CODA at TUNL (C@T) is the data acquisition (DAQ) system for TUNL and HIGS. C@T is a local flavor of CEBAF Online Data Acquisition (CODA) system, tailored to fit the TUNL/HIGS needs. This manual describes the essentials of CODA, recipes for users and programmers to setup experiments and analyze data. In the present scheme of DAQ, the acquisition and analysis of data are separate entities. CODA is used to acquire the data, which could be analyzed online or replayed at a later time. An online resource using a ROOT based analysis program called TUNL Real-Time Analysis Package (TRAP) is under development. To facilitate the replay of the data, presently, a CERNLib based analysis software is being used. The current analyzer is NOT an online analysis program. In principle, it can analyze up to (n-1) events, where n is the number of events acquired by C@T. Typically, enough events are collected and then replayed, or all events after the end of a run are replayed. The analyzed events are immediately available for viewing, using Physics Analysis Workstation (PAW) and its Shared Memory Region (SMR), while the analyzer is still processing events.
The versions of C@T and TRAP will follow a scheme of being labeled by YY.a,b,c,..., where YY is the year and time sequence releases during an year will be indicated by the sequence of letters. In this scheme, the first version is 03.a. The CODA version which is being used is 2.2.1. For the PC based DAQs the OS is RedHat Linux version 7.2, and for the Sun machines it is Solaris 7.
This manual is also available online at http://www.tunl.duke.edu/
daq/