Start Counter

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Fig. 1: The GlueX Start Counter mounted to the liquid H2 target assembly[1].
Fig. 2: Start Counter readout electronics diagram [1].


The Start Counter (SC) surrounds the liquid hydrogen target. The primary purpose of the SC is to identify the photon beam buckets associated with the individual events. For an in-depth discussion of the Start Counter design, construction, and calibration see Eric Pooser's dissertation[2]. For a more concise presentation see the NIMA article [1]. How the SC fits into the full GlueX detector is described in a separate paper [3].


Resources (some historical or obsolete)


  1. 1.0 1.1 1.2 E. Pooser et al., The GlueX Start Counter Detector, Nucl. Instrum. Meth. A 927, 330-342 (2019) doi:10.1016/j.nima.2019.02.029 [arXiv:1901.02759 [physics.ins-det]].
  2. Pooser, Eric J., "The GlueX Start Counter & Beam Asymmetry \Sigma in Single \pi ^{{0}} Photoproduction" (2016). FIU Electronic Theses and Dissertations. 2450.
  3. S. Adhikari et al. [GlueX], The GLUEX beamline and detector, Nucl. Instrum. Meth. A 987, 164807 (2021) doi:10.1016/j.nima.2020.164807 [arXiv:2005.14272 [physics.ins-det]].