Muon Track-Finder Trigger Darin Acosta University of Florida

Muon Track-Finder Trigger Darin Acosta University of Florida May, 2003 US CMS DOE/NSF Review, 19 -21 May 2003 1

CSC Muon Trigger Scheme EMU Trigger On-Chamber Trigger Primitives Trigger Motherboard (UCLA) Strip FE cards Muon Port Card (Rice) LCT 3 -D Track-Finding and Measurement Sector Receiver/ Processor (U. Florida) OPTICAL FE SR/SP MPC LCT 3 / port card TMB FE 2 / chamber Wire LCT card Wire FE cards RIM RPC Interface Module Combination of all 3 Muon Systems US CMS DOE/NSF Review, 19 -21 May 2003 SP 3 / sector In counting house RPC 4 CSC Muon Sorter (Rice) DT 4 4 Global Trigger 4 Global L 1 2

Muon Track-Finding • Link trigger primitives into 3 D tracks • Measure p. T, , and in non-uniform fringe field • Send highest quality candidates to Global Trigger • Partitioned into 60° sectors that align with DT chambers US CMS DOE/NSF Review, 19 -21 May 2003 3

Basis of Track-Finding Logic Dh Road Finder: • Check if track segment is in allowed trigger region in h. • Check if Dh and h bend angle are consistent with a track originating at the collision vertex. 1 2 IP Df 2 f Road Finder: 1 • Check if Df is consistent with f bend angle f. B measured at each station. • Check if Df in allowed range for each h window. IP Quality Assignment Unit: • Assigns final quality of extrapolation by looking at output from h and f road finders and the track segment quality. US CMS DOE/NSF Review, 19 -21 May 2003 Extrapolation Units utilize 3 -D information for trackfinding. 4

PT Measurement Df Pt LUT 2 4 MB PT Can use information from up to 3 chambers 1 Pt = f(Df 12, Df 23 , ) IP Residual Plot Constant Pt Contours for: 3, 5 , and 10 Ge. V s. Res=22% US CMS DOE/NSF Review, 19 -21 May 2003 5

L 1 Trigger Table (L=2× 1033) Only (endcap) muon triggers have low enough thresholds to allow a B-physics program at CMS in addition to the high PT physics US CMS DOE/NSF Review, 19 -21 May 2003 6

Trigger is Extensible ME 1 Single Te. V Events with neutron background Without ME 4/1: e = 72% With AU Corrections: e = 86. 3% De/e = 20% US CMS DOE/NSF Review, 19 -21 May 2003 X ME 2 ME 3 ME 4 X X X • With re-scope of ME 4/1, trigger logic can be modified to take advantage of redundancy and remove bad hits (hardware I/O can always accept ME 4) • Improvement in acceptance and PT assignment yields 20% increase in efficiency in forward region 7

1 st Prototype Track-Finder Tests Sector Processor (Florida) Sector Receiver Clock Control (UCLA) Board (Rice) SBS VME Interface Custom Channel. Link Backplane (Florida) Results included in Trigger TDR (2000) US CMS DOE/NSF Review, 19 -21 May 2003 Muon Port Card (Rice) Very successful, but overall CSC latency was too high New 2002 design improves latency 8

CSC Track-Finder Crate Muon Sorter SR SR SR / / / SP SP SP MS CCB Clock and Control Board SBS 620 Controller Second generation prototypes SR SR SR / / / SP SP SP Sector Processor From MPC (chamber 4) From MPC (chamber 3) From MPC (chamber 2) From MPC (chamber 1 B) From MPC (chamber 1 A) To DAQ Single Track-Finder Crate Design with 1. 6 Gbit/s optical links Custom 6 U GTLP backplane for interconnections US CMS DOE/NSF Review, 19 -21 May 2003 9

Combined SR/SP 2002 • Delays with complex layout using in-house tools • Sent to industry for completion of layout using Cadence Allegro • Final board takes 16 layers • 3 boards manufactured and stuffed US CMS DOE/NSF Review, 19 -21 May 2003 10

SP 2002 Main Board (SR Logic) DC-DC Converter EEPROM Phi Global LUT VME/ CCB FPGA Eta Global LUT Phi Local LUT TLK 2501 Transceiver To/from custom GTLP backplane Front FPGA Optical Transceivers • 15 x 1. 6 Gbit/s Links US CMS DOE/NSF Review, 19 -21 May 2003 3 SRs 11

SP Trigger Logic From SP 2000 to SP 2002 mezzanine card (5 manufactured) Xilinx Virtex-2 XC 2 V 4000 ~800 user I/O (Mezzanine card is also used for CSC sorter) US CMS DOE/NSF Review, 19 -21 May 2003 12

Tests underway… US CMS DOE/NSF Review, 19 -21 May 2003 13

Optical Link Tests Currently we are testing 3 optical links in a MPC to SP chain test • One test uses the pseudo-random number test built into the TLK 2501 chipset • Another uses software that downloads data into the MPC buffers and explicitly reads out and compares the data received by the SP • The CCB is used for control and clock signals Software, firmware, and tests are still ongoing US CMS DOE/NSF Review, 19 -21 May 2003 14

Remaining Crate Tests Foreseen • • SP optical link (all 15) tests SR LUT memory tests SP track-finding logic tests (mezzanine card) Multi-MPC to SP crate tests SP Muon Sorter crate tests SP EMU DAQ board (DDU) tests SP DT Track-Finder interface tests These tests are expected to take place during this summer and Fall US CMS DOE/NSF Review, 19 -21 May 2003 15

Beam Test Plans Plan to test CSC Trigger all the way to the Track-Finder in beam tests at CERN during May/June • Complete chain test from 2 detectors to peripheral crate electronics to Track-Finder crate electronics! Our goal is to validate that trigger primitives are found efficiently on correct BX and successfully received over optical links • Record as much data as possible under various detector configurations for future track identification studies US CMS DOE/NSF Review, 19 -21 May 2003 16

Personnel Professors • Darin Acosta (Florida), Robert Cousins (UCLA), Jay Hauser (UCLA), Paul Padley (Rice) Postdocs • Sang-Joon Lee (Rice), Holger Stoeck (Florida), Slava Valouev (UCLA), Martin Von der Mey (UCLA), Song Ming Wang (Florida) Students • Brian Mohr (UCLA), Jason Mumford (UCLA), Greg Pawloski (Rice), Bobby Scurlock (Florida), Engineers • Alex Madorsky (Florida), Mike Matveev (Rice), Ted Nussbaum (Rice), Alex Tumanov (Rice - Software) Collaborating engineers (PNPI) • Victor Golovtsov, Lev Uvarov US CMS DOE/NSF Review, 19 -21 May 2003 17