Just a fast guess of numbers:

Disc DIRC

The numbers are extracted from a calculation looking only at the optical region. The calculations include dispersion effects but no correction was applied yet. Thus we may expect to become better.

• angles: 5/10 - 22deg
  
• pion-kaon identification < 2 GeV/c
  
• kaon-proton < 4 GeV/c
  
• thickness 10-15mm + container =~ 20 X₀
  

Some preliminary simulation results obtained from Roland Schmidt in Giessen can be found at the home page of Bjoern Seitz , follow the link to Disc DIRC.

Forward RICH

Here we just assume the design as in the HERMES RICH. (see also NIM A553)

• angles: 0-5/10deg
  
• pions: 0.5 - 16 GeV/c
  
• kaons: 2 - 16 GeV/c
  
• protons: 2 - 20 GeV/c
  
• thickness 1.2m =~ 0.11 X₀
  

-- IntiLehmann - 30 Apr 2006