HALL A Trigger and Data Acquisition

The following resources are available.

• Guides for running DAQ
  • General guide   for data taking.
  • CODA guide   for 2 HRS.
  • HAPPEx DAQ Guide

• Info about management of work disks.
• 12 GeV Upgrade plan document in two formats:   postscript   and   PDF
• Instructions to download the trigger   and more   general info about trigger including circuit diagrams.
• Info about the helicity in G0 mode and measuring the charge asymmetry, among other things, using scalers.
• How to use the Hall Accounting Software   (shift summary).
• How to use the portservers to connect to VME boards or HV crates.
• Here are some FAQs about computer deadtime, plus to calculate deadtime M. Liang provides a Monte Carlo for Deadtime. The Year-2001 update on electronics deadtime in the trigger.
• The code to monitor the rastered spot size:   SPOT   (aka raster++).
• Hall A ROOT/C++ analyzer   and   ROOT in JLab CUE.
• A bunch of software tools for Hall A.   Don't re-invent the wheel !
• The main link for ESPACE.
• An overview of the Raw Data Structure including CODA data, EPICS data, scalers, etc.
• If you are developing a CODA system here are some Hints on Installing CODA with emphasis on Linux.
• C++   Examples   :
  • CODA classes to access CODA data via common interfaces to a CODA file or ET system.
  • An event decoder which is part of the ROOT/C++ analyzer.
  • The Scaler class package, which is part of the ROOT/C++ analyzer.
  • Simple example of looking at CODA files or ET data and filling root plots for   DVCS test stand   (untar, see README).
  • Complicated example of dataspy online GUI   dataspy++ for RCS   (untar, see README).
• Information about JLab computers and how to store or retrieve data from MSS can be learned from the computer center.
• Here is a link for learning how to do offline analysis using the JLab computer farm.
• CERN Library and other CERN Documentation from the CERN Documentation Server.
• Information about CODA, the DAQ toolkit developed by the Jefferson Lab DAQ group.
• A short Latex manual and the revtex4 home page.