R. Gernhauser et al., PHOTON DETECTOR PERFORMANCE AND RADIATOR SCINTILLATION IN THE HADES RICH, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 371(1-2), 1996, pp. 300-304
We report the performance of a VUV-sensitive MWPC with a pad cathode c
overed by a solid CsI photon converter. Cherenkov photons produced by
relativistic C-12 ions in a MgF2 radiator have been detected with 95%
single photo electron efficiency. In the HADES design a resulting figu
re of merit N-0 > 66 promises proper operation of the RICH as a fast h
adron blind trigger device. Tn addition, we have investigated the scin
tillation properties of several fluoro-carbon radiator gases in the VU
V wavelength region. A significant emission around lambda similar to 1
70 nm is found for CF4.