March 31, 2002 Linear Collider Detector R&D Topics Calorimetry energy flow need detailed simulation followed by prototype beam test demonstration further develop physics cases for excellent energy flow eg. Higgs self-coupling, WW/ZZ at high energy, recon of top and W for anomalous couplings?, others (SUSY, BR(H>160)) integrate E-flow with flavor tagging study readout differences for Tesla/NLC importance of K0/Lambda in energy flow calorimeter parametrize E-flow for fast simulation forward tagger requirements study effect of muons from collimators/beamline further development of simulation clustering tracking in calorimeter digital calorimeter study parameter trade-offs (R seg, layers, coil location, transverse seg.) in terms of general performance parameters in terms of physics outcome refine fast-sim parameters from detailed simluation integrate electronics with silicon detectors in Si/W reduce silicon detector costs engineer reduced gaps mechanical/assembly issues B = 5 Tesla? can scintillating tile Ecal compete with Si/W in granularity, etc.? crystal EM (value/advantages/disadvantages) barrel/endcap transition (impact and fixes) Tracking refine the understanding of backgrounds tolerance of trackers to backgrounds will large background be a problem for the TPC (field distortions, etc) are ionic space charge effects understood? study pattern recognition for silicon tracker (include vxd) study alignment and stability of silicon tracker what momentum resolution is required for physics, eg. Higgs recoil, slepton mass endpoint, low and high energy understand tracker material budget on physics physics motivation for dE/dx (what is it?) detailed simulation of track reconstruction, especially for a silicon option, complete with backgrounds and realistic inefficiencies include CCDs (presumably) in track reconstruction timing resolution readout differences between Tesla/NLC time structure role of intermediate layer tracking errors in energy flow (study with calorimeter) forward tracking role with TPC alignment (esp. with regard to luminosity spectrum measurement) develop thorough understanding of trade-offs in TPC, silicon options large volume drift chamber (being developed at KEK) development of large volume TPC (large European/US collaboration at work) development of silicon microstrip and silicon drift systems (being developed in US & Japan) study optimal geometry of barrel and forward system two track resolution requirements (esp. at high energy) this impacts calorimetry - how much? study K0 and Lambda efficiency impacts calorimetry? 2D vs. 3D silicon tracker Vertex Detector resolve discrepancy in Higgs BR studies understand degradation of flavor tagging with real physics events compared to monojets (as seen in past studies) understand requirements for inner radius, and other parameters what impact on physics develop hardened CCDs develop CCD readout, with increased bandwidth develop very thin CCD layers (eg. stretched) segmentation requirements (two track resolution) 500 GeV u,d,s jets pixel size Muons requirements for purity/efficiency vs. momentum on physics channels understand role in energy flow (work with calorimetry) detailed simulation prototype beam tests mechanical design of muon system development of detector options, including scintillator and RPCs Beamline and other areas luminosity spectrum measurement beam energy measurement polarization measurement positron polarization systematics of the Blondel scheme veto gamma-gamma very forward system General issue is calibration running at Z0 peak essential/useful/useless? In general it would be good if more work was done exercising the simulation code that has been put together under the leadership of Norman Graf. Much work has been devoted toward developing a detailed full simulation.