSmall region with lightFiber module seen from the detector, detector outline is super imposedThe light is collected by several channels, no alignment with fibers.128 Ch detector mounted on a PCB.LED for light injectionTemp. sensorPictures from Aachen SciFi development7Guido Haefeli7mean positionDetector signal overview

Particle creates photons in each fiberPhotons can create signal(fired pixels are red)Pixels belong to different detector channelspossignal

8Guido Haefeli8Requirements for the SiPM detectorSize and number of channelsSize of channel adapted to the fiber and fiber mat (250m pitch and 1.32mm height). As many channels as possible to reduce the inefficiency between detectors. 250m gaps between 64Ch and 400m between 128Ch is the baseline.Thin epoxy protection layer of order of 120m.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=26GyX-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.

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10Guido Haefeli10Why using a fiber tracker in BGV11Many 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 LHCb SciFi are not present (radiation and low signal due to fiber irradiation).Large synergy between BGV and LHCb Upgrade R&D.Same readout electronicsSame detectorsGaining experience for operation in radiation environment.Guido Haefeli11

12X(0) V(5) detection planeY(90) U(95) detection planeCooling enclosureReadout electronicsModule fixationBeam pipeGuido Haefeli12Dimensions of active surface13

Guido Haefeli13Total space requirement14

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Cooling pipe, needs to be isolated with Armaflex (-40C)Rohacell isolation (30mm)Electronics FE-boardDetectorsFibersLight and gas tight cold volumeGuido Haefeli15

Detector and FE-electronics module16DetectorsFlex cablesFE-electronics PCBCableGuido Haefeli16Readout scheme17

2x for x, 2x for v8x per x,u,y,u32x for 4 stations

1-2mDetector, FE-boardRepeater10m-60m

TELL1, DAQ boards with ADCs8x for 4 stationsEthernetNetwork switch, CPU farm8x for 4 stationsGuido Haefeli1718

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