1. 401-04-04 Calorimeter Trigger
Sridhara Dasu, University of Wisconsin
DOE CD1 Review
26 August 2013
Sridhara Dasu, 26 August 2013
DOE CD1 Review - US CMS Upgrade - Trigger

2. Calorimeter Trigger WBS Detail←
Muon
Trigger
M&S paid by CMS-France
Sridhara Dasu, 26 August 2013
DOE CD1 Review - US CMS Upgrade - Trigger

3. Calorimeter Trigger Components
Type
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)
Sridhara Dasu, 26 August 2013
DOE CD1 Review - US CMS Upgrade - Trigger

4. HCAL & ECAL Trigger Primitives
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 )
One optical link to optical Receiver Module (oRM) on RCT (WBS )
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:
OSLB Output / oRM Input:
4x 1.2 Gbps
 4.8 Gbps
Sridhara Dasu, 26 August 2013
DOE CD1 Review - US CMS Upgrade - Trigger

5. 401.04.04.02: CTP Card Concept Virtex-7 VX690T FPGA
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 spares test setups
1.5V Supply
1V 30A Supply
3.3V Supply
CXP Module
12Tx + 12 Rx
2.5V Supply
CXP Module
12Tx + 12 Rx
Virtex-7 VX690T FPGA
12X Rx
ZYNQ
XC7Z030
EPP
12X Rx
CXP Module
12Tx + 12Rx
(CTP-6 BG View)
Sridhara Dasu, 26 August 2013
DOE CD1 Review - US CMS Upgrade - Trigger

6. CTP: Virtex-6 Prototype Exists
Power Modules
JTAG/USB Console
Interface Mezzanine
MMC Circuitry
Back End FPGA
XC6VHX250T/
XC6VHX380T
4X Avago AFBR-820B Rx Module
12x Multi Gig Backplane Connections
Front End FPGA
XC6VHX250T/
XC6VHX380T
Dual SDRAM for dedicated DAQ and TCP/IP buffering
Avago AFBR-810B Tx Module
Sridhara Dasu, 26 August 2013
DOE CD1 Review - US CMS Upgrade - Trigger

7. CTP-6 Intraboard link eyepattern
Validation of signal integrity on CTP6
Sridhara Dasu, 26 August 2013
DOE CD1 Review - US CMS Upgrade - Trigger

8. HCAL TPG to CTP Integration Test
12-links tested at 6.4 Gbps – no errors
Sridhara Dasu, 26 August 2013
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
Running on CTP-6 back end FPGA (`VHX250T)
Important step towards CTP-7 ZYNQ-based Linux
Sridhara Dasu, 26 August 2013
DOE CD1 Review - US CMS Upgrade - Trigger

10. Advantage of Linux System on Chip
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 custom firmware or kernel software for monitoring and control
Postdocs are already using Petalinux 
Sridhara Dasu, 26 August 2013
DOE CD1 Review - US CMS Upgrade - Trigger

11. CTP: Basis of Estimate - Hardware
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
3 690Ts donated by Xilinx
5 690Ts purchased from Xilinx
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
DOE CD1 Review - US CMS Upgrade - Trigger

12. CTP: Basis of Estimate - Effort
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 complicated
Tom Gorski and Mathias Blake
Trigger algorithm firmware work is based on prior experience managing GCT project (UK)
Wesley Smith was L1 project manager overseeing GCT
Software effort is based on current RCT
Sophistication of embedded Linux / TCP and shorter timeline for implementation requires professional software effort
Jes Tikalsky
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
DOE CD1 Review - US CMS Upgrade - Trigger

13. 401.04.04.03: Crosspoint IO Card – U. Wisconsin
Function: For inter-board connections
Input/Output: 48x Gbps
Prototype exists
Fully tested
Firmware is minimal and exists
CIOX cost well known
Ready for production
(2/crate x 3 crates = 6 + spares)
Controller (MMC and link mgmt)
4X Avago
AFBR-79EQDZ QSFP+ Module
Positions
4x4 Lane Bidirectional Multi Gig Backplane Connections
Backplane Rx/Tx Redriver ICs
(top and bottom sides)
Sridhara Dasu, 26 August 2013
DOE CD1 Review - US CMS Upgrade - Trigger

14. 401.04.04.04: CTP Infrastructure: Vadatech VT894 Crate Test Setup
(Final system: 3 crates w/ 12 CTP7 ea. + 2 test setups + spare = 6)
TTC Downlink
U. Wisconsin designed backplane with dense card interconnects
manufactured & installed in commercial Vadatech VT892 Crate available in Vadatech Catalog
BU AMC13
UW CTP-6
UW CTP-6
UW Aux
Vadatech MCH
Sridhara Dasu, 26 August 2013
DOE CD1 Review - US CMS Upgrade - Trigger

15. CTP: Risk and Mitigation Strategy
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
DOE CD1 Review - US CMS Upgrade - Trigger

16. Calorimeter Trigger Risk Mitigation
oRSC Function:
Conversion to optical
oRSC Input:
RCT egt and jet clusters
80 MHz Parallel ECL
oRSC Output:
6x copies at 6.4 Gbps optical
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
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 not available in 2015
Sridhara Dasu, 26 August 2013
DOE CD1 Review - US CMS Upgrade - Trigger

17. oRSC Card Status 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
Will be used for developing RCT readout validation in 2013
Sridhara Dasu, 26 August 2013
DOE CD1 Review - US CMS Upgrade - Trigger

18. oRSC-CTP6 Monitoring and Validation
Zero bit errors
10^-14 BER!
Sridhara Dasu, 26 August 2013
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
serves IPBus over TCP/IP
Forward IPBus packets over serial protocol to FPGA2
Able to readout arbitrary memory locations from both FPGAs
Receive upgrade commands for writing FPGA configuration images and additional Linux executables to onboard flash memory
Front End FPGA embedded processor running standalone app
Able to accept and decode IPBus Packets
Control or report status of all 48 fiber links
Read capture RAMs for all or selected fibers
Sridhara Dasu, 26 August 2013
DOE CD1 Review - US CMS Upgrade - Trigger

20. CTP Readout Configuration
Sridhara Dasu, 26 August 2013
DOE CD1 Review - US CMS Upgrade - Trigger

21. 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
Sridhara Dasu, 26 August 2013
DOE CD1 Review - US CMS Upgrade - Trigger

22. CTP6 / Linux Monitoring & Validation
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
Sridhara Dasu, 26 August 2013
DOE CD1 Review - US CMS Upgrade - Trigger

23. CTP / Linux Monitoring & Validation
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
Sridhara Dasu, 26 August 2013
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
DOE CD1 Review - US CMS Upgrade - Trigger

25. Demonstrators & Critical Integration Tests
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
DOE CD1 Review - US CMS Upgrade - Trigger

26. Adiabatic Upgrade Timeline
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
DOE CD1 Review - US CMS Upgrade - Trigger

27. CT Milestones Activity ID Activity Name Target Completion Milestone
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
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
Sridhara Dasu, 26 August 2013
DOE CD1 Review - US CMS Upgrade - Trigger

28. Backup Slides for Q&A Sridhara Dasu, 26 August 2013
DOE CD1 Review - US CMS Upgrade - Trigger

29. Evolution: Stage-1 Upgrade in 2015
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
HCAL
energy
ECAL
energy
Add to bring in finer grain EM clusters
US Items:
oRSCs,
oSLB/oRM commissioning
CTP Layer 1 Processors
RCT RO+Testing CTP
UK Items:
MP7 Layer 2 Processors
36 mHTRs HF
energy
Regional
Calo Trigger
2 CTP7s 9 CTP7s
Layer 1 Processors
oRSC
oRM
oSLB
ECAL & HF Clusters
Half-tower position
RCT RO + Testing
Global
Calo Trigger
4x4 E+H Clusters
2x1 E+H Clusters
2-bit region ID
2 CTP7s
Spare
Layer 2
Calo Trigger
Layer 2
Calo Trigger
Heavy Ion
Muon
4 MP7s
Jets & Sums
eGammaTau
GCT fallback remains
Layer 2 Processors
With just a fraction of final cards or even prototypes, derive many benefits of full upgrade, incl. muon isolation
Sridhara Dasu, 26 August 2013
DOE CD1 Review - US CMS Upgrade - Trigger

30. Calorimeter Trigger Upgrade Options
Two modes of connectivity required
Layer 1:
Pipelined: forms various cal. clusters to send to L2 nodes for different triggers
TMT: distributes all cal. Info. in event to one multiplexed L2 node for all triggers
Layer 2:
Finds different trigger objects using clusters or scanning (TMT) all cal. info. & then demultiplexing
Keep new trigger flexible to adapt to needs of evolving CMS physics program
Both architectures have two processing layers
Layer 1 optimized for backplane connectivity, Layer 2 for optical
TMT architecture chosen as initial baseline
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
DOE CD1 Review - US CMS Upgrade - Trigger

31. Pipelined Calorimeter Trigger (Stage-1)
Each Layer 2 processor calculates suite of trigger paths
(Default plan till all ECAL & HCAL TPs are available in optical format.)
To GT
To GT
Trig Path 1
(MP7)
Trig Path 2
(MP7)
Trig Path 3
(MP7)
Trig Path 4
(MP7)
Trig Path 5
(MP7)
Trig Path 6
(MP7)
 Crate G
Crate G
Up to 12
Trigger
Path Modules
Each Trigger Path MP7 rcvs 48 total 1st-Level 9.6 Gbps (2/region)
Layer 1 and RCT send dedicated clusters to Layer 2
Fiber patch panel
Each 1st-Level CTP7 Drives 2 fibers out to 6-12 Trigger 9.6 Gbps
Calorimeter Trigger Processor (CTP) Card
oRSC () () () ()
CTP () () () () () () () () ()
CTP () () () () ()
Current RCT
Crate A
Crate C HF
ECAL
HBHE HF
Sridhara Dasu, 26 August 2013
DOE CD1 Review - US CMS Upgrade - Trigger

32. Pipelined Calorimeter Trigger (Stage-1)
Each Layer 2 processor calculates suite of trigger paths
(Default plan till all ECAL & HCAL TPs are available in optical format.)
To GT
To GT
Trig Path 1
(MP7)
Trig Path 2
(MP7)
Trig Path 3
(MP7)
Trig Path 4
(MP7)
Trig Path 5
(MP7)
Trig Path 6
(MP7)
 Crate G
Crate G
Up to 12
Trigger
Path Modules
Each Trigger Path MP7 rcvs 48 total 1st-Level 9.6 Gbps (2/region)
Layer 1 sends dedicated clusters to Layer 2
Fiber patch panel
6 x 8-fiber ribbons for Lateral Network
4.8 Gbps)
Each 1st-Level CTP7 Drives 2 fibers out to 6-12 Trigger 9.6 Gbps
Calorimeter Trigger Processor (CTP) Card
Crosspoint I/O (CIO) Card
CIO-L
CTP ()
CTP ()
CTP ()
CTP ()
CIO-U
CIO-L
CTP ()
CTP ()
CTP ()
CTP ()
CIO-U
CIO-L
CTP ()
CTP ()
CTP ()
CTP ()
CIO-U
Current RCT
Crate A
Crate B
Crate C
ECAL HF
ECAL HF
ECAL HF
HBHE
Sridhara Dasu, 26 August 2013
DOE CD1 Review - US CMS Upgrade - Trigger

33. Pipelined Calorimeter Trigger Upgrade
Each Layer 2 processor calculates suite of trigger paths
(Default plan till all ECAL & HCAL TPs are available in optical format.)
To GT
To GT
Trig Path 1
(MP7)
Trig Path 2
(MP7)
Trig Path 3
(MP7)
Trig Path 4
(MP7)
Trig Path 5
(MP7)
Trig Path 6
(MP7)
 Crate G
Crate G
Up to 12
Trigger
Path Modules
Each Trigger Path MP7 rcvs 48 total 1st-Level 9.6 Gbps (2/region)
Layer 1 sends dedicated clusters to Layer 2
2x288-fiber patch panel (2x24×12-fiber optical ribbons in & out)
6 x 8-fiber ribbons for Lateral Network
4.8 Gbps)
Each 1st-Level CTP7 Drives 2 fibers out to 6-12 Trigger 9.6 Gbps
Calorimeter Trigger Processor (CTP) Card
Crosspoint I/O (CIO) Card
CIO-L
CTP
CTP
CTP
CTP
CTP
CTP
CTP
CTP
CIO-U
CIO-L
CTP
CTP
CTP
CTP
CTP
CTP
CTP
CTP
CIO-U
CIO-L
CTP
CTP
CTP
CTP
CTP
CTP
CTP
CTP
CIO-U
Crate A
Crate B
Crate C
ECAL
HCAL
ECAL
HCAL
ECAL
HCAL
Sridhara Dasu, 26 August 2013
DOE CD1 Review - US CMS Upgrade - Trigger

34. TMT Calorimeter Trigger Upgrade
Time-multiplexed architecture, calo data from an entire event processed by a single processor
Sridhara Dasu, 26 August 2013
DOE CD1 Review - US CMS Upgrade - Trigger

35. e / g / t Position Resolution
Significantly improved position resolution
Further enhanced with optional Stage-1
Sridhara Dasu, 26 August 2013
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
DOE CD1 Review - US CMS Upgrade - Trigger

37. Tau Trigger Big improvement in efficiency with ~10X rate reduction!
Current tau trigger has large and negative PU dependence
Sridhara Dasu, 26 August 2013
DOE CD1 Review - US CMS Upgrade - Trigger

38. Jet Triggers Single jet thresholds similar to current
Multi-jet trigger thresholds better in upgrade (PU sub.)
Small improvement in efficiency turn-on
HT = S PTJets
Single jet
Quad jet
Sridhara Dasu, 26 August 2013
DOE CD1 Review - US CMS Upgrade - Trigger

39. Physics Performance Summary
Process
(x2 improvement highlighted)
1.1 x 1034 cm–2 s–1
2.2 x 1034 cm–2 s–1
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%
89.3%
H(WW(emnn))
97.6%
99.4%
86.9%
99.3%
H(WW(menn))
99.6%
99.5%
90.7%
99.7%
StopbWce, jets (600 – 450 GeV)
55.8%
68.2%
50.3%
64.8%
StopbWcm, jets (600 – 450 GeV)
78.1%
81.6%
76.4%
84.5%
RPV Stopjets (200 GeV)
70.1%
43.6%
RPV Stopjets (300 GeV)
93.7%
79.7%
Average Improvement: 17% (Low Lumi) & 40% (High Lumi)
Sridhara Dasu, 26 August 2013
DOE CD1 Review - US CMS Upgrade - Trigger

40. Expected performance 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
DOE CD1 Review - US CMS Upgrade - Trigger

41. L=1.1x1034 cm-2s-1 with 50ns BX and 50 pile-up⎬
Single e/μ
Multijet
Sridhara Dasu, 26 August 2013
DOE CD1 Review - US CMS Upgrade - Trigger

42. L=2.2x1034 cm-2s-1 with 25ns BX and 50 pile-up⎬
Single e/μ
Multijet
Sridhara Dasu, 26 August 2013
DOE CD1 Review - US CMS Upgrade - Trigger

43. Physics studies 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 not
SUSY remains a leading candidate, but if it is so, must have light stops
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
DOE CD1 Review - US CMS Upgrade - Trigger

44. Benchmark channels considered to highlight improvements
Physics performance
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
DOE CD1 Review - US CMS Upgrade - Trigger

45. Higgs summary Sridhara Dasu, 26 August 2013
DOE CD1 Review - US CMS Upgrade - Trigger

46. SUSY summary Sridhara Dasu, 26 August 2013
DOE CD1 Review - US CMS Upgrade - Trigger

47. ⎬ ⎬ Higgs summary Single e/μ Tau ID & Single e/μ
Sridhara Dasu, 26 August 2013
DOE CD1 Review - US CMS Upgrade - Trigger

48. SUSY summary Multijet Sridhara Dasu, 26 August 2013
DOE CD1 Review - US CMS Upgrade - Trigger

49. Heavy Ion performance Readout rate is limited by data volume to 3 kHz
Investigation of flavour dependence in jet quenching ➔ jet asymmetry in doubly b-tagged events
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
Sridhara Dasu, 26 August 2013
DOE CD1 Review - US CMS Upgrade - Trigger