Abstract
The Beam Instrumentation group at CERN has developed a new scintillating fibre beam monitor for the measurement of secondary particle beams in the CERN Experimental Areas. The monitor has a simple design that stands out for its low material budget, vacuum compatibility, good performance, low cost, and ease of production. By using different read-out techniques the monitor can perform several functions, such as measurement of the profile, position and intensity of the beam, momentum spectrometry, generation of fast trigger signals, and measurement of the time-of-flight for particle identification. The monitor has been successfully commissioned in the recently created test beams of the CERN Neutrino Platform, where it has shown an excellent performance as described in the paper.
Highlights
The Experimental Areas at CERN host a rich and diverse program of high-energy physics experiments and research and development in particle detectors and accelerator technology
The Beam Instrumentation group at CERN has been investigating a replacement for the ageing Multi-Wire Proportional Chambers (MWPC) and Delay Wire Chambers (DWC) that has led to identifying scintillating fibres (SciFi) as the best suited detection technique, as reported in [9,10,11]
It is based on the FMC-TDC [32], which is a Time-to-Digital Converter (TDC) board developed at CERN for timing applications using the White Rabbit technology
Summary
The Experimental Areas at CERN host a rich and diverse program of high-energy physics experiments and research and development in particle detectors and accelerator technology. The Beam Instrumentation group at CERN has been investigating a replacement for the ageing MWPC and DWC that has led to identifying scintillating fibres (SciFi) as the best suited detection technique, as reported in [9,10,11] It offers several advantages, such as a low material budget, good performance, easy scalability, and the low cost of scintillating fibres. In 1991, the FAROS Collaboration (RD-17) at CERN [17] started an extensive research and development program on new beam hodoscopes based on fine scintillating fibres read-out with PositionSensitive Photomultipliers (PSPM) This program led to some important beam hodoscopes, a good example of which is the SciFi hodoscope of the COMPASS Experiment (NA58) at CERN [18] in the early 2000’s. Photomultipliers in the Mu3e Experiment [23] and the LHCb SciFi tracker [24]
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