The GlueX Beamline and Detector

Abstract

The GlueX experiment at Jefferson Lab has been designed to study photoproduction reactions with a 9-GeV linearly polarized photon beam. The energy and arrival time of beam photons are tagged using a scintillator hodoscope and a scintillating fiber array. The photon flux is determined using a pair spectrometer, while the linear polarization of the photon beam is determined using a polarimeter based on triplet photoproduction. Charged-particle tracks from interactions in the central target are analyzed in a solenoidal field using a central straw-tube drift chamber and six packages of planar chambers with cathode strips and drift wires. Electromagnetic showers are reconstructed in a cylindrical scintillating fiber calorimeter inside the magnet and a lead-glass array downstream. Charged particle identification is achieved by measuring energy loss in the wire chambers and using the flight time of particles between the target and detectors outside the magnet. The signals from all detectors are recorded with flash ADCs and/or pipeline TDCs into memories allowing trigger decisions with a latency of 3.3 $\mu$s. The detector operates routinely at trigger rates of 40 kHz and data rates of 600 megabytes per second. We describe the photon beam, the GlueX detector components, electronics, data-acquisition and monitoring systems, and the performance of the experiment during the first three years of operation.

arXiv commentAccepted by Nuclear Instruments and Methods A, 78 pages, 54 figures

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• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• The BABAR Detector
• Hybrid Mesons
• First measurement of near-threshold J/$\psi$ exclusive photoproduction off the proton
• The Experimental Status of Glueballs
• Radiation Hardness Tests of SiPMs for the JLab Hall D Barrel Calorimeter
• The Status of Exotic-quantum-number Mesons
• Measurement of the beam asymmetry $\Sigma$ for ${\pi }^0$ and $\eta$ photoproduction on the proton at $E_{\gamma }=9$ GeV
• Implementation of the Dead-Time Free F1 TDC in the COMPASS Detector Readout
• Construction and Performance of the Barrel Electromagnetic Calorimeter for the GlueX Experiment
• The GlueX Start Counter Detector
• The Stonehenge Technique. A new method for aligning coherent bremsstrahlung radiators
• Beam Asymmetry $\mathbf{\Sigma }$ for the Photoproduction of $\eta$ and ${\eta }^{\prime }$ Mesons at ${\mathbf{E}}_{\gamma }=8.8$GeV
• Design and construction of a high-energy photon polarimeter
• The GlueX Central Drift Chamber: Design and Performance
• A measurement of the energy and timing resolution of GlueX Forward Calorimeter using an electron beam
• The Central Drift Chamber for GlueX
• Precision timing measurement of phototube pulses using a flash analog-to-digital converter
• Radiation Damage of F8 Lead Glass with 20 MeV Electrons

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• Search for axion-like particles through nuclear Primakoff production using the GlueX detector
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• Observing short-range correlations in nuclei through ${\rho }^0$ photo-production
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• The Constituent Counting Rule and Omega Photoproduction
• Measurement of the high-energy contribution to the Gerasimov-Drell-Hearn sum rule
• Ambiguities in the Partial-Wave Analysis of the Photoproduction of Pairs of Pseudoscalar Mesons
• 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
• SU(3) Gauge Symmetry: An Experimental Review of Diffractive Physics in e+p, p+p, p+A, and A+A Collision Systems
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