The HERA-B RICH counter

	Peter Križan
	University of Ljubljana and J. Stefan Institute

The HERA-B Experiment

The HERA-B Detector

HERA-B RICH

HERA-B RICH: rates on the photon detector

HERA-B RICH photon detector

CsI chamber

CsI chamber

TMAE chamber

TMAE chamber

HERA-B RICH photon detector

Multianode PMTs

Multianode PMTs

HERA-B RICH tiling scheme

Multianode PMTs

Multianode PMT read-out

Light collection system

Light collection system

Mechanics

Photon detector: Upper half

Photon detector form

Mirrors

Mirrors

Mirrors - alignment

HERA-B RICH performace

Performance

Performance

Performace

Summary

	R5900 MA PMTs have proven to be an extremly reliable and easy to use detector for Cherenkov photons.
	Several new methods were developed for the design of the detector surface, analysis of data and alignment of the optical system.
	The HERA-B RICH counter showed an excellent performance in very adverse conditions.