Trigger Framework TutorialDan Edmunds

Michigan State University

14-Apr-2009

The purpose of this talk is to present the 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.

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• 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

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– 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

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_tutorial_march_2003.html

– http://www.pa.msu.edu/hep/d0/l1/framework/tfw_tutorial_april_2009.ppt

– http://www.pa.msu.edu/hep/d0/l1/framework/tfw_tutorial_april_2009.pdf– http://www.pa.msu.edu/hep/d0/l1/framework/tfw_tutorial_april_2009.pdf

– Article title: The D0 Level 1 Trigger SystemReference: NIMA48840

Journal title: Nuclear Inst. and Methods in Physics Research, A

DOI information: 10.1016/j.nima.2008.08.036Available online at:

http://dx.doi.org/10.1016/j.nima.2008.08.036

Buffering in the DAQ system

L1 Trig Framework Principal Functions

TFW and TFW TCC

Location of the TFW racks in MCH-1

TFW racks in

MCH-1

a card from the TFW

One L1 Trigger Decision Logic

Geographic Sections

SCL Hub End

TFW TCC Connections (TRICS)

Power Up Instructions on the Web

Power Up Instructions (cont)

…