A time-of-flight system for the external target facility

TL;DR

This paper presents a time-of-flight system designed for the external target facility, capable of operating under ultrahigh vacuum, high counting rates, and magnetic fields, achieving 580 ps resolution and identifying nuclei up to mass 80.

Contribution

The paper introduces a novel time-of-flight system with specific performance capabilities suitable for challenging experimental environments.

Findings

Achieved a total time resolution of 580 ps FWHM.

Successfully identified nuclei with mass up to 80.

Operates effectively in ultrahigh vacuum and magnetic fields.

Abstract

A time-of-flight system with a plastic scintillator coupled to photomultipliers is developed for the external target facility (ETF). This system can satisfy the requirement of an ultrahigh vacuum ($\sim 10^{-9}$ mbar), a high counting rate ($\sim 10^{6}$ particles per second) and a magnetic field environment. In the beam test experiment, a total time resolution of 580 ps FWHM was obtained for the whole system, and nuclei with a mass of up to 80 could be identified using this system.