lhc cms detector upgrade project 401-04-04 calorimeter trigger sridhara dasu, university of...
Post on 29-Mar-2015
218 Views
Preview:
TRANSCRIPT
LHC CMSDetectorUpgrade
Project
DOE CD1 Review - US CMS Upgrade - Trigger 1
401-04-04 Calorimeter Trigger
Sridhara Dasu, University of Wisconsin
DOE CD1 Review
26 August 2013
Sridhara Dasu, 26 August 2013
LHC CMSDetectorUpgrade
Project
DOE CD1 Review - US CMS Upgrade - Trigger 2
Calorimeter Trigger WBS Detail
Sridhara Dasu, 26 August 2013
←MuonTrigger
M&S paid byCMS-France
LHC CMSDetectorUpgrade
Project
Sridhara Dasu, 26 August 2013 DOE CD1 Review - US CMS Upgrade - Trigger 3
Calorimeter Trigger ComponentsType Name Purpose
TCC Trigger Concentrator Card Existing ECAL trigger primitives (TP) (France)
oSLB Optical Serial Link Board Transmit ECAL TPs to RCT & CTP (Portugal / France)
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(Portugal / France for Stage-1)
oRSC Optical Regional Summary Card Convert & transmit RCT output (US DOE NP for Stage-1)
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
DOE CD1 Review - US CMS Upgrade - Trigger 4
Upgraded HCAL Readout & Trigger Electronics (μHTR) is after split that sends data to old electronics (HTR) μHTR supplies TP to upgrade trigger, HTR continues to send to present trigger
ECAL Trigger Concentrator Cards (TCC) are not upgraded, instead their mezzanines with 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:
Sridhara Dasu, 26 August 2013
HCAL & ECAL Trigger Primitives
OSLB Output / oRM Input: 4x channels @ 1.2 Gbps 4.8 Gbps
LHC CMSDetectorUpgrade
Project
DOE CD1 Review - US CMS Upgrade - Trigger 5
Main processor card Virtex-7 690T
for processing ZYNQ
for TCP/IP + linux 60 10G optical
Input links 36 10G optical
Output links Function: Find ET
clusters & transmit to Layer-2
• Card Count = 46• 36 total +
8 spares + 2 test setups
Sridhara Dasu, 26 August 2013
401.04.04.02: CTP Card Concept
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 BG View)
LHC CMSDetectorUpgrade
Project
DOE CD1 Review - US CMS Upgrade - Trigger 6
CTP: Virtex-6 Prototype Exists
Sridhara Dasu, 26 August 2013
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
LHC CMSDetectorUpgrade
Project
Validation of signal integrity on CTP6
Sridhara Dasu, 26 August 2013 DOE CD1 Review - US CMS Upgrade - Trigger 7
CTP-6 Intraboard link eyepattern
LHC CMSDetectorUpgrade
Project
DOE CD1 Review - US CMS Upgrade - Trigger 8
12-links tested at 6.4 Gbps – no errors
Sridhara Dasu, 26 August 2013
HCAL TPG to CTP Integration Test
LHC CMSDetectorUpgrade
Project
DOE CD1 Review - US CMS Upgrade - Trigger 9
Running Linux on CTP6 FPGA – PetaLinux
Startup screen via USB console
Root login, pinging controller PC at 192.168.1.2
Running on CTP-6 back end FPGA (`VHX250T)
Important step towards CTP-7 ZYNQ-based Linux
Sridhara Dasu, 26 August 2013
LHC CMSDetectorUpgrade
Project
DOE CD1 Review - US CMS Upgrade - Trigger 10
Physicists can contribute to CTP6 software Familiar, reliable environment Faster development cycles Use of IPBus and uHAL over TCP/IP (CMS standards) Coupled with AMC13 (Boston), DAQ can be implemented more
easily No need
for customfirmware orkernel softwarefor monitoring and control
Postdocs arealready usingPetalinux
Sridhara Dasu, 26 August 2013
Advantage of Linux System on Chip
LHC CMSDetectorUpgrade
Project
DOE CD1 Review - US CMS Upgrade - Trigger 11
CTP7 is simpler than CTP6 prototype Engineering effort for in-house design based on CTP6 work Procurement of PCBs is based on recent CTP6 purchase Good estimate of cost and schedule from prototype manufacture
Quotes available for all parts Virtex-7 690T is the major cost driver – with recent quote
o 3 690Ts donated by Xilinxo 5 690Ts purchased from Xilinxo Total of 8 FPGAs in-hand for prototypes
Optical modules based on recent purchase Miscellaneous parts also have quotes or estimated from
prototype purchases (power modules)
Sridhara Dasu, 26 August 2013
CTP: Basis of Estimate - Hardware
LHC CMSDetectorUpgrade
Project
DOE CD1 Review - US CMS Upgrade - Trigger 12
Firmware and software efforts estimated from prototype testing + prior RCT experience Firmware algorithms for testing provide the basis for the core
firmware, which is the most complicatedo Tom Gorski and Mathias Blake
Trigger algorithm firmware work is based on prior experience managing GCT project (UK)o Wesley Smith was L1 project manager overseeing GCT
Software effort is based on current RCTo Sophistication of embedded Linux / TCP and shorter timeline for
implementation requires professional software effort– Jes Tikalsky
o Bulk of testing software from post-doc and graduate student– Pam Klabbers, Evan Friis and graduate students will develop software
Board and Firmware/Software done by the same group (Wisconsin) results in efficiencies
Sridhara Dasu, 26 August 2013
CTP: Basis of Estimate - Effort
LHC CMSDetectorUpgrade
Project
DOE CD1 Review - US CMS Upgrade - Trigger 13
Function: For inter-board connections
Input/Output: 48x 4.8-6.4 Gbps
Prototype exists
Fully tested
Firmware is minimal and exists
CIOX cost well known
Ready for production
Sridhara Dasu, 26 August 2013
401.04.04.03: Crosspoint IO Card– U. Wisconsin
Controller (MMC and link mgmt)
4X Avago AFBR-79EQDZ QSFP+ ModulePositions
4x4
Lan
e B
idir
ecti
on
al M
ult
i G
ig
Bac
kpla
ne
Co
nn
ecti
on
s
Backplane Rx/Tx
Redriver ICs (top and
bottom sides)
(2/crate x 3 crates = 6 + spares)
LHC CMSDetectorUpgrade
Project
DOE CD1 Review - US CMS Upgrade - Trigger 14Sridhara Dasu, 26 August 2013
401.04.04.04: 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
(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
DOE CD1 Review - US CMS Upgrade - Trigger 15
The dominant risks are: Availability of ALL trigger primitive inputs from ECAL,
HCAL in optical format Validation of large optical link plant in limited time Fully validated trigger algorithms in firmware Control and operations software
Risk mitigation strategy: Continue to provide fully operational current trigger
system in parallel with upgrade commissioning Partial operation of the upgrade systems provide
tangible benefits from 2015 onwards
Sridhara Dasu, 26 August 2013
CTP: Risk and Mitigation Strategy
LHC CMSDetectorUpgrade
Project
DOE CD1 Review - US CMS Upgrade - Trigger 16
Goal (Original): Provide readout of original RCT descoped
during construction project Present readout through GCT input buffer
not workable with trigger evolution Uses 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
Sridhara Dasu, 26 August 2013
Calorimeter Trigger Risk MitigationoRSC Function:
Conversion to opticaloRSC Input:
RCT egt and jet clusters
80 MHz Parallel ECLoRSC Output:
6x copies at 6.4 Gbps optical
LHC CMSDetectorUpgrade
Project
DOE CD1 Review - US CMS Upgrade - Trigger 17
4 Boards manufactured and tested
12 layer board, with Isola iSpeed Laminate for high-speed SERDES
Kintex-7 355T-2 as the RCT parallel-to-optical-Tx interface device
Spartan-6 for VME Slave Interface and I2C/general device controller
Two Avago miniPOD 12-lane transmitters for optical outputs per card
One card per RCT crate, capturing the output from the Jet Summary Card, and receiving clock/control signals from the RCT Crate Clock Card
Card is functional: Tested oRSC to CTP6 optical rx/tx at 6.4 Gbps (23 links) oRSC integration test with MP7 (UK) planned for July 2 oRSCs can be used to fully emulate the 18-crate RCT output
o Will be used for developing RCT readout validation in 2013
Sridhara Dasu, 26 August 2013
oRSC Card Status
LHC CMSDetectorUpgrade
Project
DOE CD1 Review - US CMS Upgrade - Trigger 18
oRSC-CTP6 Monitoring and Validation
Zero bit errors10^-14 BER!
Sridhara Dasu, 26 August 2013
LHC CMSDetectorUpgrade
Project
DOE CD1 Review - US CMS Upgrade - Trigger 19
CTP6 Readout Validation
Two Virtex6 FPGAs on CTP6 Both have Microblaze embedded processor Enables straight forward development in C++
Read out captured transmitter data via IPBus protocol from remote server Back End FPGA embedded processor running Linux
o serves IPBus over TCP/IPo Forward IPBus packets over serial protocol to FPGA2o Able to readout arbitrary memory locations from both FPGAso Receive upgrade commands for writing FPGA configuration images and additional
Linux executables to onboard flash memory Front End FPGA embedded processor running standalone app
o Able to accept and decode IPBus Packetso Control or report status of all 48 fiber linkso Read capture RAMs for all or selected fibers
Sridhara Dasu, 26 August 2013
LHC CMSDetectorUpgrade
Project
DOE CD1 Review - US CMS Upgrade - Trigger 20
CTP Readout Configuration
Sridhara Dasu, 26 August 2013
CTP6
LHC CMSDetectorUpgrade
Project
DOE CD1 Review - US CMS Upgrade - Trigger 21Sridhara Dasu, 26 August 2013
CTP Monitoring and Validation Software
• Software status and control• Real Time monitor link status• Real time fiber link receiver control• Read out from selected link Capture RAMs
LHC CMSDetectorUpgrade
Project
DOE CD1 Review - US CMS Upgrade - Trigger 22
CTP6 / Linux Monitoring & Validation
Sridhara Dasu, 26 August 2013
• Six links connected from oRSC to CTP6 during integration test
• Displays real time fiber connection status for each of 48 CTP6 fiber inputs• Overflow, Underflow, Loss of Sync, Data Error Detect, and PLL Lock
• All six fiber links locked and error free
LHC CMSDetectorUpgrade
Project
DOE CD1 Review - US CMS Upgrade - Trigger 23
CTP / Linux Monitoring & Validation
Sridhara Dasu, 26 August 2013
• Fiber Capture RAM readout
• SW controllable capture• Sync character to start capture• Length of Capture• Links to readout
• Capture RAM auto clears on each capture
• All six links capture expected pattern from oRSC• Captured data automatically checked by host
LHC CMSDetectorUpgrade
Project
DOE CD1 Review - US CMS Upgrade - Trigger 24
oRSC to MP7 Link Validation
Bathtub Curve Eye Diagram
Extraordinary margin available in bathtub curve
Superb eye opening measured at MP7 receiver
Zero Bit errors with overnight iBERT PRBS testing
Data validation: oRSC pattern RAM to MP7 capture RAM
Sridhara Dasu, 26 August 2013
LHC CMSDetectorUpgrade
Project
DOE CD1 Review - US CMS Upgrade - Trigger 25
mHTR to CTP6 integration test at Madison (done) Wisconsin/Minnesota : 12 links operated successfully
oRSC to CTP6 demonstrator at Madison (done) Test 2-3 oRSCs and interface before shipment to CERN
oRSC to CTP6 platform at Prevessin (done) 2 oRSCs emulate RCT + 1 CTP6 for RCT readout and algorithm tests Full platform for system operations and control software development
oRSC - MP7 Integration test at Prevessin (done) Wisconsin/Imperial July 2013 Milestone
CTP6 - oRSC-oRM/RCT - oSLB/TCC Integration Test at Prevessin Wisconsin/Lisbon/LLR October 2013 Milestone
CTP6 - oRSC-oRM/RCT - oSLB/TCC -uHTR Integration Test at 904 Wisconsin/Lisbon/LLR/Minnesota November 2013 Milestone
CTP7 - MP7 Integration test at Prevessin Wisconsin/Imperial March 2014 Milestone
Sridhara Dasu, 26 August 2013
Demonstrators & Critical Integration Tests
LHC CMSDetectorUpgrade
Project
DOE CD1 Review - US CMS Upgrade - Trigger 26
2013 M&O + R&D Activity : oRSC construction, installation Firmware development for RCT readout and testing using CTP6 Lisbon / France : oSLB and oRM construction, installation Minnesota / Wisconsin : mHTR to CTP6 testing
2014 Ensure fully working legacy RCT system with oRSC + CTP6 RO CTP7, CIOX, … construction, validation Firmware development for CTP7 testing and 2015 operation
2015 Commission and operate Stage-1 system Firmware development and integration of Stage-2 system
2016 Commission and operate Stage-2 system
Sridhara Dasu, 26 August 2013
Adiabatic Upgrade Timeline
LHC CMSDetectorUpgrade
Project
DOE CD1 Review - US CMS Upgrade - Trigger 27
CT Milestones
Sridhara Dasu, 26 August 2013
Activity ID Activity Name Target Completion
Milestone
T1020 L2 – Deliver Stage-1 Layer 1 to CERN 15-Nov-2014 15-May-2015
T1030 L2 – Deliver Stage-2 Layer 1 to CERN 10-Mar-2015 10-Sep-2015
T1040 L2 – Test operation at CERN 15-Aug-2015 15-Feb-2016
T1070 L2 – Test High-Luminosity Capability 28-Sep-2016 28-Mar-2017
T3310 L3 – Commission CTP7 for Initial Ops 15-Apr-2015 15-Jul-2015
T4000 L3 – Commission CIOX for Final Ops 04-Sep-2016 04-Dec-2016
T3320 L3 – Commission CTP7 for Final Ops 29-Sep-2016 29-Dec-2016
T4740 L4 – oSLB-oRM Optical Fibers Complete 15-Sep-2014
T4090 L4 – CIOX Software and Firmware Complete 10-Dec-2014
T4210 L4 – CIOX Production Complete 08-Jan-2015
T3710 L4 – CTP7 Production Complete 08-Jan-2015
T4510 L4 – CTP Infrastructure Production Complete 29-Jul-2015
T4300 L4 – CIOX Commissioning Complete 09-Sep-2015
T3980 L4 – CTP7 Test, Install and Commissioning Complete
30-Sep-2016
T3520 L4 – CTP7 Software and Firmware Complete 30-Sep-2016
LHC CMSDetectorUpgrade
Project
DOE CD1 Review - US CMS Upgrade - Trigger 28
Backup Slides for Q&A
Sridhara Dasu, 26 August 2013
LHC CMSDetectorUpgrade
Project
DOE CD1 Review - US CMS Upgrade - Trigger
Evolution: Stage-1 Upgrade in 2015
Sridhara Dasu, 26 August 2013 29
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 remains
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
DOE CD1 Review - US CMS Upgrade - Trigger 30
Calorimeter Trigger Upgrade Options
Two modes of connectivity required
Layer 1: Pipelined: forms
various cal. clustersto send to L2 nodesfor different triggers
TMT: distributes allcal. Info. in eventto one multiplexedL2 node for all triggers
Layer 2: Finds different trigger
objects using clustersor scanning (TMT)all cal. info. & thendemultiplexing
Keep new trigger flexible to adapt to needs of evolving CMS physics program Both architectures have two processing layers
o Layer 1 optimized for backplane connectivity, Layer 2 for optical TMT architecture chosen as initial baseline
o Stage-1 must use pipelined traditional architecture
Fully Pipelined Calorimeter Trigger
Time Multiplexed Calorimeter Trigger
US: Layer 1:CTP7 Cards
UK: Layer 2: MP7 Cards
Demux
Layer 1
Layer 2
Sridhara Dasu, 26 August 2013
LHC CMSDetectorUpgrade
Project
DOE CD1 Review - US CMS Upgrade - Trigger 31
Crate GUp to 12TriggerPath
Modules
Trig Path 1(MP7)
Fiber patch panel
Crate C
() () CT
P
() () ()() () () CT
P
() () ()
Trig Path 2(MP7)
Trig Path 3(MP7)
Trig Path 4(MP7)
Trig Path 5(MP7)
Trig Path 6(MP7)
ECAL
Each 1st-Level CTP7 Drives 2 fibers out to 6-12 Trigger Paths @ 9.6 Gbps
Each Trigger Path MP7 rcvs 48 total 1st-Level fibers @ 9.6 Gbps (2/region)
To GT To GT
()()() () ()() ()
Crate A
Crate G
Pipelined Calorimeter Trigger (Stage-1)
Calorimeter Trigger Processor (CTP) Card
Sridhara Dasu, 26 August 2013
Each Layer 2 processor calculates suite of trigger paths
Layer 1 and RCT send dedicated clusters to Layer 2
(Default plan till all ECAL & HCAL TPs are available in optical format.)
HBHE
Current RCT
HF HF
oRS
C
LHC CMSDetectorUpgrade
Project
DOE CD1 Review - US CMS Upgrade - Trigger 32
Crate GUp to 12TriggerPath
Modules
Trig Path 1(MP7)
Fiber patch panel
Crate B Crate C
() CT
P
() CT
P
() CT
P
CT
P
() CT
P
() CT
P
()CT
P
() CT
P
() CT
P
() CIO
-U
CIO
-L
6 x 8-fiber ribbons for Lateral Network(@ 4.8 Gbps)
Trig Path 2(MP7)
Trig Path 3(MP7)
Trig Path 4(MP7)
Trig Path 5(MP7)
Trig Path 6(MP7)
ECALECAL ECAL
Each 1st-Level CTP7 Drives 2 fibers out to 6-12 Trigger Paths @ 9.6 Gbps
Each Trigger Path MP7 rcvs 48 total 1st-Level fibers @ 9.6 Gbps (2/region)
To GT To GT
()CT
P
CT
P
()CIO
-L
CT
P
() CIO
-U
CIO
-L
CIO
-U
Crate A
Crate G
Pipelined Calorimeter Trigger (Stage-1)
Calorimeter Trigger Processor (CTP) CardCrosspoint I/O (CIO) Card
Sridhara Dasu, 26 August 2013
Each Layer 2 processor calculates suite of trigger paths
Layer 1 sends dedicated clusters to Layer 2
(Default plan till all ECAL & HCAL TPs are available in optical format.)
HBHE
Current RCT
HF HFHF
LHC CMSDetectorUpgrade
Project
DOE CD1 Review - US CMS Upgrade - Trigger 33
Crate GUp to 12TriggerPath
Modules
Trig Path 1(MP7)
2x288-fiber patch panel (2x24×12-fiber optical ribbons in & out)
Crate B Crate C
CT
P
CT
P
CT
P
CT
P
CT
P
CT
P
CT
P
CT
P
CT
P
CT
P
CT
P
CT
P
CT
P
CT
P
CT
P
CT
P
CT
P
CT
P
CIO
-U
CIO
-L
6 x 8-fiber ribbons for Lateral Network(@ 4.8 Gbps)
Trig Path 2(MP7)
Trig Path 3(MP7)
Trig Path 4(MP7)
Trig Path 5(MP7)
Trig Path 6(MP7)
HCALECALHCALECAL HCALECAL
Each 1st-Level CTP7 Drives 2 fibers out to 6-12 Trigger Paths @ 9.6 Gbps
Each Trigger Path MP7 rcvs 48 total 1st-Level fibers @ 9.6 Gbps (2/region)
To GT To GT
CT
P
CT
P
CT
P
CT
P
CIO
-L
CT
P
CT
P
CIO
-U
CIO
-L
CIO
-U
Crate A
Crate G
Pipelined Calorimeter Trigger Upgrade
Calorimeter Trigger Processor (CTP) CardCrosspoint I/O (CIO) Card
Sridhara Dasu, 26 August 2013
Each Layer 2 processor calculates suite of trigger paths
Layer 1 sends dedicated clusters to Layer 2
(Default plan till all ECAL & HCAL TPs are available in optical format.)
LHC CMSDetectorUpgrade
ProjectTMT Calorimeter Trigger Upgrade
Sridhara Dasu, 26 August 2013 DOE CD1 Review - US CMS Upgrade - Trigger 34
Time-multiplexed architecture, calo data from an entire event processed by a single processor
LHC CMSDetectorUpgrade
Projecte / g / t Position Resolution
Sridhara Dasu, 26 August 2013 DOE CD1 Review - US CMS Upgrade - Trigger 35
Significantly improved position resolution Further enhanced with optional Stage-1
LHC CMSDetectorUpgrade
Project
DOE CD1 Review - US CMS Upgrade - Trigger 36
Electron / Photon Trigger
Improved control on isolation even at Stage-1 Factor of 2-3 reduction in rate with small loss in efficiency
Sridhara Dasu, 26 August 2013
LHC CMSDetectorUpgrade
ProjectTau Trigger
Big improvement in efficiency with ~10X rate reduction!
Sridhara Dasu, 26 August 2013 DOE CD1 Review - US CMS Upgrade - Trigger 37
Current tau trigger has large and negative PU dependence
LHC CMSDetectorUpgrade
ProjectJet Triggers
Sridhara Dasu, 26 August 2013 DOE CD1 Review - US CMS Upgrade - Trigger 38
Single jet
Single jet thresholds similar to current Multi-jet trigger thresholds better in upgrade (PU sub.) Small improvement in efficiency turn-on
Quad jetHT = S PTJets
LHC CMSDetectorUpgrade
Project
DOE CD1 Review - US CMS Upgrade - Trigger 39
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%
Physics Performance Summary
Ave
rage
Im
prov
emen
t: 1
7% (
Low
Lum
i) &
40%
(H
igh
Lum
i)
Sridhara Dasu, 26 August 2013
LHC CMSDetectorUpgrade
Project
DOE CD1 Review - US CMS Upgrade - Trigger 40
Shown examples of improved object performance Taken in isolation these do not show we can deliver the CMS physics programme: how do triggers
fit together? what about overlaps? Can we fit everything in 100 kHz limit?
Develop simplified L1 trigger menus to illustrate thresholds attainable within an overall fixed rate 1.1x1034 cm-2 s-1 with 50ns BX and 50 pile-up 2.2x1034 cm-2 s-1 with 25ns BX and 50 pile-up
Menus contain: Single lepton triggers Isolated single lepton triggers Dilepton triggers Lepton cross-triggers (lepton and jets or MET) Hadronic triggers
Captures about 80% of the rate in 2012 L1 trigger menu Does not include calibration triggers, prescaled trigger for efficiencies etc.
Sridhara Dasu, 26 August 2013
Expected performance
LHC CMSDetectorUpgrade
Project
DOE CD1 Review - US CMS Upgrade - Trigger 41
L=1.1x1034 cm-2s-1 with 50ns BX and 50 pile-up
Sridhara Dasu, 26 August 2013
⎬Single e/μ
Multijet
LHC CMSDetectorUpgrade
Project
DOE CD1 Review - US CMS Upgrade - Trigger 42
L=2.2x1034 cm-2s-1 with 25ns BX and 50 pile-up
Sridhara Dasu, 26 August 2013
⎬Single e/μ
Multijet
LHC CMSDetectorUpgrade
Project
DOE CD1 Review - US CMS Upgrade - Trigger 43
Physics priorities: Measure all Higgs BR as precisely as possible to confirm Standard
Model or not, so retaining or improving current trigger capability is critical
Want to be able to answer the question of naturalness - whether or not there is new physics stabilising the Higgs mass or noto SUSY remains a leading candidate, but if it is so, must have light stopso Also must be able to trigger on and search for all variants (e.g. RPV with
all hadronic final states) to draw a firm conclusion
Consider a set of benchmark physics channels Look at the performance of these channels in 2012 analyses with and
without L1 trigger upgrade at different luminosities using toy menus Benchmark the signal efficiencies in each case
Sridhara Dasu, 26 August 2013
Physics studies
LHC CMSDetectorUpgrade
Project
DOE CD1 Review - US CMS Upgrade - Trigger 44
Benchmark channels considered to highlight improvements
Higgs WH: H bb (➔ single lepton triggers) H ττ (➔ new tau algorithm, single lepton triggers) H WW (➔ single and dilepton triggers)
SUSY Direct stop squark production (single lepton, jets and MET triggers) RPV SUSY decays (hadronic triggers e.g. multijet)
Heavy Ion pT asymmetry in b jets (underlying event subtraction in jet trigger) Ratio of 3 to 2 jets (underlying event subtraction in jet trigger)
Sridhara Dasu, 26 August 2013
Physics performance
LHC CMSDetectorUpgrade
Project
DOE CD1 Review - US CMS Upgrade - Trigger 45
Higgs summary
Sridhara Dasu, 26 August 2013
LHC CMSDetectorUpgrade
Project
DOE CD1 Review - US CMS Upgrade - Trigger 46
SUSY summary
Sridhara Dasu, 26 August 2013
LHC CMSDetectorUpgrade
Project
DOE CD1 Review - US CMS Upgrade - Trigger 47
Higgs summary
Sridhara Dasu, 26 August 2013
Single e/μ ⎬⎬Tau ID &
Single e/μ
LHC CMSDetectorUpgrade
Project
DOE CD1 Review - US CMS Upgrade - Trigger 48
SUSY summary
Sridhara Dasu, 26 August 2013
Multijet
LHC CMSDetectorUpgrade
Project
DOE CD1 Review - US CMS Upgrade - Trigger 49
Heavy Ion performance
Sridhara Dasu, 26 August 2013
Readout rate is limited by data volume to 3 kHz Need reduction to 5% of current jet trigger
rate to reduce bandwidth Pile-up subtraction in upgraded trigger
achieves goal
Investigation of flavour dependence in jet quenching jet asymmetry in ➔doubly b-tagged events
top related