Commissioning of the Pair Spectrometer of the GlueX experiment

Somov, A.; Tolstukhin, I.; Somov, S.; Бердников, В. В.

doi:10.1088/1742-6596/798/1/012175

Cited by 5 publications

(6 citation statements)

References 3 publications

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“…On-beam tests were performed with two setups of increasing complexity. In the first experiment, a 3 × 3 PbWO 4 matrix was placed downstream of a secondary electron/positron beam generated by the primary photon beam in Hall-D. Leptons were identified and their energy measured by a Pair Spectrometer tagger (PS) [7,8]. This enabled a precise determination of the energy and a quantitative comparison between SRO and triggered clustering algorithms.…”

Section: Detector Setupmentioning

confidence: 99%

Streaming readout for next generation electron scattering experiment

Ameli¹,

Battaglieri²,

Berdnikov³

et al. 2022

Preprint

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Current and future experiments at the high intensity frontier are expected to produce an enormous amount of data that needs to be collected and stored for offline analysis. Thanks to the continuous progress in computing and networking technology, it is now possible to replace the standard 'triggered' data acquisition systems with a new, simplified and outperforming scheme. 'Streaming readout' (SRO) DAQ aims to replace the hardware-based trigger with a much more powerful and flexible software-based one, that considers the whole detector information for efficient real-time data tagging and selection. Considering the crucial role of DAQ in an experiment, validation with on-field tests is required to demonstrate SRO performance. In this paper we report results of the on-beam validation of the Jefferson Lab SRO framework. We exposed different detectors (PbWO-based electromagnetic calorimeters and a plastic scintillator hodoscope) to the Hall-D electronpositron secondary beam and to the Hall-B production electron beam, with increasingly complex experimental conditions. By comparing the data collected with the SRO system against the traditional DAQ, we demonstrate that the SRO performs as expected. Furthermore, we provide evidence of its superiority in implementing sophisticated AI-supported algorithms for real-time data analysis and reconstruction.

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Section: Detector Setupmentioning

confidence: 99%

Streaming readout for next generation electron scattering experiment

Ameli¹,

Battaglieri²,

Berdnikov³

et al. 2022

Preprint

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“…The typical rate of PS double-arm coincidences is a few kHz. Details about the performance of the spectrometer are given in [27,28].…”

Section: Pair Spectrometermentioning

confidence: 99%

“…The solenoid employs a cryostatically stable design with cryostats designed to be opened and serviced with hand tools. The magnet was refurbished and modified 27 for the GlueX experiment [35,36].…”

Section: Overviewmentioning

confidence: 99%

The GlueX beamline and detector

Adhikari

Akondi

Ghoul

et al. 2021

Nuclear Instruments and Methods in Physics Research Section A:

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The GlueX experiment at Je↵erson 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 µs. 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.

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“…The power supply 27 provides up to 10 V DC for establishing the operating current while ramping. The supply also includes a protection circuit, which can be engaged by a quench detector as well as by other signals.…”

Section: Conductor and Coilsmentioning

confidence: 99%

The GlueX Beamline and Detector

Adhikari,

Akondi,

Ghoul

et al. 2020

Preprint

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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 µs. 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. Contents

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Commissioning of the Pair Spectrometer of the GlueX experiment

Cited by 5 publications

References 3 publications

Streaming readout for next generation electron scattering experiment

Streaming readout for next generation electron scattering experiment

The GlueX beamline and detector

The GlueX Beamline and Detector

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