L2 CAL Status

1. L2 CAL Status Vadim Rusu For the magnificent L2CAL team

2. 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

3. 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

4. The project • An international mini-collaboration • Fermilab • Chicago • Madrid • Padova • Penn • Pisa • Purdue Started – Oct 2006 Completed - ASAP L2 CAL status

5. 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

6. 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

7. 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

8. 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

9. 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

10. 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

11. 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

12. THE END L2 CAL status