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L2 CAL Status. Vadim Rusu. For the magnificent L2CAL team. The goal. MET+2 JETS. Improve the L2 MET resolution so that we can run at lower MET at L2 L1 only uses 8/10 bits No L2 calculation in the current system Change the jet clustering so that we can control the rates at high luminosity

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slide1

L2 CAL Status

Vadim Rusu

For the magnificent L2CAL team

the goal
The goal

MET+2 JETS

  • Improve the L2 MET resolution so that we can run at lower MET at L2
    • L1 only uses 8/10 bits
    • No L2 calculation in the current system
  • Change the jet clustering so that we can control the rates at high luminosity
    • Current L2 clustering – pacman style

JET40

L2 CAL status

the design
The design

L2CAL Cluster

Finder Dcas

L2 Decision Crate

New Hardware Path

L2 CPU

L2 CPU

L1CAL

Dirac Board

Muon/XTRP/L1/SVT/XCES

Global L2 Decision

Add new hardware to send the towers straight to the L2 PC

Get new PC for better performance (about time anyway)

Everything to be commissioned parasitically

8-bits

10-bits Energy/Tower

Calorimeter

L2 CAL status

the project
The project
  • An international mini-collaboration
    • Fermilab
    • Chicago
    • Madrid
    • Padova
    • Penn
    • Pisa
    • Purdue

Started – Oct 2006

Completed - ASAP

L2 CAL status

the know how
The know-how

TIMING GOAL ~ 20 us

Pulsar Crate (6)

Pulsar Crate (6)

PC

Pulsar Crate (6)

  • Use PULSARs as receivers for the LVDS data from DIRAC
    • Need to interface the 40 bit cables with the PULSAR
    • Build Mezzanine card
  • Serialize the data in Slink format
    • Receive on PC through Slink-PCI boards

6 slink

outputs

96 LVDS cables

80 MhZ

96 LVDS cables

32-bit @ 40 MhZ

Slink merger

Pulsars

(8)

6 slink

outputs

32-bit @ 40 Mhz

80 MhZ

80 MhZ

40-bit word/cable

@ CDF_clk (132 ns)

6 slink

outputs

Clustering

timing ~ 10 us

80 MhZ

Data transfer latency on average within ~10 us

L2 CAL status

the tool
The tool

EM HAD EM HAD

FPGA

Altera

L2 CAL mezzanine card

10bits x4 = 40 @ cdfclk (132ns)

input data

per cable

Pulsar

side

LVDS Connector

40

JTAG

160

CMC Connectors to

the pulsar

Pulsar

front panel

L2 CAL status

the tool1
The tool
  • Built at UC in record time
    • Thanks Henry and e-shop
  • Tested and commissioned revision 1.0 over the holidays
    • Worked out of the box

Ted makes good for

the bet he lost.

L2 CAL status

the pieces
The pieces
  • Mezzanine design
    • Laura
  • Testing/Checkout
    • Lucas, Miguel
  • Firmware
    • Marco, Laura
  • FER code
    • Massimo, Laura
  • Simulation package
    • Simone D., Gene F.
  • Monitoring
    • Giorgio + Simone P., Michael – Wojtek/Carla – consulting
  • PC infrastructure and algo
    • Gene + Kristian Hahn – consultant
  • PC interface
    • Anadi
  • Preparing the celebrations (parties, happy hours, etc…)
    • myself

L2 CAL status

the status
The status
  • Boards – arrive over the month of February
    • Mezzanine, Slink, AUX (Henry – UC)
      • Front panels and strain relief (Richard – UC)
    • Pulsars (Paola – Pisa)
  • Cables – 80% in hand
    • Cable map (thanks JDL)
  • Software – final testings
  • Firmware – stage 1 ready to go

L2 CAL status

the plan
The plan
  • Start splitting the cables one DCAS crate at a time starting next week
  • Have half the DCAS system split and parasitically running by the end of February
  • March have all system running parasitically
  • April – new trigger tables
  • May – Project completed
    • 10 bit MET resolution
    • New Jet algorithm (cone based)

L2 CAL status

the future
The future
  • The L2 CAL trigger will be a very versatile system
  • What the new L2CAL will provide:
    • 10 bit MET at L2
    • Better L2 jet position
    • L2 jet closer to offline jets
  • What else?
    • Angular correlations (jets, MET)
    • Track jet matching
    • Dijet mass
  • New paradigm: Your offline analysis code can be implemented in the trigger
    • Use the L2 CAL simulation to do studies that will improve the trigger selection
    • Already starting on this in the context of HTTF

L2 CAL status

slide12

THE END

L2 CAL status