1 SuperB Detector Status-Frascati-09General Detector Status System by System Updates Workshop Goals and Structure. Blair Ratcliff SLAC

2 Detector Evolution-B Factory to SuperB FactoryCDR Baseline components from BaBar. Fused Silica bars of the DIRC DIRC & DCH Support Barrel EMC CsI(Tl) crystals and mechanical structure Superconducting coil & flux return (with modest redesign). Overview: Updated system status Background issues for small beam pipe mostly resolved. Thin silicon detector for layer 0 (Striptlets OK?), and a new 5 layer SVT (Full MAPS detector an option?). DCH inner radius should be as small a possible, but will be ~+20 cm defined by IR components; Length of drift chamber has very modest impact. dE/dx provides useful PID. Cluster counting?. New Photon camera with folded fused silica optics for existing DIRC fused silica bars in their boxes Forward PID system? Issues include physics need, space, performance of EMC, and PID technology. New Forward calorimeter crystals (LYSO). Backward veto EMC? Issues include physics need, timing for possible PID, and placement of DCH electronics, and background sensitivity for electronics near beam pipe. The IFR has Minos-style extruded scintillator with reconfigured BaBar stee Good progress on electronics and trigger. 2

3 Detector Proto-Tech Board/Parallel Session ConvenersDetector Coordinators – B.Ratcliff, F. Forti Technical Coordinator – W.Wisniewski SVT – G. Rizzo DCH – G. Finocchiaro, M.Roney PID – N.Arnaud, J.Vavra EMC – F.Porter, C.Cecchi IFR – R.Calabrese Magnet – W.Wisniewski Electronics, Trigger, DAQ – D. Breton, U. Marconi Online/DAQ – S.Luitz Offline SW Simulation coordinator – D.Brown Fast simulation – M. Rama Full Simulation – F. Bianchi Background simulation – M.Boscolo, E.Paoloni Rad monitor – Lumi monitor – Machine Detector Interface – +DGWG – A. Stocchi, M. Rama

4 Detector Systems Status ReportsProgress on detector subsystems Very useful ETD workshop at CERN in Nov. Progress on Simulations Results from DGWG  An advertisement for the parallel sessions

5 Background Simulation M.Boscolo, E.Paoloni

6 Pair Production BkG. in SVT L07.3 mbarn The detector solenoidal field is the main trap to keep away low pt particles A big mistake in the prediction of the SVT L0 rate (B = 0T inside the beam pipe) was discovered too late (couple of days after the end of the SLAC SuperB Meeting) Error corrected, additional cross checks made Track crossing rate: 7.9 MHz/cm2 Work in progress for the pixel hit rate Dominant Feynman graph Typical event Geant 4 gamma gamma e+ Generator level predictions (CDR) gamma e- Geant4 prediction Track rate (Hz/cm2) Beam pipe SVT Layer 0 SVT Layer 0 radius (cm) Riccardo Cenci

7 SVT-Convener Rizzo

8 Vertex Detector (SVT) 40 cm 30 cm 20 cm Layer0

9 SVT Update I SVT Background studies Progress in SVT FastSim studiesExpected rates at Layer0 location reduced w.r.t results presented at SLAC (bug found in the code): Now 100 MHz/cm2 (safety x 5 included). Still some checks needed. Layer0 with striplets could become again a realistic option (better performance/less material w.r.t hybrid pixel) Occupancy will be ~ 10% (safety x5 included) in 100 ns. Progress in SVT FastSim studies Sensitivity on time dependent measurements compared for Layer0 based on Hybrid Pixel/Striplets with different radii and machine boost. Tracking performance compared with different SVT configurations: Layer0 + 3 / 4 / 5 external strip layers:

10 SVT Update II SVT Mechanics:Progress in the material reduction for pixel module support with active cooling. Design of the beam pipe cooling started: FEA simulation studies. In production: prototype Front-end chip for hybrid pixel, pixel sensor matrix, Al pixel module BUS (ready this week) Modification to FSSR2 readout chip (for striplets and external layers) under study UK groups interested in proposing an SVT based on MAPS pixels (all layers): FastSim evaluation and Conceptual Design ongoing Details on all these activities at the SVT (+DGWG) parallel sessions

11 DCH-Conveners Finnocchiaro & Roney

12 DCH Baseline Design DCH R&D Issues including: R&D has been started.Provides precision momentum Provides particle ID via dE/dx for all low momentum tracks, even those that miss the PID system. A new DCH (similar to now aged BaBar DCH, which must be replaced) Similar gas & cell shape (small improvements may be possible) Carbon Fiber end plates (to reduce material before endcaps) New electronics with location optimized. R&D Issues including: Electronics location and/or mass to reduce effect on backward EMC, Low Mass Endplates Can we do better on dE/dx (counting clusters)? Conical/stepped endplates or other ways to reduce sensitivity close to the beam. Background simulation/shielding optimization. R&D has been started. Need to test all solutions on prototype, DCH

13 Progress in Lab work @ LNF“Prototype 1” 6x4 hexagonal cells à la BaBar Guard wires guarantee uniformity of electric field among cells down to ~1% Readout electronics fully commissioned Using BaBar’s 80%He-20%iC4H10 gas now volume is small, changing mixture is fast taking cosmic ray data now Setting up for studies of waveform digitization

14 Activities in Canada are ProceedingGarfield/Heed/Magboltz studies at Carleton examining cell size/shape and gas optimized for dE/dx and position measurement including possibility of cluster counting Gas studies in the lab at UVic validating Magboltz predictions for gases used in Carleton Magboltz studies: measurements in a series of He-based gases with Isobutane and CF4 Planning for full length prototype construction with tests at TRIUMF in a magnetic field

15 DCH issues for this meetingFastSim studies performed on: DCH inner radius (already at the SLAC meeting) masking the forward part of the wires DCH length (“BABAR” vs “LONG” vs “SHORT”) The short answer is: “the smaller the better” and 3. “makes little difference” Background studies: a work in progress including several background sources varying detector shape and shielding Reviewing design of FEE and DAQ chain Updating cost estimates

16 PID-Conveners Vavra & Arnaud

17 Barrel PID  Improved FBLOCK design (SLAC): all rays focused and ~perpendicular to the detector plane external wedge ( larger cylindrical mirror) + micro-wedge (to help qC resolution) added  Geant4 MC study of the FBlock (Maryland): sqC ~ 9 mrad (w/o chromatic corrections)  Various studies in progress: micro-wedge, glue joints, FBLOCK side reflectivity, etc.  New FDIRC mechanical design (Massimo Benettoni, Padova)  First preliminary bids for BLOCK manufacturing (SLAC)  Software fixes for BLAB2 chip to be installed in FDIRC prototype this month  New BLAB3 chip arrived at SLAC  First estimation of the number of links needed by the DAQ (Orsay, ETD) Jerry’s design 12a.vc6 Corresponding Geant 4 design (Hawaii)

18 Forward PID  Geant 4 simulation of the ‘DIRC-like’ TOF detector started (Orsay)  Starting point: SLAC-Maryland package  Collaboration with a group from the Taras-Shevchenko Ntl. Univ. of Kiev (Ukraine)  First results to be presented this week \  Progress on the mechanical design for the ‘DIRC-like’ TOF  Joint engineering meeting Orsay-CERN (M. Lebeau)-Perugia last Friday  Waveform digitizing electronics « WaveCatcher » (Orsay) tested at SLAC  Analysis of test-bench data for the ‘pixilated’ TOF detector to be presented this week (SLAC, Orsay, Hawaii)  New MC predictions of the Aerogel RICH performances (Novosibirsk)  Included in SLAC graph summarizing the overall performances of all PID detectors  Development of the aerogel forward RICH prototype (Novosibirsk) DCH Forward PID Forward EMC 2 GeV K crossing TOF sector

19 SLAC cosmic ray telescope - “test beam” for the next yearSide view: Two new Hawaii electronics packages: Test bed in the cosmic ray telescope: ~ 4 feet of iron (old TPC magnet) => can require muon > 1.5 GeV. Tracking resolution: ~1 mrad.

20 Other PID News  Analysis of the CRT data continuing (SLAC, Hawaii) Progress on the FastSim selectors (Orsay)  Development of monitoring tools to test the selector inputs and the selector performances  Continuing development of the DIRC simulation in FastSim (Cincinnati, SLAC)  LPNHE (Paris) officially joining the PID: Eli Ben-Haim and Hervé Lebolo (electronics)  Ongoing discussions with Orsay about involvement in barrel electronics  INFN money (20 k€) used to order PMTs and related hardware for Orsay test bench  Continuing to setup a photo-detector testing and scanning system (Maryland)  Continuing study on SiPMTs (Padova)  Novosibirsk physicists visiting SLAC to work on FDIRC Monte-Carlo simulation

21 EMC-Conveners (Cecchi & Porter)

22 Progress on Crystals First ring for the 5x5 matrix received from St. Gobain Other 3 crystals delivered within December (close 1st order) 2 crystals to finish second ring ordered (2nd ring completed) 2 crystals of the third ring ordered 2 crystals from SIPAT delivery in December Quality of the product from other vendors is improving

23 April 2010 Test Test a matrix of 5x5 LYSO crystals + external ring of CsI crystals (CLEO) Crystal procurement: 8 crystals ordered from St. Gobain by INFN 4 more to be ordered by INFN 13 will be ordered by Caltech CsI crystals for the external ring Electronics: 2 options Rome and Perugia are working on a new readout with PD  some channels ready for the BT Caltech has 50 channels available with APD’s + CMS DAQ Mechanics: Carbon fiber or glass fiber structure Simulation: available, tested and running

24 Progress- Beam Test Readout Progress- Beam Test MechanicsCMS DAQ system is under study, some work is needed to have it working for the beam test Integration with ancillary systems at BTF and CERN is Under investigation. Progress- Beam Test Mechanics CAD design has been produced and sent to outside vendors One company has sent an tender offer…another is expected to respond very soon. We expect to place an order within ~ 1 week

25 Simulation To study the effect of the transition region between Barrel and Forward and to better understand the effect of he PID system in front of EMC a clustering algorithm has been implemented. Resolution as a function of forward position Transition Region Resolution as a function of the PID thickness Forward Region

26 Simulation of Backward Endcap-Pb/scintillatorGeometry description in gdml file is now available Sensitive part of the detector is scintillator Only a fraction of shower energy will be recorded. Fast sim has an unrealistic description of the geometry  study a link between fast and full sim Reconstruction algorithm has to be developed

27 Detector Elements-IFR-Convener Calabrese

28 Critical items at the end of the Slac workshopIFR Impact on performance with different iron layouts. Need to finalize the reconstruction code and optimize the detector (geometry, iron, noise tolerance). Need to incorporate modifications (due to R&D studies) into the prototype design.

29 From Slac to LNF IFR Impact on performances of different iron layouts.Need to finalize the reconstruction code and optimize the detector (geometry, iron, noise tolerance). Need to incorporate modifications (due to R&D studies) into the prototype design. New results Design done, orders placed

30 Goals for this meeting IFRReview advancements and achievements in all the development areas Particular focus on: prototype design and construction. detector optimization Review the TDR preparation process and prioritize the short and medium term activities White paper organization.

31 After this meeting: milestones toward the TDRIFR finalize prototype design (mechanics and electronics) . place orders for prototype construction (needed simulation results first) begin prototype assembly prototype test with cosmics test beam done Now done Now January 2010 Spring 2010 Summer 2010 A very hot season is waiting for us!

32 Electronics, Trigger and DAQ- Conveners,Breton, Luitz, & Marconi

33 What was done since SLAC workshop (1)Right after the workshop, as requested at the TB, we started working on: the redefinition of the TDR chapters in view of the white paper the parts linked to ETD and online DAQ in the SuperB WBS document We had a two-day ETD/online dedicated meeting at CERN beginning of November 14 people (all sub-systems represented except DCH) very pleasant and useful reviewed ETD architecture once again to convince ourselves our choices were coherent with our goals discussed the online and the L1 trigger developed chapter outline for the white paper as costing couldn’t be performed without realistic numbers for all the different type of fast links, especially the readout links we requested all the sub-detectors to give us estimations for these numbers before the meeting. after further exchanges we now a first estimate of these numbers. defined Online. Discussed choices for Online technologies Could LHC frameworks & packages be directly applicable? Network protocols for event building and data transport

34 What was done since SLAC workshop (2)Realized importance of EMT granularity for the level 1 trigger. in BABAR, crystals were summed by 24 before being used in the trigger algorithm. A full granularity trigger seems feasible with today’s technology (like on LHCb for instance). Needed to detect overlap and pileup at the trigger level, Bhabha veto, etc. all the calorimeter information should go to the EMT (the EMC front-end readout could be untriggered….like BaBar….but the latency buffer could then reside in the EMT itself, thus keeping the same overall architecture and a reasonable number of ROMs But the number of calorimeter readout links (~ 600) will be much higher than the total of all other sub-detectors (BABAR like)  the conservative approach is to assume a baseline design with a full granularity trigger. ETD chapters of the white paper well underway, with the help of all sub-detector conveners and electronics contacts.

35 What we expect from this workshopRefine our estimates for the number of links (of all types) Wednesday at 9:00 These elements are deeply related to the system topology Focus on level 1 trigger (Thursday at 11:15) Consider the optimum number of readout links at the input of a ROM Try to have the ETD cost estimate ready for the TB Further discussions on Online (many informal) Applicability of existing LHC software and frameworks to SuperB Online Discussion of event building networking protocols and transports Run Control and Detector Control system Review of data logging rates

36 Detector Geometry Working Group Activities since the SLAC workshop Rama/Stocchi

37 S. Germani N. Neri M. Rama Impact of Layer0 on TD measurementsImpact of FPID on FEMC Energy resolution S. Germani N. Neri X0 should be kept ~10% dE/dX in Forward region (here 23degrees) M. Rama Some impact on dE/dx if the DCH is shortened

38 for November productionSuperB BEMC Resolution in FastSim Backward EMC for B  t n Decay Study on BRECO HAD (BD0(Kp)p) and Btn. Now looking at t pp0n. 10% gain in Significance A. Chivukula, A. Rakitin Minor gain considering other r or p0 backgrounds Chih-hsiang Cheng Considering possible direct r backgrounds BEMC resolution too bad to reconst. π0. PID in BEMC 100ps time res. adequate to have a relevant K/p separation Hadronic Breco code for November production Chih-hsiang Cheng E. Manoni

39 A lot of work and results expected for this weekWed morning I: -) study of Btau nu [A. Rakitin] -) backward EMC response in FastSim and use as PID device (TBC) [C. Cheng] -) Geant4 studies of forward EMC [S. Germani] -) S resolution vs layer 0 [N. Neri] Wed morning II: -) SVT external layers [J. Walsh] -) tracking and dE/dx vs DCH length [M. Rama] -) analysis of B->K(*)nu nubar - SL tag [A. Perez] -) analysis of B->K(*)nu nubar - had tag [E. Manoni] Thu afternoon: -) FARICH [E. Kravchenko] -) IFR [G. Cibinetto]

40 Agenda

41 Detector Related Workshop Sessions41

42 Focus of Workshop Progress on Global System and Integration IssuesGeometry Working Group Computing & Simulation Report status progress and refine understanding needed towards final subsystem and general system design Design R&D (Beam Tests & Milestones) Integration Organization Manpower, Institutions Costs & WBS White paper-TDR Documentation Now  White paper. Milestones/outline/text  TDR (end of ?). Lots of progress in all areas, but more active people needed. Please bring your friends and colleagues! 42