February, INP PAN FCAL Workshop in Cracow W. Lohmann, DESY The BCD (Baseline Configuration Document) The next calendar dates Where we are with FCAL

February, INP PAN The BCD Executive Committee for Baseline Configuration GDE Director Barish Regional Directors Dugan – Americas Foster – Europe Takasaki – Asia Accelerator Leaders Yokoya - Asia Raubenheimer - Americas Walker - Europe Responsible for decisions and documentation for the Baseline Configuration Document (BCD) GDE Executive Committee

February, INP PAN ILC Parameters

February, INP PAN The BCD The Baseline Machine (500GeV) The 1 TeV upgrade

February, INP PAN 2 Interaction Regions Two Detectors, because : Confirmation and redundancy Complementary Collider options Competition Efficiency, reliability Historical lessons We have to contimue with two design options! 2 mrad and 20 mrad

February, INP PAN GDE groups Machine design, Cost ….. Siting, civil construction ……. Physics, Detectors - J. Brau (America) - F. Richard (Europe) - H. Yamamoto (Asia) ………. Area subsystem leads A. Seryi, H. Yamamoto (MDI panel) D. Angal-Kalinin Beam delivery system

February, INP PAN The next calendar dates EUDET kick-off meeting in Hamburg, February LCWS Bangalore, March Physics Research Committee, May ECFA WS, Valencia, November, 2006 We have to present our plan for the next 4 years LDC outline document, presentations A written report and a presentation are expected prepare ourselfs, FCAL meeting before?

February, INP PAN Where are we with FCAL -We worked out an advanced design for zero or small crossing angle; -this was accepted and acknowledged in Snowmass and Vienna (Several talks by H. Abramowicz, K. Afanaciev, C.Grah,V.Drugakov, A.Elagin, B. Pawlik, A. Sapronov) -the performance (resolutions, efficiencies, biasas) are understood from simulations for partly realistic detectors -the backscattered background ( into the central detector part) is estimated - Some studies are done for the 20 mrad version (beamstrahlung background, systematics of beamposition)

February, INP PAN Fast Beam Diagnostics Detection of Electrons and Photons at very low angle – extend hermeticity IP VTX Measurement of the Luminosity with precision (<10 -3 ) using Bhabha scattering BeamCal FTD L* = 4m 300 cm LumiCal: 26 <  < 82 mrad BeamCal: 4 <  < 28 mrad PhotoCal: 100 <  < 400  rad Very Forward Detectors Beamstrahlung Depositions: 20 MGy/year Rad. hard sensors e.g. Diamond/W BeamCal LumiCal Silicon/W sandwich R&D for ILC (DESY PRC R&D 02/01): Instrumentation of the Very Forward Region of the ILC Detector BeamCal

February, INP PAN 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

February, INP PAN 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

February, INP PAN A few topics to be thought Electron detection efficiency: Algorithm relies on constant bunch charge Look on Dumping Rings How stable is this mechanism? -Bunch-to-bunch fluctuations (Contact to machine people )

February, INP PAN 20 mrad design Changes within LDC: -TPC is shorter -HCAL should cover smaller angles -LumiCal aligned with or in front of ECAL -Montage-friendly -Background on LumiCal ? - Background in the inner Detector?

February, INP PAN What has to be done: We need a design for 20 mrad crossing angle -new geometry -repetition of many simulations -studies of backgrounds, beamstrahlung, backscattered into the central detector We have to understand Bhabha phenomenology in more details -Status of the theory and generators - How influence radiative effects for a given detector the uncertainty of the measurement - Optimised segmentation/structure for LumiCal - Realistic readout scheme

February, INP PAN What has to be done: Sensor and Readout -Continuation of diamond studies (more samples with promising diagnostics, linearity, homogeneity, high radiation doses.) -Si sensor studies (to learn to work with them). -Si sensor radiation test. -Assembly of full sensor planes  prototype test. -Readout electronics design for the prototype O(1000) channels. -Concept for the readout electronics -Concept Design for the ‘fast readout’ and fast diagnostics (related to Eurotev).

February, INP PAN This meeting at INP -Reports on many topics mentioned -Discussions on ‘critical’ Issues 20 mrad design more realistic simulations prototyps and testbeam electronics concept preparation of the EUDET kick-off meeting Lets make a WORKshop and see at the end where we’ll go