Скачать презентацию DØ Level 1 Trigger Presented for the D-Zero Скачать презентацию DØ Level 1 Trigger Presented for the D-Zero

97567f7fd5b8cbc5d0ab7008a9cd5512.ppt

  • Количество слайдов: 72

DØ Level 1 Trigger Presented for the D-Zero collaboration by Dan Edmunds Michigan State DØ Level 1 Trigger Presented for the D-Zero collaboration by Dan Edmunds Michigan State University, East Lansing, Michigan, USA 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS Budker Institute of Nuclear Physics Siberian Branch of Russian Academy of Science Novosibirsk, Russia 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 5 March 2008

Outline q Introduction v Fermilab v DZero v Triggering at D-Zero q q q Outline q Introduction v Fermilab v DZero v Triggering at D-Zero q q q q L 1 Trigger Sub-Systems Trigger Framework Serial Command Link Control of the TFW Monitoring of the TFW Online Luminosity Measurement Conclusion Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 2

Disclaimer q This will NOT be a Physics talk but rather a more technical Disclaimer q This will NOT be a Physics talk but rather a more technical talk concentrating on the design concepts and implementation of the D-Zero Level 1 Trigger System. q Technical Expertise: MSU was part of the original proposal and has been leading the overall design of the DØ Level 1 Trigger: v Run I: L 1 Trigger Framework, L 1 Cal, & L 1. 5 v Run IIa: New L 1/L 2 Framework & upgraded L 1 Cal v Run IIb: New L 1 Cal (with Saclay & Columbia) v Continuing: Operation and Maintenance Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 3

q Introduction v Fermilab v DZero v Triggering at D-Zero q q q q q Introduction v Fermilab v DZero v Triggering at D-Zero q q q q L 1 Trigger Sub-Systems Trigger Framework Serial Command Link Control of the TFW Monitoring of the TFW Online Luminosity Measurement Conclusion Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 4

Fermilab Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING Fermilab Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 5

Fermilab q Fermi National Laboratory v Near Chicago, Illinois, USA v Tevatron Collider 2 Fermilab q Fermi National Laboratory v Near Chicago, Illinois, USA v Tevatron Collider 2 km in diameter v Proton-Antiproton collisions v New Main Injector for Run II in 2001 v 36 Beam Crossings per turn, 396 ns apart v Center-of-mass energy 1. 96 Te. V v Instantaneous Luminosity >1032 cm− 2 s− 1 Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 6

Fermilab Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING Fermilab Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 7

Fermilab: Integrated Luminosity q Run II is Integrating Luminosity at a rate equaling all Fermilab: Integrated Luminosity q Run II is Integrating Luminosity at a rate equaling all of Run I every ~3 -4 weeks Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 8

Run II Beam Structure Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON Run II Beam Structure Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 9

Chronology q DZero experiment v Proposed in 1983; first data recorded in 1992 o Chronology q DZero experiment v Proposed in 1983; first data recorded in 1992 o Focus: high mass states, large Pt phenomena. v Run I: Discovery of the Top Quark in 1995 v Run II: new Central Tracker with Magnetic Field, Silicon Microstrip, Scintillating Fiber, new Trigger Framework and readout electronics (2001). v Run IIb: new inner layer for Silicon Tracker, and new L 1 Cal (2006). v Recently: e. g. Discovery of "triple-scoop" baryon Ξb Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 10

D-Zero Collaboration Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR D-Zero Collaboration Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 11

D-Zero Collaboration q > 600 on Author List q From > 80 Institutions q D-Zero Collaboration q > 600 on Author List q From > 80 Institutions q In 18 countries Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 12

D-Zero Detector q Three major subsystems: v Central Tracking detectors v Uranium/Liquid-Argon Calorimeters v D-Zero Detector q Three major subsystems: v Central Tracking detectors v Uranium/Liquid-Argon Calorimeters v Muon spectrometer. Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 13

D-Zero Detector(s) Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR D-Zero Detector(s) Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 14

Triggering at D-Zero q Three Levels of Triggering Daniel Edmunds 5 March 2008 10 Triggering at D-Zero q Three Levels of Triggering Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 15

Triggering at D-Zero q Event Data Path Daniel Edmunds 5 March 2008 10 -th Triggering at D-Zero q Event Data Path Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 16

q Introduction v Fermilab v DZero v Triggering at D-Zero q q q q q Introduction v Fermilab v DZero v Triggering at D-Zero q q q q L 1 Trigger Sub-Systems Trigger Framework Serial Command Link Control of the TFW Monitoring of the TFW Online Luminosity Measurement Conclusion Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 17

D-Zero Level 1 Trigger q Modular Design v L 1 Trigger Subsystems do not D-Zero Level 1 Trigger q Modular Design v L 1 Trigger Subsystems do not directly cause triggers v Partitionable Triggering and Readout Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 18

L 1 Trigger Sub-Systems : Luminosity Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL L 1 Trigger Sub-Systems : Luminosity Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 19

L 1 Trigger Sub-Systems : Luminosity q References: v LM upgrade: o IEEE NSS L 1 Trigger Sub-Systems : Luminosity q References: v LM upgrade: o IEEE NSS conference record and Fermilab conference note Upgrade of the D 0 luminosity monitor readout system. By D 0 Collaboration (John Anderson et al. ). FERMILAB-CONF-06470 -E, Dec 2006. 4 pp. Prepared for 2006 IEEE Nuclear Science Symposium (NSS), Medical Imaging Conference (MIC) and 15 th International Room Temperature Semiconductor Detector Workshop, San Diego, California, 29 Oct - 4 Nov 2006. v Run II LM: o Publication as well as a Fermilab conference note The D 0 Run II luminosity monitor. By D 0 Collaboration (Chyi-Chang Miao for the collaboration). FERMILAB-CONF-98 -395 -E, Dec 1998. 8 pp. To be published in the proceedings of 6 th International Conference on Advanced Technology and Particle Physics, Villa Olmo, Italy, 5 -9 Oct 1998. Published in Nucl. Phys. Proc. Suppl. 78: 342 -347, 1999. Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 20

L 1 Trigger Sub-Systems : L 1 Muon Daniel Edmunds 5 March 2008 10 L 1 Trigger Sub-Systems : L 1 Muon Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 21

L 1 Trigger Sub-Systems : L 1 Muon q References: v http: //www-d 0 L 1 Trigger Sub-Systems : L 1 Muon q References: v http: //www-d 0 online. fnal. gov/www/groups/calmuo/ v http: //atlas. physics. arizona. edu/~johns/l 1 muo-top. htm Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 22

L 1 Trigger Sub-System: L 1 Cal Daniel Edmunds 5 March 2008 10 -th L 1 Trigger Sub-System: L 1 Cal Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 23

L 1 Trigger Sub-System: L 1 Cal q Example of Trigger Term sent to L 1 Trigger Sub-System: L 1 Cal q Example of Trigger Term sent to the Trigger Framework v v CSWEM(2, 10. , 3. 2) : >= 2 Electron, >=10 Ge. V, |eta|<=3. 2 CSWEI(1, 16. , 3. 2) : >=1 Isolated EM, >=16 Ge. V, |eta|<=3. 2 CSWJT(1, 20. , 3. 2) : >=1 Jet, >=20 Ge. V, |eta|<=3. 2 CSWMET(24. ) : Missing Et >= 24 Ge. V q References: v http: //www. nevis. columbia. edu/~evans/l 1 cal/ Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 24

L 1 Trigger Sub-System: L 1 CTT Daniel Edmunds 5 March 2008 10 -th L 1 Trigger Sub-System: L 1 CTT Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 25

L 1 Trigger Sub-System: L 1 CTT q Tracking Trigger: v Send all axial L 1 Trigger Sub-System: L 1 CTT q Tracking Trigger: v Send all axial fibers (plus central and forward preshower) to gate arrays v Detect if a fiber combination is consistent with preset Pt thresholds v Also tags: Track, Isolated Track, Electron, … q Reference: v http: //www-d 0 online. fnal. gov/www/groups/cft/CTT/online/ctt_main. html Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 26

L 1 Trigger Sub-System: L 1 Cal-Track Daniel Edmunds 5 March 2008 10 -th L 1 Trigger Sub-System: L 1 Cal-Track Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 27

L 1 Trigger Sub-System: L 1 Cal-Track q. Reference: v http: //atlas. physics. arizona. L 1 Trigger Sub-System: L 1 Cal-Track q. Reference: v http: //atlas. physics. arizona. edu/~johns/l 1 muo /l 1 caltrack-top. htm Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 28

q Introduction v Fermilab v DZero v Triggering at D-Zero q q q q q Introduction v Fermilab v DZero v Triggering at D-Zero q q q q L 1 Trigger Sub-Systems Trigger Framework Serial Command Link Control of the TFW Monitoring of the TFW Online Luminosity Measurement Conclusion Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 29

D-Zero Level 1 Trigger q Modular Design v L 1 Trigger Subsystems do not D-Zero Level 1 Trigger q Modular Design v L 1 Trigger Subsystems do not directly cause triggers v Partitionable Triggering and Readout Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 30

Trigger Framework q Level 1 Functionalities of the TFW Daniel Edmunds 5 March 2008 Trigger Framework q Level 1 Functionalities of the TFW Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 31

Trigger Framework q A typical L 1 Trigger would include, e. g: v Some Trigger Framework q A typical L 1 Trigger would include, e. g: v Some L 1 Trigger Terms o Require L 1 CTT ‘TTK(1, 3. )‘ i. e. >= 1 Track >= 3 Ge. V o Require L 1 CAL ‘CSWEM(1, 4. , 3. 2)’ i. e. >= 1 Electron >= 4 Ge. V o Require L 1 MUO 'mu 1 ptxattx‘ ie. >=1 muon with tight scint requirement o Require 'live_accel_bx‘ v Some Technical Terms o Veto ‘skip_next_n_0‘ i. e. skip 8 crossings after each L 1 Accept o Veto 'caltc 00‘ i. e. stay away from Calorimeter pulser v A List of crates to be readout v A Prescale ratio Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 32

Trigger Framework q Forming Trigger Decisions Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL Trigger Framework q Forming Trigger Decisions Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 33

Trigger Framework q The DAQ System can Trigger Framework q The DAQ System can "throttle" itself Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 34

Trigger Framework q 256 Input Trigger Terms available v use ~175 for data taking Trigger Framework q 256 Input Trigger Terms available v use ~175 for data taking with beam q 128 Geographic Sections v use ~80 for data taking with beam q 128 Specific Triggers available v use ~120 for data taking with beam v Different types o o Daniel Edmunds 5 March 2008 Physics zero bias monitoring diagnostics 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 35

Trigger Framework q The Trigger Framework itself reads out v Pass information to L Trigger Framework q The Trigger Framework itself reads out v Pass information to L 3 system o e. g. Event Number v Includes all inputs, outputs, states o e. g. Mask of Specific Trigger Fired for this event v Includes information about adjacent BXs o e. g. state of L 1 Trigger Terms for previous and next crossings v Allow verification of TFW internal operation v Cross-reference with other subsystems Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 36

Trigger Framework Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR Trigger Framework Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 37

q Introduction v Fermilab v DZero v Triggering at D-Zero q q q q q Introduction v Fermilab v DZero v Triggering at D-Zero q q q q L 1 Trigger Sub-Systems Trigger Framework Serial Command Link Control of the TFW Monitoring of the TFW Online Luminosity Measurement Conclusion Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 38

SCL = Serial Control Link q Design idea: Common hardware path carrying all the SCL = Serial Control Link q Design idea: Common hardware path carrying all the information a Geographic Section needs to operate in the Run II Trigger/DAQ environment. q SCL Hub End is hosted in the Trigger Framework v Sends to each Geo. Sect: o Timing Information from DZero Master Clock o L 1/L 2 Trigger Decisions from Trigger Framework o Initialization requests v Receives from all Geo. Sect and concentrates: o L 1 and L 2 Busy signals o L 1 and L 2 Error signals o Initialization Acknowledgement Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 39

SCL : Hub End Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON SCL : Hub End Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 40

SCL : Receiver Mezzanine Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON SCL : Receiver Mezzanine Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 41

Serial Command Link q Connect to Geographic Sections of different types v Most readout, Serial Command Link q Connect to Geographic Sections of different types v Most readout, some used for synchronization v Some on platform, some in Counting House v Some used for Test Stands q References: v http: //www-ese. fnal. gov/d 0 trig v http: //www. pa. msu. edu/hep/d 0/l 1/scl. html Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 42

q Introduction v Fermilab v DZero v Triggering at D-Zero q q q q q Introduction v Fermilab v DZero v Triggering at D-Zero q q q q L 1 Trigger Sub-Systems Trigger Framework Serial Command Link Control of the TFW Monitoring of the TFW Online Luminosity Measurement Conclusion Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 43

Control of the TFW q COOR is the experiment coordinator program q Trigger Control Control of the TFW q COOR is the experiment coordinator program q Trigger Control Computer (L 1 TCC) hides the complexity of the hardware from rest of experiment. v COOR and L 1 TCC communicate at high level. v Pick the Interface at triggering resources; where cleanest Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 44

Control of the TFW q COOR makes requests and L 1 TCC complies v Control of the TFW q COOR makes requests and L 1 TCC complies v All messages are acknowledged o Success/Failure v COOR requests are incremental o i. e. not full context in every message q “Trigger Programming” in three phases v Configuration of FPGA Firmware (at power up) v Initialization (including before each store) o Check health status of all resources o Forget all history o Bring to defined default state for COOR control v Run-Time programming (for physics running or tests) o Managed by Trigger Board (for physics) o Controlled through COOR Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 45

Control of the TFW q Trigger Control Software v Object-oriented implementation with generic procedures Control of the TFW q Trigger Control Software v Object-oriented implementation with generic procedures used for: o COOR messages o Tests and diagnostics o Interactive expert commands (via GUI) v All communications & all actions are logged o with time stamps. v Check previous content of a register before changing its content, check again after o Not relying solely on VME IO cycle completion Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 46

q Introduction v Fermilab v DZero v Triggering at D-Zero q q q q q Introduction v Fermilab v DZero v Triggering at D-Zero q q q q L 1 Trigger Sub-Systems Trigger Framework Serial Command Link Control of the TFW Monitoring of the TFW Online Luminosity Measurement Conclusion Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 47

Monitoring of the TFW q Provides monitoring of Triggering & DAQ for the whole Monitoring of the TFW q Provides monitoring of Triggering & DAQ for the whole experiment q Monitor Trigger Resources q Diagnose sources of problems q Data may be displayed in different forms v Rates v Percentages v Counts v States Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 48

Monitoring of the TFW q Hardware assistance: v TFW hardware is built to simultaneously Monitoring of the TFW q Hardware assistance: v TFW hardware is built to simultaneously "capture" monitoring information in all parts of the TFW v L 1 TCC later reads out this snapshot over VME q Beam Crossing counter captured in snapshot provides accurate Time Base for scaler increments: v Can tell ~100. 0% apart from exactly 100% v And tell ~0. 0% from exactly never Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 49

Monitoring of the TFW q Get a fresh snapshot of monitoring information about once Monitoring of the TFW q Get a fresh snapshot of monitoring information about once every 5 seconds (including the precise Beam Crossing counter for time reference) v Get information from triggered BXs, when possible v Force the capture of fresh contemporary data when DAQ is stuck, to be able locate the source of the problem q L 1 TCC only captures monitoring information q L 1 TCC serves monitoring data to Monitoring Clients v v Calculate increments, rates, percentages Display, Graph, Log Automatically diagnose problems, take action Post on the web o http: //www. pa. msu. edu/hep/d 0/l 1/tcc/trigmon_snapshot_frame. html o http: //www-d 0 online. fnal. gov/www/groups/tm/daqrates/current_store. html Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 50

q Introduction v Fermilab v DZero v Triggering at D-Zero q q q q q Introduction v Fermilab v DZero v Triggering at D-Zero q q q q L 1 Trigger Sub-Systems Trigger Framework Serial Command Link Control of the TFW Monitoring of the TFW Online Luminosity Measurement Conclusion Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 51

Instrumenting & Monitoring Online Luminosity for each L 1 Trigger q. First: need a Instrumenting & Monitoring Online Luminosity for each L 1 Trigger q. First: need a Luminosity Monitor signal v cf. other DZero talk q. Now need to instrument this signal to be able to derive: v Delivered and Recorded Beam Luminosity v Instantaneous and Integrated Luminosity v Individual Luminosity that each L 1 Specific Trigger has been exposed to Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 52

How Luminosity is Measured for each L 1 Trigger q Luminosity Monitor must be How Luminosity is Measured for each L 1 Trigger q Luminosity Monitor must be instrumented separately for each bunch v Non linear math = compute each bunch separately, then sum v Non linear math = must maintain good time resolution q Luminosity Monitor must be instrumented separately for each Specific Trigger v Specific Triggers enabled (exposed) for different crossings q D-Zero could thus have v 128 x 159 = 20 k scalers q For comparison: Atlas could have v 256 x 3564 = 900 k scalers Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 53

How Luminosity is Measured for each L 1 Trigger q Reducing the number of How Luminosity is Measured for each L 1 Trigger q Reducing the number of luminosity scalers: v Differentiate Correlated vs Non-Correlated sources of disable o Some sources may not treat all crossing evenly o e. g. a larger bunch may cause more L 1 Accept, and dead-time can thus “shadow” following bunches v Form Exposure Groups for L 1 Specific Triggers with common sources of correlated disable o Geographic Section Disable (L 1 busy after Trigger Accept) o Some Global Disable (e. g. skip next crossing after L 1 Accept) o Some And-Or Exposure Restrictions (e. g. Live Crossing) v Individual Specific Trigger in each Exposure Group may still have independent sources of de-correlated disable o o Daniel Edmunds 5 March 2008 COOR Enable Prescaler (after careful implementation of a duty cycle prescaler) Level 2 Disable (not fixed delay from L 1 Accept) Level 3 Disable (no fixed delay) 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 54

How Luminosity is Measured for each L 1 Trigger q Fully instrument up to How Luminosity is Measured for each L 1 Trigger q Fully instrument up to 8 separate Exposure Groups v 8 x 159 = 1. 3 k scalers q Instrument the de-correlated contribution for each Specific Trigger v Applied as a correction to the Exposure Group the Specific Trigger belongs to q Luminosity information recorded at Luminosity Blocks boundaries with unique IDs v every minute, or when run conditions change q End up with individual measurements for the “Exposed Luminosity” of all 128 L 1 Spec Triggers Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 55

q Introduction v Fermilab v DZero v Triggering at D-Zero q q q q q Introduction v Fermilab v DZero v Triggering at D-Zero q q q q L 1 Trigger Sub-Systems Trigger Framework Serial Command Link Control of the TFW Monitoring of the TFW Online Luminosity Measurement Conclusion Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 56

Conclusion Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING Conclusion Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 57

Live Events Online www. fnal. gov/pub/now/live_events/dzero_live. html Daniel Edmunds 5 March 2008 10 -th Live Events Online www. fnal. gov/pub/now/live_events/dzero_live. html Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 58

Conclusion q A Single Top Candidate Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL Conclusion q A Single Top Candidate Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 59

Conclusion v Run. II hardware in operation since 2001 v First Run. II Collisions Conclusion v Run. II hardware in operation since 2001 v First Run. II Collisions in April 2001 v Expect to run through 2009 and maybe 2010 v Over 3 fb-1 of integrated luminosity recorded v Potential for 8 -9 fb-1 by end of 2010 Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 60

Thank you v Contact: edmunds@pa. msu. edu v http: //www. pa. msu. edu/hep/d 0/l Thank you v Contact: [email protected] msu. edu v http: //www. pa. msu. edu/hep/d 0/l 1/ Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 61

Extra slides… Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR Extra slides… Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 62

DØ Collaboration Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR DØ Collaboration Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 63

Introduction to D-Zero Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION Introduction to D-Zero Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 64

DØ Central Tracking System Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON DØ Central Tracking System Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 65

Triggering at D-Zero Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION Triggering at D-Zero Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 66

Triggering at D-Zero Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION Triggering at D-Zero Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 67

L 1 Trigger Sub-System: L 1 Cal Daniel Edmunds 5 March 2008 10 -th L 1 Trigger Sub-System: L 1 Cal Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 68

The TFW Internals itself Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON The TFW Internals itself Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 69

Triggering at D-Zero Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION Triggering at D-Zero Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 70

The TFW Internals itself Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON The TFW Internals itself Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 71

Triggering at D-Zero Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION Triggering at D-Zero Daniel Edmunds 5 March 2008 10 -th INTERNATIONAL CONFERENCE ON INSTRUMENTATION FOR COLLIDING BEAM PHYSICS 72