christmas

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Update on the project - selected topics - Valeria Bartsch, Martin Postranecky, Matthew Warren, Matthew Wing University College London

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Content: Introduction UCL activities test beams - analysis and data taking DAQ - on the way to a technical prototype

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Members of the Collaboration 3 regions 12 countries 41 institutes > 200 physicists

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Technical prototypes Various technologies Can be only partially equipped Appropriate shapes (wedges) for ILC detectors All bells and whistles (cooling, integrated supplies…) Detailed test program in particle beams Goals of the Collaboration To provide a basis for choosing a calorimeter technology for the ILC detectors To measure electromagnetic and hadronic showers with unprecedented granularity To design, build and test ILC calorimeter prototypes To advance calorimeter technologies and our understanding of calorimetry in general Physics prototypes Various technologies (silicon, scintillator, gas) Large cubes (1 m3 HCALs) Not necessarily optimized for an ILC calorimeter Detailed test program in particle beams

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PFAs and Calorimetry 18%/√E Maximize segmentation of the calorimeter readout O(<1 cm2) in the ECAL O(~1 cm2) in the HCAL ~O(107 – 108) channels for entire ILC calorimeter YES! Fact Particle Flow Algorithms improve energy resolution compared to calorimeter measurement alone (see ALEPH, CDF, ZEUS…) How do they work? Minimize confusion term High segmentation The real challenge Can PFAs achieve the ILC goal?

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Content: Introduction UCL activities test beams - analysis and data taking DAQ - on the way to a technical prototype

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CALICE Test Beam Activities - 2007 UK + ECAL run coordinator from RHUL Physics prototype 3 structures with different W thicknesses 30 layers; 1 x 1 cm2 pads 12 x 18 cm2 instrumented in 2006 CERN tests about 6480 readout channels TCMT AHCAL ECAL

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CALICE Test Beam Activities - 2007 summary of data taking: +, -, e+, e-, p: 6-180 GeV with position scans angles from 00 - 300 even accidents could not stop the testbeam success Example from 2006 data: longitudinal shower profile

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Content: Introduction UCL activities test beams - analysis and data taking DAQ - on the way to a technical prototype

DAQ architecture: 

DAQ architecture Slab hosts VFE chips DIF connected to Slab LDA servicing DIFs LDAs read out by ODR PC hosts ODR, through PCIexpress C&C routes clock, controls

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Single Event Upsets (SEUs): principle sensitive volume critical energy particles depositing high amount of energy can change state of electronics the probability of a single event upset (SEU) depends on the deposited energy

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SEUs: main backgrounds machine backgrounds: gg -> hadrons: 1011events/h pair production: 107 events/h physics backgrounds: QCD events: 107 events/h tt and WW: 103 events/h 106 p,p,n hitting FPGAs depending on the FPGA type chosen: 0.09 - 4.2 SEUs/h for the whole ECAL 1 SEU in the ECAL every 14 min - 12 hours

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Conclusion: test beams: 2006 analysis needs to be finalised, 2007 analysis not yet started, challenging program for 2008/2009 DAQ: at the moment only components ready, need to be integrated to a whole system by 2008 SEU study finished, does not suggest major obstacle not mentioned: optical switch: bought and basic tests performed DAQ software: in development

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Merry Christmas & a happy new year 2008