Construction and Performance of the Barrel Electromagnetic Calorimeter for the GlueX Experiment

NIM A896 (2018) 24-42 The barrel calorimeter is part of the new spectrometer installed in Hall D at Jefferson Lab for the GlueX experiment. The calorimeter was installed in 2013, commissioned in 2014 and has been operating routinely since early 2015. The detector configuration, associated Monte Carl...

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Bibliographic Details
Main Authors:	Beattie, Tegan, Foda, Ahmed, Henschel, Colleen, Katsaganis, S, Krueger, Shaun, Lolos, George, Papandreou, Zisis, Plummer, E. L, Semenova, Irina, Semenov, Andrei, Barbosa, Fernando, Chudakov, Eugene, Dalton, Mark, Lawrence, David, Qiang, Yi, Sandoval, Nicholas, Smith, Elton, Stanislav, Christopher, Stevens, Justin, Taylor, Simon, Whitlatch, Timothy, Zihlmann, Benedikt, Levine, William, McGinley, William, Meyer, Curtis, Staib, Michael, Anassontzis, Efstratios, Kourkoumelis, Christina, Vasileiadis, Georgios, Voulgaris, George, Brooks, William, Hakobyan, Hayk, Kuleshov, Sergey, Rojas, R, Vieyra, Christian Romero, Sandoval, Orlando Soto, Salas, Alam Toro, Vergara, Juan Vega, Shepherd, Matthew
Format:	Journal Article
Language:	English
Published:	20-04-2018
Subjects:	Physics - Instrumentation and Detectors Physics - Nuclear Experiment
Online Access:	Get full text
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Summary:	NIM A896 (2018) 24-42 The barrel calorimeter is part of the new spectrometer installed in Hall D at Jefferson Lab for the GlueX experiment. The calorimeter was installed in 2013, commissioned in 2014 and has been operating routinely since early 2015. The detector configuration, associated Monte Carlo simulations, calibration and operational performance are described herein. The calorimeter records the time and energy deposited by charged and neutral particles created by a multi-GeV photon beam. It is constructed as a lead and scintillating-fiber calorimeter and read out with 3840 large-area silicon photomultiplier arrays. Particles impinge on the detector over a wide range of angles, from normal incidence at 90 degrees down to 11.5 degrees, which defines a geometry that is fairly unique among calorimeters. The response of the calorimeter has been measured during a running experiment and performs as expected for electromagnetic showers below 2.5 GeV. We characterize the performance of the BCAL using the energy resolution integrated over typical angular distributions for $\pi^0$ and $\eta$ production of $\sigma_E/E$=5.2\%/$\sqrt{E(\rm{GeV})} \oplus$ 3.6\% and a timing resolution of $\sigma$\,=\,150\,ps at 1\,GeV.
Bibliography:	JLAB-PHY-18-2624
DOI:	10.48550/arxiv.1801.03088