The K1.8BR spectrometer system at J-PARC
  A new spectrometer system was designed and constructed at the secondary beam line K1.8BR in the hadron hall of J-PARC to investigate $\bar K N$ interactions and $\bar K$-nuclear bound systems. The spectrometer consists of a high precision beam line spectrometer, a liquid $^3$He/$^4$He/D$_2$ target system, a Cylindrical Detector System that surrounds the target to detect the decay particles from the target region, and a neutron time-of-flight counter array located $\sim$15 m downstream from the target position. Details of the design, construction, and performance of the detector components are described. 
Keizo Agari, Shuhei Ajimura, George Beer, Hyoungchan Bhang, Mario   Bragadireanu, Paul Buehler, Luigi Busso, Michael Cargnel...
physics.ins-det nucl-ex