The CLAS12 forward time-of-flight system

Carman, D.S. et al. (2020) The CLAS12 forward time-of-flight system. Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 960, 163629. (doi: 10.1016/j.nima.2020.163629)

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Abstract

The Forward Time-of-Flight system for the large-acceptance CLAS12 spectrometer in Hall B at the Thomas Jefferson National Accelerator Facility is described. The system is positioned at distances in the range from 6.2 m to 7.2 m from the beam–target interaction point and spans laboratory polar angles from and nearly the full azimuth. The system consists of 540 individual scintillation counters with double-ended readout that range in length from 17 cm to 426 cm of discrete widths of 6 cm, 15 cm, and 22 cm, and of discrete thicknesses of 5 cm and 6 cm. The effective counter time resolution for passing charged particles varies from 50 ps for the shortest counters at small angles to 200 ps for the longest counters at large angles. The detectors are part of the forward-angle particle identification system for CLAS12 during offline event reconstruction and are a component of the online data acquisition trigger to select final state event topologies with forward-going charged particles. ∘ → 4 5 ∘ and nearly the full azimuth. The system consists of 540 individual scintillation counters with double-ended readout that range in length from 17 cm to 426 cm of discrete widths of 6 cm, 15 cm, and 22 cm, and of discrete thicknesses of 5 cm and 6 cm. The effective counter time resolution for passing charged particles varies from 50 ps for the shortest counters at small angles to 200 ps for the longest counters at large angles. The detectors are part of the forward-angle particle identification system for CLAS12 during offline event reconstruction and are a component of the online data acquisition trigger to select final state event topologies with forward-going charged particles.

Item Type:Articles
Additional Information:This material is based upon work supported by the U.S. Department of Energy, Office of Science, United States, Office of Nuclear Physics, United States under contract DE-AC05-06OR23177 and was also supported by the National Science Foundation, United States grant PHY-1205782.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Clark, Ms Louise
Authors: Carman, D.S., Clark, L., De Vita, R., Fedotov, G., Gothe, R.W., Hollis, G., Miller, B., Phelps, E., Tian, Y., Trivedi, A., and Wiggins, C.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment
Publisher:Elsevier
ISSN:0168-9002
ISSN (Online):1872-9576
Published Online:11 February 2020

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