Super B Detector StatusOrsay 09 Detector Overview System

Super. B Detector Status-Orsay 09 • Detector Overview • System by System Status • Structure of the workshop. Blair Ratcliff SLAC Super. B Workshop, Orsay, Feb. 15 -18, 2009 Blair Ratcliff, SLAC

Directions for Detector Optimization (for Barbarians) ¡ From Machine and Environment: • Smaller Boost (7 x 4 Ge. V; bg=0. 28) Smaller radius beam-pipe to retain adequate vertex resolution. Larger barrel acceptance. More particles backward/less forward in detector with somewhat softer spectrum forward. • Some (though not all) components of machine background components will be substantially larger. Improve detector segmentation Improve detector speed Improve radiation hardness as needed. ¡ From general physics goals, which emphasize rare decays, LFV in t physics, and recoil (n) physics l ¡ ¡ Would like best possible hermeticity, with good subsystem efficiency and performance. ~x 100 Luminosity Improved trigger, DAQ, & computing (~15 years later) Last, but not least, must replace aging components and technologies. Super. B Workshop, Orsay, Feb. 15 -18, 2009 2 Blair Ratcliff, SLAC

CDR Detector Layout – Based on Babar BASELINE New detector elements OPTION 3 Super. B Workshop, Orsay, Feb. 15 -18, 2009 Blair Ratcliff, SLAC

Detector Evolution-B Factory to Super. B Factory ¡ CDR Baseline based on Ba. Bar. It reuses l l ¡ Some elements have aged and need replacement. Others require moderate improvements to cope with the high luminosity environment, the smaller boost (4 x 7 Ge. V), and the high DAQ rates. l l l l l 4 Fused Silica bars of the DIRC & DCH Support Barrel EMC Cs. I(Tl) crystals and mechanical structure Superconducting coil & flux return (with some redesign). Small beam pipe technology Thin silicon pixel detector first layer, and a new 5 layer SVT. New DCH with CF mechanical structure, modified gas and cell size New Photon detection for DIRC fused silica bars Possible Forward PID system (TOF in Baseline option) New Forward calorimeter crystals (LYSO). Backward veto Minos-style extruded scintillator for instrumented flux return Electronics and trigger- x 100 real event rate Computing- to handle massive date volume Super. B Workshop, Orsay, Feb. 15 -18, 2009 Blair Ratcliff, SLAC

Detector Systems Status and R&D Progress • • • Substantial R&D Progress in many detector subsystems (will discuss below) Need to bring in more institutions and develop appropriate groups and strengthened leadership for the full TDR phase. Growing the computing effort Substantial progress on fast and full simulation Geometry Working Group Detector Session Conveners • Vertex Detector (SVT)- Rizzo • Drift Chamber (DCH)- Finnochiaro • Particle Identification (PID)- Arnaud & Va’vra • Electromagnetic Calorimeter (EMC)- Hitlin • Instrumented Flux Return (IFR)- Calabrese • Electronics- Breton and Marconi • Computing- Morandin • Fast Simulation- Brown and Rama • Full Simulation- Bianchi and Paolini • Detector Geometry Working Group- Rama and Stocchi Super. B Workshop, Orsay, Feb. 15 -18, 2009 Blair Ratcliff, SLAC

Detector Elements-SVT-Convener Rizzo Super. B Workshop, Orsay, Feb. 15 -18, 2009 Blair Ratcliff, SLAC

Vertex Detector (SVT) 20 cm Layer 0 30 cm 40 cm Smaller machine asymmetry Need a new SVT (very similar to that of the 5 layer Ba. Bar SVT) supplemented by a new layer 0 to measure the first hit as close as possible to the production vertex. Goal is coverage to 300 mrad both forward and backward. • Beam pipe radius and thickness are crucial to obtain adequate resolution in vertex separation. • Super. B Workshop, Orsay, Feb. 15 -18, 2009 Blair Ratcliff, SLAC

SVT (SLIM 5) Beam Test Sep. ’ 08 @ CERN Successfully tested two options for Layer 0: ¡ CMOS MAPS matrix with fast readout architecture (4096 pixels, 50 x 50 mm pitch, in-pixel sparsification and timestamp) l l l ¡ Hit efficiency up to 92% (room for improvement with sensor design optimized) Good uniformity across the matrix. Intrisinc resolution ~ 14 mm compatible with 50 mm pitch and digital readout. Thin (200 mm) striplets module with FSSR 2 readout chips (not optimized to read the n-side) l ¡ MAPS Hit Efficiency vs threshold S/N=25 (p-side) First demonstration of LVL 1 capability with silicon tracker information sent to Associative Memories Super. B Workshop, Orsay, Feb. 15 -18, 2009 MAPS resolution vs threshold Blair Ratcliff, SLAC

Low mass support & cooling for Layer 0 pixel modules ¡ Developed a module support structures with cooling microchannels integrated in the Carbon Fiber/Ceramics support l l ¡ ¡ The total thickness is: 0. 35 % X 0 Consistent with the requirements First thermohydraulic measurements in good agreement with simulation and within specs. Cooling system based on microchannels can be a viable solution to thermal and structural problems of the Layer 0 detector, 12. 8 mm Measurements 3 mm Details of Ceramic and Carbon Fiber support Carbon Fiber Module TFLUID Heater Pw Capacity T_IN T_OUT P_IN 9. 5 °C 2 W/cm 2 0. 7 Kg/min 41. 1 °C 43 °C Simulation: T_IN = 37 °C (variation of several degrees possible due to uncertainty on thermal conductivity of kapton and glue) Heater @ 2 W/cm 2 2. 6 bar Simulated module Super. B Workshop, Orsay, Feb. 15 -18, 2009 Temp. sensor Blair Ratcliff, SLAC

SVT Activities for TDR (I) Activities now more focused on TDR preparation (two years) More R&D still needed for Layer 0: ¡ Plan to build a multichip CMOS MAPS prototype module with specs close to the Super. B Layer 0 requirements Testbeam in 2010. l All the module components could be the same for a Layer 0 module based on Hybrid Pixels. Activity funded by INFN. Institutions: Bologna, Milano, Pavia/Bergamo, Pisa, Roma III, Torino, Trieste. ¡ Hybrid Pixel: more emphasis now on this option: it could become the baseline Layer 0 option for the TDR in case MAPS are not considered mature enough by that time. l ¡ Need to demonstrate by 2010 that reduction in the front-end pitch to 50 x 50 mm 2 and in the total material budget is possible to meet Layer 0 requirements. Striplets: continue to evaluate the use of FSSR 2 readout chip and light interconnections from sensor to front-end Super. B Workshop, Orsay, Feb. 15 -18, 2009 Blair Ratcliff, SLAC

SVT Activities for TDR (II) Background Simulation: ¡ This set the scale for requirements on Layer 0 and the inner SVT Layers. External Layers Design ¡ ¡ Technology is not an issue Need to optimize the geometry with Fast Simulation Need to evaluate the best front-end chip for strip modules among the ones “on the market” (FSSR 2…) Engineering Off Detector electronics and DAQ Development Mechanics: ¡ ¡ Beam-pipe design Light support and cooling for Layer 0 modules Module design for the external Layers Design the full SVT support structure (want to have the Layer 0 easily accessible for replacement). Important interplay with IR design. ¡ A significant amount of work is needed for the TDR and not all listed activities are well covered. Super. B Workshop, Orsay, Feb. 15 -18, 2009 Blair Ratcliff, SLAC

Detector Elements-DCH-Convener Finnocchiaro Super. B Workshop, Orsay, Feb. 15 -18, 2009 Blair Ratcliff, SLAC

DCH Baseline Design • • Provides precision momentum Provides particle ID via d. E/dx for all low momentum tracks, even those that miss the PID system. A new DCH (similar to now aged Ba. Bar 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: • • DCH Electronics location and/or mass to reduce effect on backward EMC, Low Mass Endplates Can we do better on d. E/dx (counting clusters)? Conical endplates or other ways to reduce sensitivity close to the beam. Background simulation/shielding optimization. Some R&D has been started. Need to test all solutions on prototypes Has been a small group (LNF). Canadian institutions starting work. Super. B Workshop, Orsay, Feb. 15 -18, 2009 Blair Ratcliff, SLAC

DCH: Activities & News since Elba Continuing work on We welcome the addition to the DCH group of two institutions Simulation Small scale prototypes Carleton and University of Victoria Super. B Workshop, Orsay, Feb. 15 -18, 2009 Blair Ratcliff, SLAC

Progress in DCH Simulation • Fast simulation (V 0. 0. 2) developed for Super. B Geometry, material, resolutions easily configurable through xml interface • Goals compare performances of different DCH configurations optimize DCH design using additional inputs: machine bkg, spatial resolution for different cell/gas configuration, etc. • Example: compare nominal cell config. with x 2 n. of cells, with “realistic” point space resolution Resolution [Me. V] gas+wires realistic reso 125 m gas+wires realistic reso 140 m x 2 #cells E (B→ ) 25. 4± 0. 3 27. 4± 0. 3 E (B Phi Ks) 15. 6± 0. 2 17. 6± 0. 2 Pt [1. 0, 2. 0] 10. 2± 0. 2 11. 7± 0. 2 Pt [2. 0, 2. 5] 13. 4± 0. 1 14. 5± 0. 2 Pt [2. 5, 3. 0] 15. 8± 0. 2 Super. B Workshop, Orsay, Feb. 15 -18, 2009 17. 5± 0. 2 Blair Ratcliff, SLAC

Progress in DCH R&D activities • Read-out electronics for streamer tube tracking telescope delivered, being commissioned • Read-out electronics for drift tubes setup used to study sense-wire screening with plastic collar delivered and commissioned • Gas system with all needed gas lines being installed • Data acquisition set up for both telescope (drift times) drift tubes (time + charge) Super. B Workshop, Orsay, Feb. 15 -18, 2009 Blair Ratcliff, SLAC

Goals for this Meeting • • Assess status of manpower and roles o New Canadian institutions Define list of tasks needed for the TDR: fill up detailed WBS o Simulations FAST for performance on benchmark channels FULL for background studies Magboltz/Garfield for gas mixture simulation o Detector-related R&D Mechanical quenching Optimizations Cell geometry Gas mixture o Mechanical Engineering o Electronics Super. B Workshop, Orsay, Feb. 15 -18, 2009 Blair Ratcliff, SLAC

Detector Elements-PID-Conveners Vavra & Arnaud Super. B Workshop, Orsay, Feb. 15 -18, 2009 Blair Ratcliff, SLAC

PID Detector (DIRC) • • Hadronic PID System essential for P( , K) > 0. 7 Ge. V/c. (d. E/dx < 0. 7 Ge. V/c) Baseline is to reuse Ba. Bar DIRC barrel-only design. • • Excellent performance to 4 Ge. V/c. Robust operation. Elegant mechanical support. Photon detectors outside field region. Radiation hard fused silica radiators. But. . . PMTs are slow and aging. Need replacement. Large SOB region senstive to backgrounds so volume reduction is desirable. Photon detector replacement • • Baseline. . . Use pixelated fast PMTs with a smaller SOB to improve background performance by ~x 50100 with ~ identical PID performance. Several other photon detector options are considered in the CDR. Super. B Workshop, Orsay, Feb. 15 -18, 2009 Blair Ratcliff, SLAC

Forward PID Option in CDR • Modest solid angle but event acceptance for “veto physics” or decays with multiple particles (e. g. , B Ks. KK) scale much faster than linearly. Physics case needs to be established. • Not just a PID problem. Overall detector optimization required. • • • Adds material before EMC. Takes space from tracking or EMC. Aerogel RICH and Very Fast Cherenkov-based TOF seem plausible. • • • Space requirements. Fast tubes have substantial material. Si. PMs are noisy and neutron sensitive. R&D underway. See Geometry Working Group report Super. B Workshop, Orsay, Feb. 15 -18, 2009 Blair Ratcliff, SLAC

PID Activities in the past 6 months ¡ ¡ New Conveners (Arnaud and Va’Vra) Barrel DIRC: - Restart the cosmic ray telescope (1 mrad tracking, >1. 5 Ge. V muons) - Started to test the FDIRC prototype with new photon detectors. (Six H-8500 Ma. PMTs available, ~380 pixels, s single photon ~ 150 ps) - Developed a new waveform digitizing electronics (BLAB 2 chip). Tests have started in the cosmic ray prototype. ¡ Forward PID: - Aging tests of Si. PMTs with neutrons at KEK - Ongoing aging tests of a MCP-PMT with photons at SLAC Magnetic field tests of MCP-PMTs Beam test of a Aerogel RICH prototype at KEK Beam test of a TOF prototype at Fermilab o Super. B E-mail list: superb-pid@lists. infn. it using INFN sympa Please subscribe to it using either the link https: //lists. infn. it/sympa/info/superb-pid or via the Super. B website: http: //www. pi. infn. it/Super. B/ (login -> click on 'about' in the Navigation menu -> follow link in the 'Mailing lists' box). Tell your friends who might wish to join PID ! Super. B Workshop, Orsay, Feb. 15 -18, 2009 Blair Ratcliff, SLAC

SLAC cosmic ray telescope - our “test beam” for the next year Side 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 Ge. V. Tracking resolution: ~1 mrad. Presently taking data with the FDIRC prototype & the 1 -st Hawaii electronics package. Soon will also include a test of a TOF prototype. Super. B Workshop, Orsay, Feb. 15 -18, 2009 Blair Ratcliff, SLAC

A candidate for the FDIRC/DIRC electronics chain G. Varner, Larry Ruckman, Kurtis Nishima, and Andrew Wong H-8500 Ma. PMT: 64 pixels, 8 x 8 Waveform sampling electronics: 4 BLAB 2 chips / Ma. PMT Waveform sampling rate: ~ 2. 5 GSa/s Timing resolution goal: sfinal ~ 150 ps/photon BLAB 2 ASIC: Initial package: FPGA array Status: - Prepared 12 packages. - Have six H-8500 Ma. PMTs ready. - Complete running system in March Super. B Workshop, Orsay, Feb. 15 -18, 2009 Blair Ratcliff, SLAC

Planned activities for the next 6 months ¡ Barrel DIRC: - Results from FDIRC on the waveform digitizing electronics. - Study the geometry, optics-develop software tools. - Study the glue joints with Ba. Bar muons; prepare for stand-alone bar box tests after Bar boxes are removed. - TDR: - Start developing the engineering concepts - Estimate needed manpower, budget, etc. ¡ Forward PID: - More tests in the cosmic ray telescope & beam. - Decide if there is a viable choice for the photon detector. - Make the physics case for the forward PID. - Decide on technology given the constraints from EMC requirements, tracking and available space. - Understand capability of DCH d. E/dx PID in the forward region. Super. B Workshop, Orsay, Feb. 15 -18, 2009 Blair Ratcliff, SLAC

Detector Elements-EMC-Convener Hitlin Super. B Workshop, Orsay, Feb. 15 -18, 2009 Blair Ratcliff, SLAC

EMC Ba. Barrel 5760 Cs. I(Tl) Crystals Essential detector to measure energy and direction of g and e, discriminate between e and p, and detect neutral hadrons. Baseline • • • Ba. Bar barrel crystals can be reused. Most expensive detector component. Backgrounds dominated by radiative Bhabhas. IR shielding design is crucial. Baseline is to retain barrel geometry and photo-diode readout. Due to decreased boast, will shift interaction point wrt normal crystal gap from -5 to +5 cm. Overall increase in Barrel coverage from 79. 5% to 84. 1%. Forward Endcap EMC • Inner Ba. Bar Crystals are radiation damaged. Need replacement. • At forward angles in Super. B, Cs. I(Tl) is too slow (occupancy) and radiation soft. • Propose LYSO. Option for Backward Endcap • • • Best possible hermiticity important for fully inclusive decays and decays with neutral energy. 4. 5% of solid angle is in backward endcap. But DCH material, DIRC bars, and DCH readout unavoidable. Physics gains need careful assessment. CDR considers veto device. Super. B Workshop, Orsay, Feb. 15 -18, 2009 Blair Ratcliff, SLAC

The Forward EMC Endcap ¡ ¡ The higher rates and radiation dose of Super. B motivates replacing the BABAR Cs. I(Tl) endcap with a faster, denser, more radiation hard version. The proposed design uses LYSO crystals with transverse dimensions of ~1 Moliere radius (~2. 5 cm) Optimization of crystal sizes and the effect of the support structure on performance is proceeding Ren-yuan Zhu et al. have been working with suppliers to improve LYSO performance and establish manufacturing protocols l Work has been primarily with SIPAT SIC, which supplied L 3, BABAR, and CMS, is now providing full size LYSO l Saint Gobain is also a supplier l l ¡ Hamamatsu now has 10 mm x 10 mm APDs (CMS used 2@5 mm x 5 mm), which appear to be cost-effective Have quotes for large quantities of LYSO and APDs Super. B Workshop, Orsay, Feb. 15 -18, 2009 Blair Ratcliff, SLAC

Forward Endcap, continued ¡ Two designs are under consideration l Full replacement of the existing endcap with LYSO ¡ ¡ l Reuse of existing carbon fiber structure ¡ ¡ ¡ l New carbon fiber support structure Frees 10 cm for a forward PID system Use four LYSO crystals in each Cs. I(Tl) compartment Option: retain three outer rings as Cs. I(Tl) Occupies the existing volume: no space created forward PID The choice between the two must be made globally ¡ ¡ ¡ Cost Physics performance as a calorimeter Motivation forward PID Studies with the fast MC tool are a high priority Geometry Working Group Super. B Workshop, Orsay, Feb. 15 -18, 2009 Blair Ratcliff, SLAC

Beam test ¡ Much of the activity is organized around preparations for a beam test l It may be necessary to have tests at two sites to span the required energy range with electrons, pions and tagged photons l Test would employ 25 LYSO crystals, surrounded by existing CLEO Cs. I(Tl crystals ¡ Funding needed to place the orders l Existing CMS APD modules will be used for readout l Exploring a portable DAQ system based on a simplified CMS system ¡ We aim for a beam test in (early) 2010 Super. B Workshop, Orsay, Feb. 15 -18, 2009 Blair Ratcliff, SLAC

Rear endcap ¡ ¡ Early studies indicate that even a crude calorimeter closing up the rear solid angle pays dividends in S/N for missing energy signatures Preliminary design uses Pb plates and scintillating tiles with fiber readout to Si. PMs Work is needed on detailed mechanical design for the highly constrained environment within the DIRC tunnel Questions have been raised about Si. PM tolerance for neutrons ¡ This is under study – preliminary conclusion is that this may be OK in an angle crossing (no B 1’s) IR Super. B Workshop, Orsay, Feb. 15 -18, 2009 Blair Ratcliff, SLAC

Detector Elements-IFR-Convener Calabrese Super. B Workshop, Orsay, Feb. 15 -18, 2009 Blair Ratcliff, SLAC

IFR • • • Provides discrimination between m and charged hadrons ( & k). High m ID efficiciency and good hadron rejection efficiencies are both important. Good efficiency as a KL veto is helpful in analysis of final states with missing u energy (e. g. , B mu(g) ). Mainly depends on EMC and energy deposited in inner material. Baseline • • Add iron to Ba. Bar stack to improve m ID. 7 -8 detection layers. Re-use Ba. Bar steel (still to be fully assessed) Keep longitudinal segmentation in front of stack to retain KL ID capability. Baseline uses Minos style scintillation bars. Super. B Workshop, Orsay, Feb. 15 -18, 2009 Blair Ratcliff, SLAC

IFR status: ongoing activities • Detector R&D: – efficiency and time resolution studies with more (Φ=1 mm for the moment) fibers per scintillator, with 2 x 2 mm 2 Si. PM – Optimization of mechanical coupling: WLS/clear fibers and fiber/photodetectors – 1. 2 mm and clear fibers ordered, expected end February – Hamamatsu MPPC Array 1 x 4 1 x 1 mm 2 and 3 x 3 mm 2 ordered • FE electronics: – Optimization of FE amplifiers: gain x Band. Width and noise studies super. B IFR - work in progress • Detector and background simulation – absorber optimization – reuse of Ba. Bar flux return • Detector Design/Mechanics – Study of the detector layout – Study of the Prototype layout Super. B Workshop, Orsay, Feb. 15 -18, 2009 Blair Ratcliff, SLAC 33

Goals for this meeting • Detailed planning of the prototype activities: mechanical design electronics development test-beam • Understand from background simulation group when the neutron rate will be available. • TDR phase preparation check/review the plans set the milestones address manpower needs Super. B Workshop, Orsay, Feb. 15 -18, 2009 Blair Ratcliff, SLAC 34

Plans for the TDR ¡ Construction and test of a prototype to measure/confirm performance ¡ Final layout of the single detector module: scintill + WLS fiber + photodetector based on R&D and prototype test results l l l ¡ Mechanics l l ¡ Number of fibers per scint. bar Kuraray / Saint-Gobain and diameter Type of photodetectors : Si. PM or MPPC, active surface dimensions understand if we will reuse the Babar flux return or we need to build a new one module engineering, layout and assembling Development and test of the Front End Electronics: l l l amplifier discriminators TDC Super. B Workshop, Orsay, Feb. 15 -18, 2009 Blair Ratcliff, SLAC 35

Electronics, Trigger and DAQConveners, Breton & Marconi Super. B Workshop, Orsay, Feb. 15 -18, 2009 Blair Ratcliff, SLAC

Electronics, Trigger & DAQ A new overall design document has been prepared for discussion at this meeting. Will be presented in the next session. Electronics, Trigger and DAQ for Super. B. Editors: D. Breton (LAL Orsay) and U. Marconi (INFN Bologna). This document aims at defining plans for future activities towards the TDR. It contains information we presented and collected during the last meetings dedicated to electronics, trigger and DAQ. Information recognized as relevant to constraint the overall architecture of the experiment is listed in the following paragraphs. ………………………… Super. B Workshop, Orsay, Feb. 15 -18, 2009 Blair Ratcliff, SLAC

Detector Geometry Working Group Rama/Stocchi Super. B Workshop, Orsay, Feb. 15 -18, 2009 Blair Ratcliff, SLAC

Detector Geometry Working Group ¡ Critically examine open questions in CDR design. ¡ Goals are to l l l ¡ Task force chairs are Matteo Rama and Achille Stocchi. Will interact broadly with the collaboration and will l ¡ Study physics tradeoffs of detector with different forward and backward options using realistic simulation models. Be able to finalize overall global geometry within ~ 1 year Define subsystem technologies ASAP Provide input to proto-technical board. Report progress broadly at task force meetings, R&D detector meetings, and general collaboration meetings, and in written reports. First meeting Dec. 15, 2008 at the Frascati Computing Workshop. Status will be discussed in next session! Super. B Workshop, Orsay, Feb. 15 -18, 2009 Blair Ratcliff, SLAC

Computing Super. B Workshop, Orsay, Feb. 15 -18, 2009 Blair Ratcliff, SLAC

Computing ¡ Computing “in” the TDR will be based on Babar+LHC experience: solvable problem l ¡ Fully detailed Computing TDR may come a bit later than the detector TDR, maybe 2011 -12 Computing “for” the TDR is essential from now to the TDR l Collaborative tools ¡ l Web, Code/document repository, Wiki, mailing lists, etc. Simulation tools ¡ ¡ ¡ Physics, Background, Detector optimization. Reuse Ba. Bar code when possible Progress on both fast and full simulation. l l l Fast Simulation aimed at the physics and detector needs. Full Geant 4 simulation targeted at machine/detector backgrounds To be discussed in joint Detector/Computing session on Tues. Super. B Workshop, Orsay, Feb. 15 -18, 2009 Blair Ratcliff, SLAC

Detector Related Workshop Sessions 42 Super. B Workshop, Orsay, Feb. 15 -18, 2009 Blair Ratcliff, SLAC

Focus of Workshop Define/refine • Global System Issues • Geometry Working Group • Steps needed to reach final subsystem design • • • Design R&D Beam Tests Organization, Manpower, Institutions Costs Milestones • Interfaces, system representatives, and tools • Simulation for Physics studies and MDI • Computing • Electronics/DAQ/Trigger • Design and Documentation Now Proposal to the Italian Government (2009) TDR (two years). Need active planning and execution! • Groups continue to grow, but more active people needed in all areas. Please join in and bring your colleagues! 43 Super. B Workshop, Orsay, Feb. 15 -18, 2009 Blair Ratcliff, SLAC