Experimental study of a proximity focusing Cherenkov counter prototype   for the AMS experiment
  A study prototype of Proximity Focussing Ring Imaging Cherenkov counter has been built and tested with several radiators using separately cosmic-ray particles and 12C beam fragmentation products at several energies. Counter prototype and experimental setup are described, and the results of measurements reported and compared with simulation results.The performances are discussed in the perspective of the final counter design. 
T. Thuillier, F. Malek, G. Boudoul, J. Ballon, A. Barrau, J. Berger,   M. Buenerd, L. Gallin-Martel, A. Menchaca-Rocha, and ...