The CMS Phase II Upgrade

  • Thomas Owen JamesEmail author
Part of the Springer Theses book series (Springer Theses)


In order to fully exploit the scientific potential of the LHC, it is planned to operate the machine at a higher average instantaneous luminosity from 2026 onwards, following a 30 month-long shutdown. During this shutdown, parts of the CMS detector will be replaced and upgraded. A new silicon tracker will be installed which must maintain performance under the increased luminosity conditions. This new tracker will read out information to the Level-1 trigger at the LHC bunch crossing rate of 40 MHz. In order to do this, novel tracking modules hosting a pair of closely spaced silicon sensors bonded to a single read-out ASIC are being produced. Pairs of clusters across the sensors can be correlated to identify high transverse momentum track candidates. Only these will be sent to the Level-1 trigger, allowing for 40 MHz readout.


  1. 1.
    Apollinari G et al (2015) High-Luminosity Large Hadron Collider (HL-LHC): preliminary design report, Dec 2015, CERN, Geneva.
  2. 2.
    CMS Collaboration (2017) The Phase-2 upgrade of the CMS tracker, Jul 2017, technical report CERN-LHCC-2017-009Google Scholar
  3. 3.
    CMS Collaboration (2015) Technical proposal for the Phase-II upgrade of the CMS detector, Jun 2015, technical report CERN-LHCC-2015-010Google Scholar
  4. 4.
    CMS Collaboration, The Phase-2 upgrade of the CMS endcap calorimeter, technical report CERN-LHCC-2017-023Google Scholar
  5. 5.
    Abbaneo D (2016) Performance requirements for the phase-2 tracker upgrades for ATLAS and CMS. EPJ Web Conf 127:00002. Scholar
  6. 6.
    CMS Collaboration (2017) The Phase-2 upgrade of the CMS L1 trigger interim technical design report, Sep 2017, technical report CERN-LHCC-2017-013Google Scholar
  7. 7.
    Bethe HA (1952) Molière’s theory of multiple scattering. Phys Rev 89(6).
  8. 8.
    Patrignani C et al (Particle Data Group) (2016) The review of particle physics. Chin Phys C 40:100001Google Scholar
  9. 9.
    Pesaresi M, Hall G (2010) Simulating the performance of a pT tracking trigger for CMS. JINST 5:C08003. Scholar
  10. 10.
    Hall G, Raymond M, Rose A (2010) 2-D PT module concept for the SLHC CMS tracker. JINST 5:C07012. Scholar
  11. 11.
    Pesaresi M (2010) Development of a new Silicon Tracker for CMS at Super-LHC, Jan 2010, Imperial College London PhD thesis, CERN-THESIS-2010-083Google Scholar
  12. 12.
    Moreria P et al (2009) The GBT project, Sep 2009, Topical Workshop on Electronics for Particle Physics, Paris, France, pp 342–346.
  13. 13.
    Raymond M, Braga D, Ferguson W et al (2012) The CMS binary chip for microstrip tracker readout at the SLHC. JINST 7:C01033. Scholar
  14. 14.
    Braga D, Hall G, Jones L et al (2012) CBC2: a microstrip readout ASIC with coincidence logic for trigger primitives at HL-LHC. JINST 7:C10003. Scholar
  15. 15.
    Caponetto L, Viret S, Zoccarato Y (2015) CIC1 technical specification, Dec 2015, Institut de Physique Nucléaire de Lyon (FR).
  16. 16.
    Ceresa D et al (2014) Macro Pixel ASIC (MPA): the readout ASIC for the pixel-strip (PS) module of the CMS outer tracker at HL-LHC. JINST 9:C11012. Scholar
  17. 17.
    Moreira P (2017). LpGBT specification document, Jul 2017.
  18. 18.
    Soós C et al (2017) Versatile link PLUS transceiver development. JINST 12:C03068. Scholar
  19. 19.
    K\(\ddot{\text{o}}\)nig A, Bergauer T, Dragicevic M, Humann B, (2017) Field effect transistor test structures for p-stop strip isolation studies. JINST 12:C02067.
  20. 20.
    Grossmann J (2017) PS-module prototypes with MPA-light readout chip for the CMS tracker phase 2 upgrade. JINST 12:C02049. Scholar
  21. 21.
    Jansen H et al (2016) Performance of the EUDET-type beam telescopes, May 2016, EPJ Techniques and Instrumentation 3.
  22. 22.
    Obermann T et al (2014) Implementation of a configurable FE-I4 trigger plane for the AIDA telescope. JINST 9:C03035. Scholar
  23. 23.
    Cussans D (2009). Description of the JRA1 Trigger Logic Unit (TLU), Sep 2009, v0.2c, EUDET-Memo-2009-4.
  24. 24.
    Vichoudis P et al (2010) The Gigabit Link Interface Board (GLIB), a flexible system for the evaluation and use of GBT- based optical links. JINST 5:C11007.
  25. 25.
    Pesaresi M et al (2015) The FC7 AMC for generic DAQ & control applications in CMS. JINST 10:C03036. Scholar
  26. 26.
    Xilinx Inc (2017) 7 series FPGAs data sheet: overview, Aug 2017, product specification, DS180 (v2.5).
  27. 27.
    PICMG (2003) AdvancedTCA Short Form Specification, Jan 2003.
  28. 28.
    Aggleton R et al (2017) An FPGA based track finder for the L1 trigger of the CMS experiment at the High Luminosity LHC. JINST 12:P12019. Scholar

Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Department of PhysicsImperial College LondonLondonUK

Personalised recommendations