Trigger-DAQ and Slow Controls Systems in the Mu2e Experiment

TL;DR

This paper describes the development and integration of the Trigger-DAQ and Slow Controls Systems for the Mu2e experiment at Fermilab, focusing on software solutions that enable flexible, scalable, and web-based data acquisition and control.

Contribution

It presents the implementation and integration of otsdaq-based DAQ and EPICS-based DCS systems for Mu2e, highlighting their design, features, and deployment plans.

Findings

Successful development of a flexible, web-based DAQ system using otsdaq.

Integration of DCS with otsdaq for comprehensive system monitoring.

Prototype system built and planned deployment at Mu2e facility.

Abstract

The muon campus program at Fermilab includes the Mu2e experiment that will search for a charged-lepton flavor violating processes where a negative muon converts into an electron in the field of an aluminum nucleus, improving by four orders of magnitude the search sensitivity reached so far. Mu2e's Trigger and Data Acquisition System (TDAQ) uses otsdaq as its solution. Developed at Fermilab, otsdaq uses the artdaq DAQ framework and art analysis framework, under the-hood, for event transfer, filtering, and processing. otsdaq is an online DAQ software suite with a focus on flexibility and scalability, while providing a multi-user, web-based, interface accessible through the Chrome or Firefox web browser. The detector Read Out Controller (ROC), from the tracker and calorimeter, stream out zero-suppressed data continuously to the Data Transfer Controller (DTC). Data is then read over the PCIe bus to a software filter algorithm that selects events which are finally combined with the data flux that comes froma Cosmic Ray Ve to System (CRV). A Detector Control System (DCS) for monitoring, controlling, alarming, and archiving has been developed using the Experimental Physics and Industrial Control System (EPICS) Open Source Platform. The DCS System has also been itegrated into otsdaq. The installation of the TDAQ and the DCS systems in the Mu2e building is planned for 2021-2022, and a prototype has been built at Fermilab's Feynman Computing Center. We report here on the developments and achievements of the integration of Mu2e's DCS system into the online otsdaq software.