The heavy photon search beamline and its performance

Baltzell, N. et al. (2017) The heavy photon search beamline and its performance. Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 859, pp. 69-75. (doi:10.1016/j.nima.2017.03.061)

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Abstract

The Heavy Photon Search (HPS) is an experiment to search for a hidden sector photon, aka a heavy photon or dark photon, in fixed target electroproduction at the Thomas Jefferson National Accelerator Facility (JLab). The HPS experiment searches for the e+e− decay of the heavy photon with bump hunt and detached vertex strategies using a compact, large acceptance forward spectrometer, consisting of a silicon microstrip detector (SVT) for tracking and vertexing, and a PbWO4 electromagnetic calorimeter for energy measurement and fast triggering. To achieve large acceptance and good vertexing resolution, the first layer of silicon detectors is placed just 10 cm downstream of the target with the sensor edges only 500 μm above and below the beam. Placing the SVT in such close proximity to the beam puts stringent requirements on the beam profile and beam position stability. As part of an approved engineering run, HPS took data in 2015 and 2016 at 1.05 GeV and 2.3 GeV beam energies, respectively. This paper describes the beam line and its performance during that data taking.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:McKinnon, Dr Bryan
Authors: Baltzell, N., Egiyan, H., Ehrhart, M., Field, C., Freyberger, A., Girod, F.-X., Holtrop, M., Jaros, J., Kalicy, G., Maruyama, T., McKinnon, B., Moffeit, K., Nelson, T., Odian, A., Oriunno, M., Paremuzyan, R., Stepanyan, S., Tiefenback, M., Uemura, S., Ungaro, M., and Vance, H.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment
Publisher:Elsevier BV
ISSN:0168-9002
ISSN (Online):1872-9576
Published Online:04 April 2017
First Published:First published in Nuclear Instruments and Methods in Physics Research A 859:69-75
Publisher Policy:Reproduced under a Creative Commons License

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