DCH DataFlow

Last modified: 12 February 2004 by Michael Kelsey

Background information

Your first step should be to visit the Online DataFlow page. There are many documents there which you will find useful. As a starting point an introduction to DataFlow, you should read the Programmer's Guide.

Some of the aspects of DataFlow code which are relavent to other aspects of the online world, are:

• Feature Extraction. This PostScript document outlines the conversion of raw data from the front-end into quantities suitable for use by reconstruction.
• Output tagged containers . These are the objects which transport the feature-extracted data from the ROM to the unix farm. As such, they are the starting point from which OEP and the L3 trigger will work.
• Detector addressing scheme. This defines the channel addresses for storing and using calibration constants, and also the information needed to extract wire/layer numbers in OEP and L3.

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For comments/questions about anything in the above, contact kelsey@slac.stanford.edu