1 / 16

The LHCb Upgrade

The LHCb Upgrade. Outline. Introduction to LHCb Advantages, challenges & limitations The LHCb trigger Introducing the LHCb upgrade Aims & time scale The upgraded trigger The upgrade LHCb detector Implications on the sub-systems Conclusion. LHCb – a brief introduction.

zephr-cochran
Télécharger la présentation

The LHCb Upgrade

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The LHCb Upgrade

  2. Outline • Introduction to LHCb • Advantages, challenges & limitations • The LHCb trigger • Introducing the LHCb upgrade • Aims & time scale • The upgraded trigger • The upgrade LHCb detector • Implications on the sub-systems • Conclusion L. Eklund, University of Glasgow

  3. LHCb – a brief introduction • Precision Flavour Physics at the LHC • CP violation and rare decays • Forward spectrometer geometry • Covers 2 % of the solid angle, but 27 % of the bb-pairs Muon Spectrometer Tracking System Calorimeters Vertex Detector Particle Identification L. Eklund, University of Glasgow

  4. Challenging the Standard Model • Looking for deviations • Probe ‘box’ or ‘loop’ processes • Precise SM predictions • Compare measurements that are (in)sensitive to BSM physics. • CKM angle γ in Bs->Ds K • CKM angle γ in Bd,s->ππ, KK • Sensitivity to mass scales far beyond direct searches • Precision measurement • Statistics! • Systematics! L. Eklund, University of Glasgow

  5. Experimental Edge and Challenge • LHCb has access to an unprecedented statistics • Challenging environment: hadron collider • Trigger & event selection Cross sections and 2011 yields in the detector acceptance PLB 694 (2010) 209-216 Charm cross-section @ 7 TeV: σacc = 1.2 mb LHCb-CONF-2010-013 pairs produced in the LHCb acceptance L. Eklund, University of Glasgow

  6. Current Operational Conditions • Currently: L = 4 x 1032 cm-2s-1 @ 50 ns bunch spacing & 8 TeV • Design value: L = 2 x 1032 cm-2s-1 @ 25 ns & 14 TeV • Interactions per bunch crossing: 1.5-2 • Design value: 0.4 • Luminosity Levelling: constant during the fill • LHCb is not limited by LHC L. Eklund, University of Glasgow

  7. Goals and Timeline • Increase the annual signal yield compared to 2011 • 10 times for muonic channels • 20 times for hadronic channels • Operate at instantaneous luminosity exceeding 1033 cm-2s-1 • Collect 50 fb-1 of integrated luminosity LHCb Upgrade installation LHCb Upgrade design & construction 2010 – 2012 collect 2.5 fb-1 @ 7-8 TeV 2015-2017 collect > 5 fb-1 @ 13-14 TeV 2019-2022 collect > 5 fb-1/year @ 13-14 TeV LS2: Injector and LHC Phase I GPD upgrades LS1: splice repairs L. Eklund, University of Glasgow

  8. LHCb Trigger Scheme • L0 H/W trigger • 4 μs latency in FE electronics • HLT S/W trigger • Implemented in CPU farm • Luminosity upgrade • Event yields saturate • Need full event information at L0 4.5 KHz L. Eklund, University of Glasgow

  9. Upgraded Trigger Scheme Optional Low Level Trigger throttle 1-40 MHz 40 MHz HLT Tracking and vertexing Impact Parameter cuts Inclusive/Exclusive selections 20 kHz to tape L. Eklund, University of Glasgow

  10. Challenge: Data Rates • Full detector read-out @ 40 MHz • Current Vertex Locator: 225 G samples/s (analogue) • Upgraded Vertex Locator: 2-3 Tbit/s (digital) • On-detector zero-suppression • Replace (almost) all FE electronics • Massive read-out infrastructure L0 front-end 1 MHz TELL1 40 MHzfront-end 40 MHz TELL40 L. Eklund, University of Glasgow

  11. Vertex Locator (Velo) Upgrade • The cooling challenge • Currently TPG subsrate • Diamond substrate? • Micro-channel cooling? • Complete replacement of modules • Large fraction of the infrastructure remains • E.g. cooling, motion, vacuum, … • Two options investigated • Strips: R-Φ geometry with reduced pitch • Pixel based on TimePix family of chips • Radiation Hardness • Up to 3 x 10^15 1MeV neq/cm2 L. Eklund, University of Glasgow

  12. Tracker Upgrade • TT tracking station • Currently: Silicon strip • Upgrade Redesigned silicon strips • Share FE chip with strip Velo • Current main tracker • Inner tracker: Silicon strip • Outer tracker: Straw tubes • Two options investigated • Silicon strip inner tracker + Straw tube outer tracker • Scintillating fibre central tracker + Straw tube outer tracker L. Eklund, University of Glasgow

  13. RICH Upgrade • RICH 1 and RICH 2 detectors remain • Remove aerogel radiator due to occupancy • Replace photo detectors with MaPMTs with 40 MHz read out • Possible addition (non-baseline): TORCH = DIRC + ToF • Quarts radiator with MCP photon detectors • 40 ps time resolution K-π separation vsp performance TORCH: Time Of internally Reflected Cherenkov Light L. Eklund, University of Glasgow

  14. Calorimeter & Muon Upgrade • Already used in L0 trigger • HCAL & ECAL: Keep detector modules and PMTs • Reduced PMT gain, increased FE amplification • Modified 40 MHz FE electronics • Muon Spectrometer: Keep chambers & FE electronics • Remove first station (M1) • High occupancy performance and aging under study Calorimeter FE ASIC prototype L. Eklund, University of Glasgow

  15. Performance Benchmarks Precision Measurements: Systematic uncertainties are the aim of the game ! L. Eklund, University of Glasgow

  16. Summary: The LHCb Upgrade • LHCb: precision flavour physics at LHC • Two years of successful operation and data analysis • Not limited by the LHC luminosity • Upgrade will read out the full detector @ 40 MHz • Installation during LHC LS2 (2018) • Data rates & read-out major challenge • Major impact on most detector systems • Active R&D since several years • EoI, LoI endorsed by LHCC • Framework TDR submitted • To reach our physics goals: • Large statistics and small systematics L. Eklund, University of Glasgow

More Related