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401-04-04 Calorimeter Trigger. Sridhara Dasu, University of Wisconsin DOE CD1 Review 26 August 2013. The Grand Plan for Trigger Upgrade. LHC Calendar 2012: Discovered the Higgs 2013-2014: Make upgrades to handle 14 TeV + 2 x 10 34 cm –2 s –1

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401 04 04 calorimeter trigger

401-04-04 Calorimeter Trigger

Sridhara Dasu, University of Wisconsin

DOE CD1 Review

26 August 2013

DOE CD1 Review - US CMS Upgrade - Trigger

the grand plan for trigger upgrade
The Grand Plan for Trigger Upgrade

LHC Calendar

  • 2012: Discovered the Higgs
  • 2013-2014: Make upgrades to handle 14 TeV + 2 x 1034 cm–2 s–1
  • 2015-2017: Discover new high energy physics phenomena using data at 14 TeV + study the Higgs + EWSB mechanism
  • 2018-2019: Make upgrades to handle 14 TeV + 5 x 1034 cm–2 s–1
  • 2020-2022: Program is dependent on what we find by 2018

CMS Plans

  • 2013: Finalize trigger designs and prototyping
  • 2014: Construct the trigger modules
  • 2015: Early operation with pre-production modules (Stage-1)
  • 2016-2017: Operations with fully upgraded trigger (Stage-2)

Rapid plan to ensure success in 2015-2017 run!

  • Plans backed up by thorough prototyping that is already underway

DOE CD1 Review - US CMS Upgrade - Trigger

technical opportunity
Technical Opportunity

FPGA & Telecom technology advances

  • Ubiquitous 10 Gbps links
  • FPGAs with 72 rx/tx links with built in serdes
    • Xilinx Vertex-7 platform
    • Gigantic cores
    • DSP units, BRAM and Embedded processors
  • Fiber optic components
    • Avago mini-pods with 12x
  • Ripe time to upgrade from VME to uTCA

LHC long shutdown 2013-2014

  • Sufficient time for copper  optical transition for inputs
  • Ensures that upgraded electronics is ready for operation in 2016
  • Partial upgrade operation from 2015 itself

DOE CD1 Review - US CMS Upgrade - Trigger

calorimeter trigger layers 1 2
Calorimeter Trigger Layers 1 & 2

US:

UK:

Vienna:

DOE CD1 Review - US CMS Upgrade - Trigger

algorithms
Algorithms

Algorithm layers

  • First layer builds local clusters of energy deposits
    • Determines energy and cluster type (EM or Hadronic)
  • Second layer builds triggerable objects from clusters
    • Electron/Photon, Tau, Jet, MET, …

Mapping to architectures

  • Traditional architecture
    • Algorithm layer-1 maps to physical layer-1 electronics
      • Key feature: nearest-neighbor sharing
      • Sufficient to build clusters locally
    • Algorithm layer-2 maps to physical layer-2 electronics
      • All clusters available in one FPGA
  • Time multiplexing architecture
    • All primitive data passes through one FPGA
    • Potential for clever on-the-fly processing, if feasible/necessary

DOE CD1 Review - US CMS Upgrade - Trigger

current upgraded calo trigger

HCAL Optical Splitters

HCAL

Energy

ECAL

Energy

Regional

Calo Trigger

Global

Calo Trigger

HF

Energy

HCAL

Energy

Layer 1

Calo Trigger

Upgrade L1 Trigger System

Current L1 Trigger System

EM

candidates

Region

energies

Layer 2

Calo Trigger

Current & Upgraded Calo Trigger

Copper

Optical

Risk mitigation by operating current and adiabatic stages of upgrade CT concurrently

mHTR

HTR

TCC

mHTR

oSLB

oRM

CTP

US

US

oRSC

UK

UK

MP7

DOE CD1 Review - US CMS Upgrade - Trigger

calorimeter trigger components
Calorimeter Trigger Components

DOE CD1 Review - US CMS Upgrade - Trigger

algorithm studies
Algorithm Studies

Stage-1 uses clusters from RCT+HF processed by new mTCA cards

  • Adiabatic improvements to calorimeter trigger dataflow
  • Algorithm stage takes advantage of larger FPGA resources
  • Performance of the “revised” algorithms is very good
    • eGammaTau studied by FNAL/Wisconsin 
    • eGamma and muon isolation studied by UCSD 
    • Muon isolation and b-jet tagging with muons studied by Ohio 
    • Heavy Ion jet cleanup studied by MIT 
    • Improved jet finding with PU subtraction by UIC 
  • Further improvements using full ECAL granularity in Stage-1
    • Improved eGammaTau isolation & position (FNAL, Wisconsin)
    • Pile-up handling with lower LSB for ECAL (FNAL, Wisconsin)
    • Improved jet position and PU subtraction (Davis)

DOE CD1 Review - US CMS Upgrade - Trigger

electron photon trigger
Electron / Photon Trigger

Improved control on isolation

  • Factor of 2-3 reduction in rate with small loss in efficiency

DOE CD1 Review - US CMS Upgrade - Trigger

tau trigger
Tau Trigger

Big improvement in efficiency with ~10X rate reduction!

Current tau trigger has large and negative PU dependence

DOE CD1 Review - US CMS Upgrade - Trigger

jet triggers
Jet Triggers

Single jet thresholds similar to current

  • Multi-jet trigger thresholds better in upgrade (PU sub.)
  • Small improvement in efficiency turn-on

HT = SPTJets

Single jet

Quad jet

DOE CD1 Review - US CMS Upgrade - Trigger

physics performance summary
Physics Performance Summary

Average Improvement: 17% (Low Lumi) & 40% (High Lumi)

DOE CD1 Review - US CMS Upgrade - Trigger

technical feasibility
Technical Feasibility
  • Prototypes for all major cards exist & have passed tests
  • Upgrade is based upon common μTCA hardware platform also used by HCAL & other CMS systems
  • Upgrade trigger is replacing existing trigger hardware built by the same team → interfaces well understood
  • Same team wrote software & firmware for existing trigger system → scope & requirements well understood
  • Requirements are frozen in approved Trigger TDR

DOE CD1 Review - US CMS Upgrade - Trigger

calo trigger team experience
Calo Trigger Team Experience
  • Wesley Smith
    • CMS Trigger Project Manager 1994-2007,
    • Trigger Coordinator 2007 – 2012
    • US CMS L2 Trigger Project Manager 1998 – present
  • Sridhara Dasu
    • US CMS L3 Manager for Calorimeter Trigger, 1998 – present
    • Author of original & upgrade cal. trig. Algorithms 1994 – present
  • Pam Klabbers – Operations & Testing
    • CMS RCT Operations Manager (more than a decade on RCT project)
    • CMS Deputy Trigger Technical Coordinator
  • Tom Gorski– Hardware & Firmware
    • Over a decade of engineering on the CMS Calorimeter Trigger
  • Mathias Blake – Firmware
    • New to project -- 5 years Applications Engineer at Xilinx, 2 years FPGA Engineer at DRS Technologies, 3 years FPGA Design Engineer at Dolby Labs
  • JesTikalsky and Evan Friis – Software
    • Providing prototype testing software (Friis has experience with current RCT)

DOE CD1 Review - US CMS Upgrade - Trigger

calorimeter trigger wbs detail
Calorimeter Trigger WBS Detail

Muon

Trigger

M&S paid byCMS-France

DOE CD1 Review - US CMS Upgrade - Trigger

hcal ecal trigger primitives
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 401.04.04.06)
    • One optical link to optical Receiver Module (oRM) on RCT (WBS 401.04.04.05)
      • 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 channels @ 1.2 Gbps

 4.8 Gbps

DOE CD1 Review - US CMS Upgrade - Trigger

401 04 04 02 ctp card concept
401.04.04.02: CTP Card Concept
  • Main processor card
    • Virtex-7 690T for processing
    • ZYNQ for TCP/IP + linux
    • 60 10G optical Input links
    • 36 10G opticalOutput links
    • Function: Find ET clusters & transmit to Layer-2
  • Card Count = 46
    • 36 total + 8 spares + 2 test setups

1V 30A Supply

3.3V Supply

1.5V 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)

DOE CD1 Review - US CMS Upgrade - Trigger

ctp virtex 6 prototype exists
CTP: Virtex-6 Prototype Exists

JTAG/USB Console

Interface Mezzanine

Power Modules

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

DOE CD1 Review - US CMS Upgrade - Trigger

ctp basis of estimate hardware
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)

DOE CD1 Review - US CMS Upgrade - Trigger

ctp basis of estimate effort
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
        • JesTikalsky
      • Bulk of testing software from post-doc and graduate student
        • Pam Klabbers, Evan Friisand graduate students will develop software
    • Board and Firmware/Software done by the same group (Wisconsin) results in efficiencies

DOE CD1 Review - US CMS Upgrade - Trigger

401 04 04 03 crosspoint io card u wisconsin
401.04.04.03: Crosspoint IO Card– U. Wisconsin

(2/crate x 3 crates = 6 + spares)

  • 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

Controller (MMC and link mgmt)

4X Avago

AFBR-79EQDZ QSFP+ Module

Positions

Backplane Rx/TxRedriver ICs

(top and bottom sides)

4x4 Lane Bidirectional Multi Gig Backplane Connections

DOE CD1 Review - US CMS Upgrade - Trigger

401 04 04 04 ctp infrastructure vadatech vt894 crate test setup
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

DOE CD1 Review - US CMS Upgrade - Trigger

ctp risk and mitigation strategy
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

DOE CD1 Review - US CMS Upgrade - Trigger

calorimeter trigger risk mitigation
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 descopedduring 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 Outputto GCTon 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 notavailable in 2015

DOE CD1 Review - US CMS Upgrade - Trigger

prototypes status optical links
Prototypes Status (Optical Links)
  • Input/Output verified – low bit error rate – clear eyes

oRSC to CTP6 (11x 6.4 Gbps links)

CTP6 to CTP6 (48x 6.4 Gbps links)

oRSC to MP7(4x 6.4 Gbps links)

DOE CD1 Review - US CMS Upgrade - Trigger

hcal tpg to ctp integration test
HCAL TPG to CTP Integration Test
  • 12-links tested at 6.4 Gbps – no errors

DOE CD1 Review - US CMS Upgrade - Trigger

running linux on ctp6 fpga petalinux
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

DOE CD1 Review - US CMS Upgrade - Trigger

demonstrators critical integration tests
Demonstrators & Critical Integration Tests
  • mHTR to CTP6 integration test at Madison (done)
    • Wisconsin/Minnesota : 12 links operated successfully
  • oRSCto 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

DOE CD1 Review - US CMS Upgrade - Trigger

adiabatic upgrade timeline
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

DOE CD1 Review - US CMS Upgrade - Trigger

ctp production installation etc
CTP: Production, Installation, etc
  • Launch Production (Buy parts, fabricate PCBs): 1QFY2014
  • Deliver Stage-1 Calorimeter Trigger (4 CTP boards + 1 crate + oRSCs): 4QFY2014
  • Initial operation at CERN (Firmware for Stage-1 + HF clusters): 2QFY2015
  • Deliver Stage-2 Calorimeter Trigger(All CTPs, CIOx, 3 crates): 2QFY2015
  • Test High Luminosity Operation of Calorimeter Trigger (All Firmware for Stage-2): 4QFY2016

DOE CD1 Review - US CMS Upgrade - Trigger