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FCAL Workshop in Munich

FCAL Workshop in Munich. W. Lohmann, DESY. The 14 mrad X-angle, two IPs The push-pull option The next calendar dates Where we are with FCAL. The new IR scheme. Detector hall. Beam Delivery for two IPs. The push-pull option.

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FCAL Workshop in Munich

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  1. FCAL Workshop in Munich W. Lohmann, DESY The 14 mrad X-angle, two IPs The push-pull option The next calendar dates Where we are with FCAL MPI Munich

  2. The new IR scheme MPI Munich

  3. Detector hall Beam Delivery for two IPs MPI Munich

  4. The push-pull option Platform for electronic and services (~10*8*8m). Shielded (~0.5m of concrete) from five sides. Moves with detector. Also provide vibration isolation. accessible during run (rad worker) fence not accessible during run accessible during run (GERT) MPI Munich

  5. The next calendar dates EUDET annual meeting Oct. 18-20 We have to report about our results after the first year, and to write a report ECFA workshop, November 6-10 Draft (final) of the DCR (will be published end of 2006 together with the machine RDR) ACFA WS, Beijing, February 2007 LCWS,Hamburg, June 2007 prepare ourselfs, FCAL meeting before? MPI Munich

  6. Where are we with FCAL -We worked out an advanced design for several crossing angles, 2, 20, 14 mrad; -this design is part of the LDC, (partly also for SiD, GLD) concepts -we got an encouraging statement by the PRC -we have new members and extended our scope – GamCal to analyse photons (welcome Bill Morse) -we founded a Collaboration -we are part of EUDET, EUROTEV However: many questions still not answered MPI Munich

  7. Current design (Example LDC, 14 mrad): Luminometer TPC HCAL ECAL BeamCal • -Background on • LumiCal ? • Background in the • inner Detector? Technology: Tungsten/Si (C) sandwich MPI Munich

  8. A few topics to be thought Selection of Bhabha events: Energy selection cut • At which energy this cut has to be put? • Theoretical uncertainty • Energy scale uncertainty MPI Munich

  9. A few topics to be thought The Bhabha cross section depends on the polarisation • How well is this understood? -higher order corrections • considered in the Monte Carlo MPI Munich

  10. A few topics to be thought Electron detection efficiency: Look on Dumping Rings • How stable is this mechanism? • Bunch-to-bunch fluctuations (Contact to machine people ) Algorithm relies on constant bunch charge MPI Munich

  11. Simulations • Progress: -GEANT4 simulation of LumiCal, new geometry -4f background in LumiCal -Beam-diagnostics with GamCal, BeamCal Topics: - GamCal design - Reconstruction of Bhabha events from clusters - How influence radiative effects for a given detector the uncertainty of the measurement - Optimised segmentation/structure for LumiCal - Realistic readout scheme, - More realistic BeamCal simulation - Backscatterd background MPI Munich

  12. Sensors and Readout • Progress: • -testbeam studies: performance as a function of • the absobed dose, for the first time done • up to a few MGy • - Laser alignment • - first experience with the Phy3 chip • - First experience with GaAs, very soon large prototypes • Topics: -continue studies of diamond sensors, GaAs • -Si sensor studies (to learn to work with them). -Assembly of full sensor planes  prototype test. -Readout electronics design for the prototype O(1000) channels. -Concept for the readout electronics -very critical issue ! MPI Munich

  13. This meeting at MPI • -Reports on many topics mentioned -Discussions on ‘critical’ issues -More responsibilities to subgroups (simulation, electronics, sensors) -periodic reviews of milestones (PRC, EUDET) -conferences, LC notes, publications… MPI Munich

  14. MPI Munich

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