The GlueX Start Counter Detector

Abstract

The design, simulation, fabrication, calibration, and performance of the GlueX Start Counter detector is described. The Start Counter was designed to operate at integrated rates of up to 9 MHz with a timing resolution in the range of 500 to 825 ps (FWHM). The Start Counter provides excellent solid angle coverage, a high degree of segmentation for background rejection, and can be utilized in the level 1 trigger for the experiment. It consists of a cylindrical array of 30 thin scintillators with pointed ends that bend towards the beam line at the downstream end. Magnetic field insensitive silicon photomultiplier detectors were used as the light sensors.

Cited by in corpus (17)

• First measurement of near-threshold J/$\psi$ exclusive photoproduction off the proton
• The GlueX Beamline and Detector
• Measurement of the J/$\psi$ photoproduction cross section over the full near-threshold kinematic region
• Beam Asymmetry $\mathbf{\Sigma }$ for the Photoproduction of $\eta$ and ${\eta }^{\prime }$ Mesons at ${\mathbf{E}}_{\gamma }=8.8$GeV
• The Central Drift Chamber for GlueX
• Strange Hadron Spectroscopy with Secondary KL Beam in Hall D
• Measurement of Spin-Density Matrix Elements in $\rho (770)$ Production with a Linearly Polarized Photon Beam at $E_{\gamma }=8.2-8.8\text{GeV}$
• Search for photoproduction of axion-like particles at GlueX
• Search for axion-like particles through nuclear Primakoff production using the GlueX detector
• Measurement of beam asymmetry for ${\pi }^{-}{\Delta }^{++}$ photoproduction on the proton at $E_{\gamma }$=8.5 GeV
• Measurement of the Photon Beam Asymmetry in $\vec{\gamma }p\to K^{+}{\Sigma }^0$ at $E_{\gamma }=8.5$ GeV
• Upper Limit on the Photoproduction Cross Section of the Spin-Exotic ${\pi }_1(1600)$
• First Measurement of Near- and Sub-Threshold $J/\psi$ Photoproduction off Nuclei
• Spin-Density Matrix Elements for Vector Meson Photoproduction at GlueX
• Searches for Exotic Hadrons at GlueX
• Measurement of Spin-Density Matrix Elements in $\varphi (1020)\to K_S^0{K}_L^0$ Photoproduction with a Linearly Polarized Photon Beam at $E_{\gamma }=8.2-8.8$ GeV
• Beam Asymmetries ($\Sigma$) for ${\pi }^0$, $\eta$ and ${\eta }^{\prime }$ in Photoproduction at GlueX