HERA-B RICH photon detector
Status in 1996:
• TMAE and CsI have serious problems in long term
operation at very high rates
• Hamamatsu just came out with the metail foil
multianode PMTs of the R5900 series: first multianode
PMTs with very little cross-talk
• Tested on the bench and in the beam: excellent
performance àeasy decision
à NIM A394 (1997) 27