[Halld-pid-upgrade] [EXTERNAL] DIRC TIPP abstract

[Roman Dzhygadlo]

Dear colleagues,

below is an abstract for the TIPP conference. (It is the same we used 
for the Deutsche Physikalische Gesellschaft meeting which got canceled). 
Please let me know if you have any additional comments/suggestions 
(preferably before Feb 7).

best regards,
Roman

Performance of the GlueX DIRC during commissioning.

The GlueX experiment at Jefferson Laboratory aims to perform
quantitative tests of non-perturbative QCD by studying the spectrum
of light-quark mesons and baryons.
A Detector of Internally Reflected Cherenkov light (DIRC) was recently
installed to enhance the particle identification (PID) capability of
the GlueX experiment by providing clean π/K separation up to 3.7 GeV/c
momentum in the forward region (θ<11 deg), which will allow the study
of hybrid mesons decaying into kaon final states with significantly
higher efficiency and purity.
The new PID system is build using radiators from the decommissioned
BaBar DIRC counter, combined with new compact photon cameras based on
the SuperB FDIRC concept.
The full system was successfully installed and commissioned with beam 
during 2019/2020.
We will discuss the status of the DIRC detector and its performance 
during commissioning.