Dr Jochen Schwiening (GSI)Dr Wenliang Li (College of William and Mary)
The GlueX experiment at Jefferson Laboratory aims to perform quantitative tests of non-perturbative QCD through hadronic spectroscopy (mainly using light-quark mesons and baryons). The recently installed Detection of Internally Reflected Cherenkov light (DIRC) detector is an important addition to the particle identification (PID) package of GlueX and is a crucial element for carrying out the full GlueX physics program. The DIRC is designed to provide clean pi/K separation up to 4 GeV/c momenta in the forward region (theta<11 deg from the beam). This capability will enable us to explore the s-sbar hybrid meson states which decay into final states with charged kaons. The DIRC system is constructed using long quartz radiators from decommissioned BaBar experiment combined with new compact photon sensors based on SuperB FDIRC concept. This system was fully installed in Oct 2019, and commissioned with beam during 4 weeks in Dec 2019. In this presentation we will be discussing the construction and commissioning of the DIRC system, as well as the performance of the detector compared to expectation.
Dr Wenliang Li (College of William and Mary)