CMS Upgrades CMS Plans up to 2020/ 2030? Dan Green Fermilab - PowerPoint PPT Presentation

CMS Upgrades CMS Plans up to 2020/ 2030? Dan Green Fermilab 06/05/13 U of D0 – CMS Upgrades 1

Why Upgrade? ● The LHC will be the only factory in HEP for W, Z, t and H production for a long time ● To further the energy frontier we need to upgrade the detectors and the LHC ■ LS1 – now, 8->14 TeV ■ LS2 – 300 fb-1 by 2012, 2xLo ■ LS3 – 3000 fb-1 by 2030, 2x Lo 06/05/13 U of D0 – CMS Upgrades 2

CERN/LHC Planning ● Long shutdowns in 2013 8 TeV 14 TeV and 2017 ● Much detail on the 5Lo CERN site 06/05/13 U of D0 – CMS Upgrades 3

Projected Luminosity ● Long term plan is 3 ab-1 ● Lumi, PU Up to 5x design 06/05/13 U of D0 – CMS Upgrades 4

Present CMS 06/05/13 U of D0 – CMS Upgrades 5

CMS Public ● https://cms.web.cern.ch/org/upgrades ● First do no harm ■ Always keep the ability to use the LHC ■ CMS is to be always a running experiment ■ Plan upgrades in synch with LHC upgrades and schedule. ● Upgrade is in 2 phases – as driven by CERN and the LHC machine. Focus on Phase 1 construction + Phase 2 R&D at the moment 06/05/13 U of D0 – CMS Upgrades 6

Run I Issues ● Tracking ■ Beam pipe, b tags, material ■ Tracker cooling – raddam, conversions ■ Beam gas and pixel readout ● ECAL ■ Crystal raddam ■ Nuclear counter – APD ■ Shaping and OOTPU – play against dE 06/05/13 U of D0 – CMS Upgrades 7

Issues - II ● HCAL ■ HPD – HV, aging, B field ■ HF – PMT Cerenkov, punchthrough ■ Scint raddam ■ PF jets and HF – tracking coverage ● Muons ■ DT crate access ■ ME4-2, ME1-1, RPC – complete system 06/05/13 U of D0 – CMS Upgrades 8

New Beampipe ● Thinner and Smaller r b tag ● 4 layers robust ● Increased lever arm 06/05/13 U of D0 – CMS Upgrades 9

New Pixel Layout ● 4 layers ● Gas cooling ● Services at larger |y| ● Pixel design removable flexibility 06/05/13 U of D0 – CMS Upgrades 10

Pixel Readout DT ● Beam – gas ● High L ● New RO chip ● Column readout ● ->DT, 20% ● Loss at 5Lo 06/05/13 U of D0 – CMS Upgrades 11

Pixel Raddam ● Phase 2 R&D ● Si ? ● Note noise is ~ few e ● SN > 20x ● Falls to 10x (D0, CDF?) 06/05/13 U of D0 – CMS Upgrades 12

Top Pair Benchmark signal fakes ● Maintain CMS physics power into the future ● Studies for Phase 1, 2Lo 06/05/13 U of D0 – CMS Upgrades 13

Pixel/Tracker b Tag ● Phase 1 b tag ● Improved tag eff 06/05/13 U of D0 – CMS Upgrades 14

Present Tracker – Si Strips Major system replacement in Phase 2. Liquid->gas cooling. DC-DC converters. Track triggering capability 06/05/13 U of D0 – CMS Upgrades 15

Tracker Material ● Too much stuff ● Power ■ dc->dc ● Cooling ■ CO2 gas ● Services at large |y| 06/05/13 U of D0 – CMS Upgrades 16

Tracker Cooling ● Cool to design values for 14 TeV in 2015 ● Needed to freeze out raddam induced impurities 06/05/13 U of D0 – CMS Upgrades 17

L1 Tracker Trigger ? ● Current CMS Trigger uses only calorimeter and muon at L1 ● Trigger will improve granularity and connectivity in Phase 1 – but.... ● Phase 2 R&D 06/05/13 U of D0 – CMS Upgrades 18

Phase 1 Pixel Schedule ● Pixels are Removable ● Gives CMS great flexibility ● Schedule for 2017 06/05/13 U of D0 – CMS Upgrades 19

HCAL – Depth Segments ● HCAL depth ● Run I – none (unlike D0) ■ Cost ■ Space ● Advent of SiPM 06/05/13 U of D0 – CMS Upgrades 20

Raddam - Scint/SiPM ● Inner HE: scint → ? quartz? Depth segments. ● SiPM have good raddam properties 06/05/13 U of D0 – CMS Upgrades 21

HCAL – Depth and PU ● Depth has better e isolation with PU ● Better fake jets, correct e/h Jet leakage ● Raddam weight Phase 1 06/05/13 U of D0 – CMS Upgrades 22

HCAL - SiPM ● Enables jet depth development ● Better gain, QE ■ Muon ID ■ S/B – depth ■ Timing – PU ● Faster rise time 06/05/13 U of D0 – CMS Upgrades 23

HO SiPM ● HO Installed now ● HPD->SiPM ● Synergy With ILC R&D 06/05/13 U of D0 – CMS Upgrades 24

HCAL Timing ● Scint flours slow ● SiPM gives much more gain, QE ● Enables timing – PU , backgrounds 06/05/13 U of D0 – CMS Upgrades 25

HCAL - FEE ● SiPM ● TDC ● uTCA ■ Improved L1 ■ More connectivity 06/05/13 U of D0 – CMS Upgrades 26

Depth and Isolation ● Depth gives better ISO in high PU ● Use first Thin HCAL Segment only 06/05/13 U of D0 – CMS Upgrades 27

HF and VBF ● VBF isolates WW scatt ● Does H(125) unitarize? ● Need “tag Jets” in HF ● Tracking for PF? HF, y = (3,5) ● Robust? For PU? 06/05/13 U of D0 – CMS Upgrades 28

HF – Raddam, Phase 2 ● HF quartz 30x the dose here ● Need PF With PU Tracking? Timing? R&D now 06/05/13 U of D0 – CMS Upgrades 29

ME42 - Completion ● Descoped In Run 1 ● Now restoring “Run I” CMS design 06/05/13 U of D0 – CMS Upgrades 30

ME Trigger and ME4/2 ● Many low Pt muons from b → u+v+c decays ■ Lever arm ■ redundancy 06/05/13 U of D0 – CMS Upgrades 31

ME1-1 Completion ● RDMS ● Electronics ■ Ganged ■ Hurts trigger ■ restoring 06/05/13 U of D0 – CMS Upgrades 32

MB – DT Trigger ● DT – MB ■ On DT ■ Move off ● Better granularity ● Improved Trigger purity 06/05/13 U of D0 – CMS Upgrades 33

RPC - Completion ● Descoped in Run 1 ● Being restored now 06/05/13 U of D0 – CMS Upgrades 34

Trigger Upgrade - P1 ● Trigger rates are driven by the increase in luminosity, the center-of-mass energy, and by higher PU ● Mitigate by improving e/γ isolation, τ id, muon pT resolution, muon isolation, jets with PU subtraction, and L1 menu sophistication ● Increase system flexibility with high bandwidth optical links and large FPGAs, and standardize on μTCA telecom standard ● Build and commission upgrade in parallel with current trigger system to safeguard physics, decouple from LHC schedule ● Overall design: ■ Two-layer calorimeter trigger with tower-level precision and PU subtraction ■ Integrated muon trigger combining all 3 muon systems in track-finding ■ Global Trigger not limited by number of triggers (>128) and offering more sophisticated conditions (e.g. invariant mass) 06/05/13 U of D0 – CMS Upgrades 35

Trigger Upgrades e tau ● uTCA ● Algorithm work 06/05/13 U of D0 – CMS Upgrades 36

Trigger Menu – 2 x 10^34 ● Isolated single leptons ● Dileptons ● “SUSY” 06/05/13 U of D0 – CMS Upgrades 37

Phase 1 “Cost” ● CERN “Metric” ■ No labor ■ No contingency ● US in “CD-n” metric 06/05/13 U of D0 – CMS Upgrades 38

CMS Upgrades - Summary ● LS1 is presently in train. ● Much of Phase 1 has been vetted ■ Technical Proposal – LHCC ■ Then subsystem TDR ■ Pixel, HCAL and Trigger TDR approved ■ Funding needs to be secured...... ● Phase 2 R&D is ongoing. Upgrades will be more radical in Phase2. 06/05/13 U of D0 – CMS Upgrades 39

Beamline Detectors ● Higher L ● Protect CMS ● Feedback To LHC 06/05/13 U of D0 – CMS Upgrades 40

HCAL - QIE ● Multi-range Charge sample ● Add TDC timing 06/05/13 U of D0 – CMS Upgrades 41

Depth and PU ● PU is soft ● Use HCAL depth 06/05/13 U of D0 – CMS Upgrades 42

Present Tracker 06/05/13 U of D0 – CMS Upgrades 43

Tracker - Upgraded 06/05/13 U of D0 – CMS Upgrades 44

Punchthrough and HF ● High E shower Cerenkov in PMT ■ Redundant ■ Readout ■ Tight timing 06/05/13 U of D0 – CMS Upgrades 45