The RICH system has the task of identifying charged particles over the momentum range 1 - 150 GeV/c, within an
angular acceptance of 10 - 330 mrad. Particle identification is crucial to reduce background in selected final states and
to provide an efficient kaon tag. To achieve this goal, the system consists of an upstream detector (RICH 1) with both a
silica aerogel and a C4F10 gas radiator, and a downstream detector (RICH 2) with a CF4 gas radiator.

RICH gas system - TDR support document:

Word, PS, PDF

Proposed gas system for the CF4 radiator (ps) , which will be very similar to C4F10 to radiator (ps):

19/07/2000