LHCb Future Upgrade Alessandro Cardini INFN Cagliari LHCb
LHCb Future Upgrade Alessandro Cardini / INFN Cagliari
LHCb Upgrade fase 1 b & beyond Manchester, 6+7 aprile 2016 CSN 1, 08 JUL 16 A. Cardini / INFN Cagliari 2
Future Upgrade Roadmap Interessi italiani – in sinergia con attività RD_FASE 2 – – CSN 1, 08 JUL 16 Tracking 4 D (fast timing pixels sensors) Track-trigger u. Rwell detectors per regioni interne muon system Improved muon station shielding (1. 7 m thick iron shielding) A. Cardini / INFN Cagliari 3
4 D Fast Tracking at HL-LHC Bologna, Cagliari, Ferrara, Milano
Tracking at HL-LHC High-Luminosity LHC phase: 5× 1034 cm-2 s-1 with leveling (ATLAS and CMS) and 1 -2× 1034 cm-2 s-1 for LHCb Average number of visible interactions ~140 (~40 for LHCb) Precise tracking will be extremely challenging The use of precise timing information can dramatically improve tracking in the HL-LHC high pile-up conditions Simplification of pattern recognition (increased speed) Significant reduction in ghost tracks CSN 1, 08 JUL 16 A. Cardini / INFN Cagliari 5
Proposed activity We plan to build an innovative radiation hard time-tagging pixel detector and a fast real-time tracking system This will enable LHCb to run at the luminosity foreseen for the HL- LHC phase and exploit the full potential for flavor We will maximize synergies with other experiments In the first period: Production of new 3 D sensors with optimized geometry for timing (G. F. Dalla Betta, funded production lot at FBK for RD_fase 2) Use NA 62 Gigatracker TDCpix ASIC bump-bonded to the sensor (flip -chip bonding) Use NA 62 Gigatracker off-detector read-out electronics and DAQ (replicate read-out boards and DAQ system) CSN 1, 08 JUL 16 A. Cardini / INFN Cagliari 6
Online Downstream Reconstruction Pisa group proposal for LHCb Phase IB
Downstream tracking in LHCb m (Me. V) ��-12(10 s) Bd 5300 1. 5 KS 500 90 �� 1120 260 KL 50000 K+ 490 10000 + �� 1190 80 Long tracks (L) include VELO, TT, and T-stations Downstream tracks (D): just TT and T-stations: accept long-lived particles (>10 ps) Downstream tracking not foreseen in trigger upgrade TDR: It could very well be that after LS 2 what is not reconstructed online will not be available to the analyst (TURBO does not keep raw data) -> This impacts efficiency for KS , KL , �� … Es. KS: NDD~3 x NLL , KL: NDD~5 x NLL (albeit with 50% worse resolution) 8
Proposed Implementation Based on the results of the current R&D project ‘RETINA’ in CNS 5 FPGA-based real-time track reconstruction at 40 MHz with low-latency Very encouraging early results show this to be feasible for LHCb 1 B We are discussing the implementation with LHCb management and subsystems experts Positive initial feedback received Plan to insert the new device in the Event Builder -> make downstream tracks available upfront (at the very start of HLT 1) We are collaborating in defining size and connectivity of the device We are NOT asking the CSN 1 for any resource assignment at this time Will be back to CSN 1 with a request after a detailed plan has been drafted 9
LABORATORI NAZIONALI DI FRASCATI www. lnf. infn. it µ-RWELL for high rate environment G. Bencivenni (a), R. de Oliveira (b), M. Gatta (a), G. Morello (a), A. Ochi (c) M. Poli Lener (a) LNF-INFN, Italy, (b) CERN, Meyrin, Switzerland, (c) Particle Physics Group, Department of Physics, Kobe University, Kobe, Japan
The µ-RWELL architecture The µ-RWELL detector is composed by two elements: the cathode and the µ-RWELL_PCB. Drift/cathode PCB The µ-RWELL_PCB is realized by coupling: 1. a “suitable WELL patterned kapton foil as “amplification stage” Well pitch: 140 µm Well diameter: 70 -50 µm Kapton thickness: 50 µm Copper top layer (5µm) 2. a “resistive stage” for the discharge DLC layer (0. 1 -0. 2 µm) suppression & current evacuation R 50 -100 MΩ/□ 2 i. “Low particle rate” (LR) << 100 k. Hz/cm : single resistive layer with edge grounding (CMS-phase 2 upgrade - SHIP) 1 2 3 Rigid PCB readout electrode ii. “High particle rate” (HR) > 1 MHz/cm 2: double resistive layers with “through vias” grounding (MPDG_NEXT- LNF & LHCbmuon upgrade) µ-RWELL PCB G. Bencivenni et al. , 2015_JINST_10_P 02008 3. a standard readout PCB CSN 1, 08 JUL 16 A. Cardini / INFN Cagliari 11
2017 R&D program 1. Design, engineering and construction of µ-RWELL prototypes (M 2 R 1 size: 30 x 25 cm 2 with pad size of 0. 63 x 0. 77 cm 2) following the double resistive layout scheme 2. External PCB Companies will be involved for the prototypes construction 3. Gain and rate capability will be measured with X-Rays @ LNF 4. Efficiency and time resolution will be measured in a test beam @ CERN CSN 1, 08 JUL 16 A. Cardini / INFN Cagliari 12
Richieste Finanziarie Future Upgrade • Si tratta di richieste poco più che simboliche per fare partire, nell’ambito degli R&D già in corso, alcuni studi specifici per il Future Upgrade di LHCb • Inserite nei Preventivi 2017 • Tracking 4 D (Ferrara): ~18 ke per bump-bonding sensore 3 D (ottimizzato per elevate risoluzioni temporali e prodotto in ambito RD_FASE 2) su chip readout NA 62 • u. RWELL (LNF): ~10 ke per sviluppo rivelatore con piano resistivo ottimizzato per operare alla rate prevista in M 2 R 1 in LHCb@HL CSN 1, 08 JUL 16 A. Cardini / INFN Cagliari 13
Conclusione • La Collaborazione LHCb ha cominciato attivamente a studiare un ulteriore upgrade dell’esperimento • Interesse della collaborazione italiana per Future Upgrade con R&D sinergiche con attività ongoing di RD_FASE 2 e altri progetti INFN CSN 1, 08 JUL 16 A. Cardini / INFN Cagliari 14
Backup Slides CSN 1, 08 JUL 16 A. Cardini / INFN Cagliari
Improved Muon System Shielding (@LS 3) Reuse of the OPERA magnets iron slabs CSN 1, 08 JUL 16 A. Cardini / INFN Cagliari 16
CSN 1, 08 JUL 16 A. Cardini / INFN Cagliari 17
Physics opportunities • Charmless B decays to CP eigenstates with neutral kaons, “gold-plated modes” (B→ KSKS , B→ KSKSKS, B→eta’ KS, B→phi KS, B→omega KS ) • Decays with baryons (�� ’s) in the final state • SU(2) partners of already well-measured channels (often involve a Ks) • LHCb has current best limit on Ks → µµ, despite 1% efficiency (3 x prescale) –> this can be improved by a large factor. • Charm decays: SU(2) and SU(3) analysis of hadronic decays, and study of SU(3) symmetry breaking; Ds→ KSpi+ versus D+→ KSK+, and D→ KSKS, D+→ KS pi+ • Hidden sector WIMP DM and Majorana neutrinos: in LHCb limits on hidden sector bosons (e. g. , in B -> K* A, with A -> mu+ mu-) or Majorana neutrinos (e. g. , B+ -> N mu+ and D(s)+ -> N mu+ , with N -> pi+ mu-) would be extended above the current ~10 ps limit. 18
Main features of the µ-RWELL detector the µ-RWELL is intrinsically a spark protected detector and it has a very simple construction procedure: only two mechanical components µ-RWELL_PCB + cathode no critical & time consuming assembly steps: ü no gluing ü no stretching ü easy handling no stiff & large frames suitable for large area with PCB splicing technique (more simple than GEM) cost effective: 1 PCB r/o, 1 µ-RWELL foil, 1 DLC, 1 cathode and low man-power easy to operate: very simple HV supply 2 independent channels or a trivial passive divider (3 GEM detector 7 HV channels)
Layout of the µ-RWELL_PCB for High Rate tested - to be engineered ( R&D to be done) Copper layer 5 µm 1 Kapton layer 50 µm DLC-coated kapton base material: DLC layer 0. 1 – 0. 2 µm (10 – 100 M /�) 2 3 2 nd resistive kapton layer ( 25 µm thick) with 1/cm 2 “through vias” density, with a suitable resistance. DLC-coated kapton base material 2 nd resistive kapton layer solder resist (12 µm) on pad/strips readout on standard PCB (1 – 1, 6 mm) “through vias” for grounding 4 CSN 1, 08 JUL 16 DLC-coated base material after copper and kapton chemical etching (the WELL amplification stage) A. Cardini / INFN Cagliari 20
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