Maximum Integrated Data Acquisition System: Difference between revisions

Revision as of 00:16, 2 March 2021

Revision as of 10:48, 19 September 2021

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MIDAS (Maximum Integration Data Acquisition System) has been developed as a general purpose data acquisition system for small and medium scale experiments originally by Stefan Ritt in 1993, followed by Pierre-André Amaudruz in 1996. It is written in [[C (programming language)|C]] and published under the [[GPL]].

The experiment complexity ranges from test systems, where a single PC is connected to CAMAC via a PC-CAMAC interface, to experiments with several front-end computers and analysis nodes. The system currently runs under [[Linux]], [[MSMicrosoft Windows]], various versions of UNIX, [[OpenVMS|VMS]], [[VxWorks]] and [[MS-DOS]] and can be ported easily to virtually any operating system which supports [[Internet socket|TCP/IP sockets]].

A speed-optimized RPC layer is used for data exchange, with which sustained data rates of 980 kB/s ([[10BASE-T]]), 8.7 MB/s ([[100BASE-TX]]) and up to 98 MB/s ([[1000BASE-T]]). An integrated slow control system contains a fast online database and a history system. Drivers exist for CAMAC, VME, Fastbus, High Voltage Crates, GBIB and several PC plug-in DAQ boards. A framework is supplied which can be extended by user code for front-end readout on one side and data analysis on the other side. The online data can be presented by [[Physics Analysis Workstation|PAW]] as histograms and N-tuples as well as by [[ROOT]]. A dedicated HTTP server gives fast Web access for experiment control and to access the slow control system including a graphical representation of variable trends (history display).