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.

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

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

TFW Tutorial Outline (continued) The following web pages and references give more information about the D-Zero Run II Trigger Framework. – – – –Article title: The D0 Level 1 Trigger System Reference: NIMA48840 Journal title: Nuclear Inst. and Methods in Physics Research, A DOI information: /j.nima Available online at:

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) …