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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. - PowerPoint PPT Presentation
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Octobre 17 2006 MPI 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
Octobre 17 2006 MPI Munich
The new IR scheme
Octobre 17 2006 MPI Munich
Detector hall
Beam Delivery for
two IPs
Octobre 17 2006 MPI Munich
accessible during run (rad worker)
accessible during run (GERT)
not accessible during run
The push-pull option
fence
Platform for electronic and services (~10*8*8m). Shielded (~0.5m of concrete) from five sides. Moves with detector. Also provide vibration isolation.
Octobre 17 2006 MPI Munich
The next calendar dates
EUDET annual meeting Oct. 18-20
ECFA workshop, November 6-10
ACFA WS, Beijing, February 2007
We have to report about our results after the first year, and to write a report
Draft (final) of the DCR (will be published end of 2006 together with the machine RDR)
prepare ourselfs, FCAL meeting before?
LCWS,Hamburg, June 2007
Octobre 17 2006 MPI Munich
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
Octobre 17 2006 MPI Munich
Current design (Example LDC, 14 mrad):
Luminometer
BeamCal
TPC
ECA
L
HCAL
-Background on LumiCal ?- Background in the inner Detector?
Technology: Tungsten/Si (C)
sandwich
Octobre 17 2006 MPI Munich
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
Octobre 17 2006 MPI Munich
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
Octobre 17 2006 MPI Munich
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 )
Octobre 17 2006 MPI Munich
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
Octobre 17 2006 MPI Munich
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 !
Octobre 17 2006 MPI Munich
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…
Octobre 17 2006 MPI Munich