Abstract
This paper presents the Detector Control System (DCS) that has been designed and implemented for the NP04 experiment at CERN. NP04, also known as protoDUNE Single Phase (SP), aims at validating the engineering processes and detector performance of a large Liquid Argon (LAr) Time Projection Chamber (TPC) in view of the DUNE experiment. Built at the CERN Neutrino Platform (NP) facilities, it started to operate in September 2018 after two years of construction and commissioning, using a tertiary beam of the CERN SPS accelerator. After an overall description of the distributed control architecture that has been chosen for the control of this experiment, focus will be put on describing the software system design, based on the CERN control frameworks UNICOS and JCOP (built on top of WINCC OA). The knowledge acquired during the operation of the DCS is discussed and future work are presented.
Highlights
NP04 is the single-phase Time Projection Chamber (TPC) prototype for the DUNE Far Detector [1]
The detector elements, consisting of the TPC, which data is read using the cold electronics (CE) system, and the photon detection system (PDS), are housed in a cryostat filled with Liquid Argon (LAr) as target material
The TPC consists of two drift volumes, defined by a central cathode plane –called the Cathode Plane Assembly (CPA)– that is flanked by two anode planes and a field cage (FC) that surrounds the entire active volume
Summary
NP04 is the single-phase Time Projection Chamber (TPC) prototype for the DUNE Far Detector [1]. The detector elements, consisting of the TPC, which data is read using the cold electronics (CE) system, and the photon detection system (PDS), are housed in a cryostat filled with Liquid Argon (LAr) as target material. The TPC consists of two drift volumes, defined by a central cathode plane –called the Cathode Plane Assembly (CPA)– that is flanked by two anode planes and a field cage (FC) that surrounds the entire active volume. Each anode plane is constructed of three adjacent Anode Plane Assemblies (APAs) that are each 6 m high by 2.3 m wide in the installed position. The CE, mounted onto the APA frame, and immersed in LAr, amplifies and continuously digitizes the induced signals on the sense wires at 2 MHz, and transmits these waveforms to the Data Acquisition (DAQ) system. The experience acquired during its development and commissioning is given
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