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DØ L1Cal Trigger 10-th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS Budker Institute of Nuclear Physics Siberian Branch of Russian.

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Presentation on theme: "DØ L1Cal Trigger 10-th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS Budker Institute of Nuclear Physics Siberian Branch of Russian."— Presentation transcript:

1 DØ L1Cal Trigger 10-th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS Budker Institute of Nuclear Physics Siberian Branch of Russian Academy of Science Novosibirsk, Russia Presented for the D-Zero collaboration by Dan Edmunds Michigan State University, East Lansing, Michigan, USA 1 March 2008

2 Daniel Edmunds10-th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS Fermilab

3 Daniel Edmunds10-th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS Fermilab  Fermi National Laboratory  Near Chicago, Illinois, USA  Tevatron Collider 2 km in diameter  Proton-Antiproton collisions  New Main Injector for Run II in 2001  36 Beam Crossings per turn, 396 ns apart  Center-of-mass energy 1.96 TeV  Instantaneous Luminosity >10 32 cm −2 s −1

4 Daniel Edmunds10-th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS DØ Collaboration

5 Daniel Edmunds10-th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS D-Zero Detector(s)

6 Daniel Edmunds10-th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS D-Zero Calorimeter

7 Daniel Edmunds10-th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS Calorimeter Readout Path

8 Daniel Edmunds10-th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS Typical BLS Trigger Tower Analog Signals EMHD

9 Daniel Edmunds10-th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS DZero Trigger System

10 Daniel Edmunds10-th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS L1 & L2 Trigger Components

11 Daniel Edmunds10-th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS L1Cal Trigger Sub-System

12 Daniel Edmunds10-th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS L1Cal Trigger Sub-System

13 Daniel Edmunds10-th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS Sliding Window Algorithm and Trigger Tower Clusters

14 Daniel Edmunds10-th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS Electron EM/HD Fraction and Isolation Test

15 Daniel Edmunds10-th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS L1Cal Card Count

16 Daniel Edmunds10-th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS ADF Card

17 Daniel Edmunds10-th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS ADF Card

18 Daniel Edmunds10-th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS ADF Channel

19 Daniel Edmunds10-th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS ADF Crate

20 Daniel Edmunds10-th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS TAB Card

21 Daniel Edmunds10-th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS Serial Digital Computation Bit-Serial AdderBit-Serial Comparator

22 Daniel Edmunds10-th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS TAB Card

23 Daniel Edmunds10-th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS GAB Card

24 Daniel Edmunds10-th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS GAB Card

25 Daniel Edmunds10-th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS TAB/GAB System Path Trigger Path, Readout Path, and Test Memories

26 Daniel Edmunds10-th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS Control & Communications

27 Daniel Edmunds10-th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS L1Cal Trigger Terms  64 Trigger Input Terms to Trigger Framework  1-, 2-, and 3- Jet Terms  1-, and 2- EM Terms without Isolation  1-, and 2- EM Terms with Isolation  Tau Terms  Topological Terms, e.g. oNo other jet opposite in phi oBack to Back EM  Total Et Terms  Missing Et Terms

28 Daniel Edmunds10-th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS L1Cal Trigger Sub-System  Example of Trigger Term sent to the Trigger Framework  CSWEM(2,10.,3.2) : >= 2 Electron, >=10 GeV, |eta|<=3.2  CSWEI(1,16.,3.2) : >=1 Isolated EM, >=16 GeV, |eta|<=3.2  CSWJT(1,20.,3.2) : >=1 Jet, >=20 GeV, |eta|<=3.2  CSWMET(24.) : Missing Et >= 24 GeV  References:  http://www.nevis.columbia.edu/~evans/l1cal/

29 Daniel Edmunds10-th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS Calibration Comparing L1Cal Et to Precision Readout Et EMHD

30 Daniel Edmunds10-th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS Active Control of Trigger Tower Zero Energy Response  L1Cal TCC now automatically tracks and adjusts the Zero Energy Response for the Transverse Energy of each Trigger Tower, at the output from the ADF cards, i.e. the input to the TAB Cards, to remain at the design response of 8 counts = 0 GeV.  For each Trigger Tower, the Zero Energy Response Drift is measured from the average of 1008 samples (28 turns) of Live Crossing Energy.  If the measured drift is below a programmed threshold (0.5 counts) TCC immediately applies 50% of the correction needed to correct the measured drift.  If the measured drift is above the threshold, TCC does not make any correction and waits until the next sample to decide if this is a spike or a step change. At the next snapshot, and if this was a spike, do nothing and return to the 50% correction mode for future correction cycles. If this is a step, do the full correction instantly and return to the 50% method for future corrections.  These decisions are taken on a tower by tower basis.

31 Daniel Edmunds10-th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS Acronyms BLS = Calorimeter Base Line Subtractor Card ATC = BLS Cable to ADF Transition Card ADF = ADC and Digital Front-End Card SCLD = Serial Command Link Distributor TAB = Trigger Algorithm Board GAB = Global Algorithm Board VME/SCL = VME & SCL Control Path to TAB/GAB

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