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NSCLDAQ is a software suite that provides a flexible and extensible framework for handling the data flow produced by nuclear physics experiments. It aims to solve the top-level problem of managing the data stream by breaking it down into smaller problems solved by smaller applications. It therefore is a collection of tools that can be assembled into more complicated applications. This approach enables NSCLDAQ to be a modular system capable of tackling a wide range of experimental setups, from small calibration setups to merging multiple independent data acquisitions into unified systems.
As you can imagine, NSCLDAQ is a large package with many utilities. Indeed a lot of time has been spent documenting its capabilities. For more details, please continue reading the user's guide of the NSCLDAQ 11.0 comprehensive documentation. That should get your feet wet.
SpecTcl is for analysis what NSCLDAQ is for dataflow. SpecTcl is a C++ framework that allows experimenters to write custom analysis software that seemlessly integrates with a histogramming engine and viewer. SpecTcl enables the quick creation of histograms from the data and the ability to create 1d and 2d gates and apply them to histograms on the fly.
The Digital Data Acquisition System (DDAS) is a lab-supported data acquisition system built around the XIA Pixie-16 Digitizer running the general-purpose firmware developed by XIA for the NSCL. The system is very flexible and is capable of reading out a wide range of detectors. The DDAS provides tools for configuring the the digitizers, reading them out, and analyzing the resulting data. All of this is built on top of NSCLDAQ frameworks and is therefore completely compatible with NSCLDAQ.