Trigger Framework Tutorial

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Trigger Framework Tutorial

• Dan Edmunds
• Michigan State University
• 14-Apr-2009

The purpose of this talk is to present the
general features of the Trigger Framework and
its associated components in a tutorial
presentation. This is done by showing the
functions of the Trigger Framework from the
viewpoint of a number of different systems.
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TFW Tutorial Outline

• DAQ Context and Beam Structure in Run II
• Current Run II Beam Structure and Slang Terms
• DAQ System Buffering
• Scope of the System, Physical Location, Hardware
  Implementation
• Location in MCH
• Basic Cards in the Trigger Framework
• Level 1 Functions of the Trigger Framework
• Location of the Trigger Framework in making the
  Level 1 Trigger Decision
• Simplified block diagram of the Trigger Framework
  L1 Decision logic
• Level 2 Functions of the Trigger Framework
• Information to and from the L2 Global Stage
• Simplified view of issuing the L2 Trigger
  Decisions
• Routing Master Function of the Trigger Framework
• Trigger Framework Information to the Routing
  Master

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TFW Tutorial Outline (continued)

• Readout to Level 3 Function of the Trigger
  Framework
• Trigger Framework Readout to a standard VRB crate
• Block Diagram of a standard VRB crate.
• Trigger Control Computer Connections to the
  Trigger Framework
• Block Diagram of the Trigger Control Computer
  Connections to the Trigger Framework
• Function of and data carried on these connections
• Example of Commands from COOR
• Scalers and Monitoring Functions of the Trigger
  Framework
• Sources of Monitoring Information
• Trigger Monitoring and Luminosity Monitoring
• Trigger Operation Monitoring vs Physics Analysis
  Monitoring
• Content of the Monitoring Information
• Initialize and Cold Start of the Trigger
  Framework
• What happens at Trigger Framework Initialize
• Cold Start of the Trigger Framework and
  associated hardware

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TFW Tutorial Outline (continued)

• The following web pages and references give more
  information about the D-Zero Run II Trigger
  Framework.
• http//www.pa.msu.edu/hep/d0/l1/framework/tfw_tuto
  rial_march_2003.html
• http//www.pa.msu.edu/hep/d0/l1/framework/tfw_tuto
  rial_april_2009.ppt
• http//www.pa.msu.edu/hep/d0/l1/framework/tfw_tuto
  rial_april_2009.pdf
• Article title The D0 Level 1 Trigger System
• Reference NIMA48840
• Journal title Nuclear Inst. and Methods in
  Physics Research, A
• DOI information 10.1016/j.nima.2008.08.036
• Available online at
• http//dx.doi.org/10.1016/j.nima.2008.
  08.036

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Buffering in the DAQ system
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L1 Trig Framework Principal Functions
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TFW and TFW TCC
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Location of the TFW racks in MCH-1
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TFW racks in MCH-1
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a card from the TFW
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One L1 Trigger Decision Logic
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Geographic Sections
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SCL Hub End
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TFW TCC Connections (TRICS)
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Power Up Instructions on the Web
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Power Up Instructions (cont)