Post on 17-Jan-2016
LHC CMSDetectorUpgrade
Project
CD-1 Review -- B04-1: Trigger Upgrade Overview 1
B04-1 – Trigger Upgrade Overview
Wesley Smith, U. Wisconsin
L2 Manager, WBS 401.4
August 26, 2013
Wesley Smith, 26 August 2013
LHC CMSDetectorUpgrade
ProjectL1 Upgrade TDR
Final presentation to LHCC was Tuesday June 11th
Public version of the TDR here:https://cds.cern.ch/record/1556311
Approved!
26 August 2013, Wesley SmithCD-1 Review -- P05: Trigger Upgrade 2
LHC CMSDetectorUpgrade
Project
3
Physics priorities: Measure all Higgs BR precisely as possible to confirm
Standard Model or not retain or improve current trigger ⇒capability critical
Want to be able to answer question of naturalness - whether or not there is new physics stabilizing Higgs masso SUSY remains a leading candidate, but if so, must have light stopso Also must be able to trigger on & search for all variants (e.g. RPV
with all hadronic final states) to draw a firm conclusion
Studied a set of benchmark physics channels Looked at performance of these channels in 2012 analyses
with & without L1 trigger upgrade at different luminositieso Based on a simplified trigger menu with a total rate < 100 kHz
Results summarized on next slideWesley Smith, 26 August 2013CD-1 Review -- B04-1: Trigger Upgrade Overview
Upgrade Trigger Physics Performance
LHC CMSDetectorUpgrade
Project
CD-1 Review -- B04-1: Trigger Upgrade Overview 4
Process(x2 improvement highlighted)
1.1 x 1034 cm–2 s–1 2.2 x 1034 cm–2 s–1
Current Upgrade Current Upgrade
W(en),H(bb) 57.7% 87.0% 37.5% 71.5%
W(mn),H(bb) 95.9% 100% 69.6% 97.9%
VBF H( ( )tt mt ) 42.6% 51.3% 19.4% 48.4%
VBF H( ( )tt et ) 24.4% 44.3% 14.0% 39.0%
VBF H( ( )tt tt ) 17.2% 53.7% 14.9% 50.1%
H(WW(eenn)) 91.4% 97.8% 74.2% 95.3%
H(WW(mmnn)) 99.9% 99.9% 89.3% 99.9%
H(WW(emnn)) 97.6% 99.4% 86.9% 99.3%
H(WW(menn)) 99.6% 99.5% 90.7% 99.7%
StopbWce, jets (600 – 450 GeV) 55.8% 68.2% 50.3% 64.8%
StopbWc ,m jets (600 – 450 GeV) 78.1% 81.6% 76.4% 84.5%
RPV Stopjets (200 GeV) 70.1% 99.9% 43.6% 99.9%
RPV Stopjets (300 GeV) 93.7% 99.9% 79.7% 99.9%Wesley Smith, 26 August 2013
Physics Performance Summary(detail in subsequent talks)
Ave
rage
Impr
ovem
ent:
17%
(Lo
w L
umi)
& 4
0% (
Hig
h Lu
mi)
LHC CMSDetectorUpgrade
Project
CD-1 Review -- B04-1: Trigger Upgrade Overview 5
Remove limit of 3 segments per Muon Port Card Each Muon Port Card covers one 20° phi sector Particularly problematic for multiple collimated muons w/rising occupancy
Increase bandwidth in trigger links Occupancy of segments from chambers will exceed optical link bandwidth to CSC Track-
Finder Sector Processors Dropped segments will degrade performance: lose momentum precision (higher rate) and/or
tracks (inefficiency).
Improve upon successful features of current CSC Track-Finder Enlarge LUT memory for pT assignment from MBs to GBs, → better “fit” to trajectory
o Use more angles Larger FPGA to handle more hits from PU, additional chambers
Improve momentum resolution Full use of all track information → ç Steeper rate v. pT threshold curve → increases safety margin for high luminosity & high PU
Higher precision output track quantities/more μ candidates to Global Muon Trigger upgrade
η ϕ = 0.05 2.5° → 0.0125 0.015° ✕ ✕ ✕ Accommodate new algorithms like those in Higher Level Trigger
o invariant mass cuts, jet-lepton matching, … Requires new high bandwidth (optical) links to Global Trigger
Wesley Smith, 26 August 2013
Goals for CSC Trig. Upgrade
LHC CMSDetectorUpgrade
Project
CD-1 Review -- B04-1: Trigger Upgrade Overview 6
Sophisticated pT assignment (studied with BDTs) based on expanded list of information over current CSCTF Tail Clipping: if a variable, e.g. Δφ12,is in 5% (10%, 15%) tail, demote pT to
most probable value for given Δφ12
Repeat over all 10 variables, report lowest demoted pT
Sharpens rate curve, factors of 2-3 rate reduction for modest efficiency loss (~5%, and programmable)Wesley Smith, 26 August 2013
PT Assignment Algorithm Studies
LHC CMSDetectorUpgrade
Project
CD-1 Review -- B04-1: Trigger Upgrade Overview 7
Muon Trigger WBS Detail
Wesley Smith, 16 July 2013 Fermilab Director's Review -- US CMS Trigger Upgrade
→Calorimeter
Trigger
M&S onOps. Prog.
Wesley Smith, 26 August 2013
LHC CMSDetectorUpgrade
Project
CD-1 Review -- B04-1: Trigger Upgrade Overview 8
401.04.03 EMU Trigger UpgradeCavern Counting Room
μTCA: Advanced Mezzanine Cards fromTelecommunications Computing Architecture(commercial telecommunications hardware)
Wesley Smith, 26 August 2013
401.04.03.03MPC-EMUTFOptical Fibers*(Rice)
401.04.03.02Muon Port CardMezzanine* (Rice)
401.04.03.04Endcap MuonTrack-Finder(U. Florida)
401.04.03.05EMUTF Infrastructure(U. Florida)
401.04.03.06: Muon Sorter (Rice)
Trig
ge
r M
oth
erB
oa
rd
Da
ta M
oth
erB
oa
rd
Clo
ck&
Co
ntr
ol
Sector Processors
Clo
ck &
Co
ntr
ol
Mu
on
So
rte
r
*M&S on Ops. Prog.
LHC CMSDetectorUpgrade
Project
CD-1 Review -- B04-1: Trigger Upgrade Overview 9
401.04.03.02 Muon Port Card(Rice - M&S on Operations Program)
Wesley Smith, 26 August 2013
Use the existing MPC main board Backplane interface to TMB
remains unchanged
x 60 +20 spares
3 original optical links are still available
New mezzanine card with new FPGA and new links
(60 needed + 15 spares + 5 test setups = 80)
LHC CMSDetectorUpgrade
Project
10
401.04.03.04: EMU Track-Finder(U. Florida)
Wesley Smith, 26 August 2013CD-1 Review -- B04-1: Trigger Upgrade Overview
Muon Track Finder processor: MTF7 13 needed + 4 spares + 3 test setups = 20 Optimized for maximum input from muon detectors
(84 input links, 24 output links) Dual card with large capacity for RAM (~1GB) to be used for pT
assignment in track finding
Current prototype based on Virtex 6 FPGAis undergoing final tests (RLDRAM memory access)
Virtex 7 FPGA design is ~75% done, expected late 2013
Back: Core FPGA card with PT LUT mezzanine
Front: Optics card
LHC CMSDetectorUpgrade
Project
CD-1 Review -- B04-1: Trigger Upgrade Overview 11
401.04.03.05: EMUTF Infrastructure ( U. Florida)
Wesley Smith, 26 August 2013
Not US*
*Processing the resulting tracks with RPC or CSC hits is a US responsibility
401.04.02.04Endcap MuonTrack-Finder
401.04.02.06: Muon Sorter
LHC CMSDetectorUpgrade
Project
CD-1 Review -- B04-1: Trigger Upgrade Overview 12
401.04.03.06: Intermediate Sorter Upgrade (Rice)
Wesley Smith, 26 August 2013
Provide immediate CSC Trigger improvement in 2015
Provide optical path to new μTCA Global Muon Trigger from old CSCTF from each endcap Allows independent upgrade of individual
endcaps
Add isolation to endcap muons from old CSCTF with a new mezzanine card on the old muon sorter to send an optical path to 2015 calorimeter trigger initial upgrade
Analogous to MPC upgrade:
LHC CMSDetectorUpgrade
Project
CD-1 Review -- B04-1: Trigger Upgrade Overview 13
Improve electromagnetic object isolation Use calorimeter energy distributions with PU subtraction Sum up activity over time and regions of calorimeter to perform PU
subtraction
Improve control on isolation of electrons, photons, taus, muons Finer granularity of trigger tower processing used in isolation
calculations Provide for input from muon trigger of seed tower for isolation region
Improve Jet-Finding Use PU-subtracted clusters
Improve efficiency & reduce rate for Tau Trigger Use much narrower cone Existing Tau trigger performance is poor (see next slide)
Wesley Smith, 26 August 2013
Goals for Cal. Trig. Upgrade
LHC CMSDetectorUpgrade
ProjectTau Trigger
Big improvement in efficiency with ~10X rate reduction!
Wesley Smith, 26 August 2013CD-1 Review -- B04-1: Trigger Upgrade Overview 14
Current tau trigger has large and negative PU dependence
LHC CMSDetectorUpgrade
Project
Improved control on isolation Factor of 2-3 reduction in rate with small loss in efficiency
Wesley Smith, 26 August 2013CD-1 Review -- B04-1: Trigger Upgrade Overview 15
Upgrade Cal Trig: e/γ
LHC CMSDetectorUpgrade
Project
CD-1 Review -- B04-1: Trigger Upgrade Overview 16
Calorimeter Trigger WBS Detail
Wesley Smith, 26 August 2013
←MuonTrigger
M&S paid byCMS-France
LHC CMSDetectorUpgrade
Project
CD-1 Review -- B04-1: Trigger Upgrade Overview 17
Calo. Trigger Upgrade in Parallel: Split inputs from ECAL & HCAL
HCALEnergy(HTR)
ECALEnergy(TCC)
Regional Calo Trigger
Global Calo Trigger
EMcandidates
Regionenergies
HFEnergy(μHTR)
HCALEnergy(μHTR)
Layer 1Calo Trigger
Layer 2 Calo TriggerC
urre
nt L
1 T
rigge
r S
yste
m
Upg
rade
L1
Trig
ger
Sys
tem
oSLB
oRM
Install ECAL optical SLB & optical RM (oRM) mezzanines during LS1 Install HCAL optical splitters during Year End Technical Stop (YETS) Install HCAL backend μHTR cards for input to new trigger Install HCAL frontend electronics after LS2 (finer long. segmentation)
Wesley Smith, 26 August 2013
US
UK
US
UK
HCAL OpticalSplitters
Stage HCAL uHTR & assoc. Cal. Trigger Cards
LHC CMSDetectorUpgrade
Project
CD-1 Review -- B04-1: Trigger Upgrade Overview 18
Upgraded HCAL Readout & Trigger Electronics (μHTR) is after split that sends data to old electronics (HTR)
μHTR supplies TP to upgrade cal. trig., HTR continues to send to present cal. trig.
ECAL Trigger Concentrator Cards (TCC) are not upgraded, instead mezzanines w/trigger serial links are replaced (Lisbon):
Optical Serial Link Board oSLB replaces single copper link to current Regional Calorimeter Trigger (RCT – U. Wisc.) with two optical links (WBS 401.04.04.06)
One optical link to optical Receiver Module (oRM) on RCT (WBS 401.04.04.05)o Replaces copper Receiver Module
One optical link to input of Upgraded Calorimeter Trigger: CTP7 Card
574 oSLB’s & oRM’s with Fibers installed in 2014 French Contribution to Calorimeter Trigger (no US Upgrade Funds)
Presently oSLB & oRM in final prototype stage oSLB:
oRM:
Wesley Smith, 26 August 2013
HCAL & ECAL Trigger Primitives
LHC CMSDetectorUpgrade
Project
CD-1 Review -- B04-1: Trigger Upgrade Overview 19
401.04.04.02: Cal. Trig. ProcessorVirtex-6 Proto. Board – U. Wisconsin
Back End FPGAXC6VHX250T/XC6VHX380T
Front End FPGAXC6VHX250T/XC6VHX380T
Avago AFBR-810B Tx Module
4X Avago AFBR-820B Rx Module
MMC Circuitry
JTAG/USB ConsoleInterface Mezzanine
Power Modules
Dual SDRAM for dedicated DAQ and TCP/IP buffering
12x Multi Gig Backplane Connections
Wesley Smith, 26 August 2013
36 total + 8 spares + 2 test setups = 46
CTP6
LHC CMSDetectorUpgrade
Project
CD-1 Review -- B04-1: Trigger Upgrade Overview 20
401.04.04.02: Cal. Trig. ProcessorFinal Version: Virtex-7 – U. Wisconsin
• Replace 2 Virtex-6s with a Virtex 7 for processing+ZYNQ for embedded TCP/IP endpoint
• 30A, 1V power module for FPGA logic core
• 3x CXP Pluggable modules for 36 Tx + 36 Rx 10G optical links
• 2x AFBR-820 modules for 24 Rx 10G optical links
• Simpler design to execute than the CTP-6
• 36 total + 8 spares + 2 test setups = 46
Virtex-7 VX690T FPGA
ZYNQXC7Z03
0EPP
1.5V
S
up
ply
2.5V
S
up
ply
3.3V
S
up
ply
1V
30A
S
up
ply CXP Module
12Tx + 12 Rx
CXP Module12Tx + 12Rx
CXP Module12Tx + 12 Rx
12XRx
12XRx
(CTP-6 CAD View)
Wesley Smith, 26 August 2013
CTP7
LHC CMSDetectorUpgrade
Project
CD-1 Review -- B04-1: Trigger Upgrade Overview 21
401.04.04.03: Crosspoint IO Card: crate interconnections – U. Wisconsin
Controller (MMC and link mgmt)
4X Avago AFBR-79EQDZ QSFP+ ModulePositions
4x4 Lane Bidirectional Multi Gig Backplane Connections
Backplane Rx/Tx
Redriver ICs (top and
bottom sides)
Wesley Smith, 26 August 2013
(2/crate x 3 crates = 6 + spares)
LHC CMSDetectorUpgrade
Project
CD-1 Review -- B04-1: Trigger Upgrade Overview 22
401.04.04: CTP Infrastructure:Vadatech VT894 Crate Test Setup
BU
AM
C13
Vad
atec
h
MC
H UW
CT
P-6
UW
CT
P-6
TTC Downlink
UW
Au
x
Wesley Smith, 26 August 2013
(Final system: 3 crates w/ 12 CTP7 ea. + 2 test setups + spare = 6)
U. Wisconsin designed backplane with dense card interconnectsmanufactured & installed in commercial Vadatech VT892 Crate available in Vadatech Catalog
LHC CMSDetectorUpgrade
Project
CD-1 Review -- B04-1: Trigger Upgrade Overview 23
Goal (Original): Provide readout of original RCT descoped during construction project Present readout through GCT input buffer not workable with trigger evolution Use connection to a single CTP6 prototype or CTP7 card for DAQ readout
optical Receiver Summary Card (oRSC) paid by DOE Nuclear VME Slave Interface Card Fits in current RCT Crates (1 per crate) 18 Cards in 2015 System Receives RCT Jet Sum Card Output
to GCT on Copper “SCSI” Data Cables Provides direct optical input to GCT
o Bypassing old optical conversion cards
Planned use for Heavy Ion Triggers Prototype under test
Multiple optical outputs provide: Inputs for upgrade calorimeter trigger &
parallel operation of old & new trigger wherever ECAL & HCAL electronics notavailable in 2015
Wesley Smith, 26 August 2013
Calorimeter Trigger Risk Mitigation
LHC CMSDetectorUpgrade
Project
CD-1 Review -- B04-1: Trigger Upgrade Overview
Cal. Trig. Partial Upgrade in 2015
Wesley Smith, 26 August 2013 24
Layer 2 Calo Trigger
HCALenergy
Regional Calo Trigger
Global Calo Trigger
HFenergy
oRSC
Layer 2Calo Trigger
oRM
ECALenergy
Layer 1 Processors
oSLB ECAL & HF ClustersHalf-tower position
4x4 E+H Clusters2x1 E+H Clusters
2-bit region ID
Layer 2 Processors
MuonJets & Sums
eGammaTau
Heavy IonSpare
RCT RO + Testing
GCT fallback and Minimal Stage-1 fallback remains
available
With just a fraction of final cards or even prototypes, derive many benefits
of full upgrade, incl. muon isolation
Uses reprogrammed RCT clusters with improved algorithms in Layer-2 Also, brings in all the power of finer grain HF using “Slice Test” of Layer-1 & 2
Improved PU subtraction, Isolation Calculation (e/γ/τ/μ) & Half-tower Position Resolution
US Items: oRSCs, oSLB/oRM commissioning CTP Layer 1 Processors RCT RO+Testing CTP
UK Items: MP7 Layer 2 Processors
36 mHTRs
2 CTP7s 9 CTP7s
Add to bring in finer grain EM clusters
2 CTP7s
4 MP7s
LHC CMSDetectorUpgrade
Project
CD-1 Review -- B04-1: Trigger Upgrade Overview 25
CTP7 M&S: no HB/HE Backend until 2016 Delay purchase of 34 CTP7 cards until FY15 Use 12 CTP7 Cards w/prototypes as additional spares & for test
setups.
EMU CSCTF M&S: one endcap in 2015 & other in 2016 Commission & test one endcap thoroughly so 2nd can be integrated
quickly Delay spares & use prototypes for spares, test setups Compatible with Global Muon Trigger using different Endcap inputs
Stages and Content:
Wesley Smith, 26 August 2013
Trigger Staging
LHC CMSDetectorUpgrade
Project
CD-1 Review -- B04-1: Trigger Upgrade Overview 26
US CMS Upgrades to Calorimeter & Endcap Muon triggers enable CMS to keep the inclusive lepton thresholds below the W peak, recover a tau trigger for high PU, and improve multi-jet triggers with PU subtraction (also benefits Heavy Ion program)
Plan allows for parallel operation of old & new trigger systems, commissioning & testing of new system during data-taking (with data) & evolution to final system while providing immediate availability of improved trigger in 2015
Upgrade is based upon common μTCA hardware platform also used by HCAL & other CMS systems
Trigger Upgrade is technically feasible since based on working prototypes, & built by the same team that built original CMS Calorimeter & Muon triggers.
Trigger Upgrade can be accomplished within Cost & Schedule since based on working prototypes and experience in building the original CMS Calorimeter & Muon triggers.
Risks are understood and familiar due to team experience – risk is mitigated by parallel operation of existing and upgraded calorimeter systems
Wesley Smith, 26 August 2013
Summary
LHC CMSDetectorUpgrade
Project
CD-1 Review -- B04-1: Trigger Upgrade Overview 27
Additional Slides
Wesley Smith, 26 August 2013
LHC CMSDetectorUpgrade
ProjectCalorimeter Trigger Components
Wesley Smith, 26 August 2013CD-1 Review -- B04-1: Trigger Upgrade Overview 28
Type Name Purpose
TCC Trigger Concentrator Card Existing ECAL trigger primitives (TP) (Paid by FR)
oSLB Optical Serial Link Board Transmit ECAL TPs to RCT & CTP (Paid by PT)
mHTR HCAL Trigger & DAQ Board Create and transmit HCAL TPs
RCT Regional Calorimeter Trigger Existing trigger system
oRM Optical Receiver Modules Receive ECAL TPs on RCT(Paid by FR)
oRSC Optical Regional Summary Card Convert and transmit RCT output(paid by DOE Nuclear)
CTP Compact Trigger Processor Large FPGA w/ optical & backplane
CIOX Compact IO cross-point switch Intra-crate sharing switch
MP7 Multipurpose Processor Large FPGA w/ only optical links (UK)
LHC CMSDetectorUpgrade
Project
29CD-1 Review -- B04-1: Trigger Upgrade Overview
Schedule/Milestones – Level 3
Wesley Smith, 26 August 2013
Targeting completion of milestones 3 months earlier
LHC CMSDetectorUpgrade
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CD-1 Review -- B04-1: Trigger Upgrade Overview 30
Schedule/Milestones – Level 4
Wesley Smith, 26 August 2013
LHC CMSDetectorUpgrade
Project
CD-1 Review -- B04-1: Trigger Upgrade Overview 31
Critical path follows second phase of module production driven by funding profile
Wesley Smith, 26 August 2013
Schedule – Critical Path