# Difference: ForwardCherenkov (1 vs. 4)

Revision 4
26 May 2006 - Main.GeorgSchepers
Line: 1 to 1

Just a fast guess of numbers:
Line: 12 to 12

• 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)

Line: 25 to 29

-- IntiLehmann - 30 Apr 2006
>
>
 META TOPICMOVED by="GeorgSchepers" date="1148656146" from="Pandatagpid.EndcapCherenkov" to="Pandatagpid.ForwardCherenkov"
Revision 3
30 Apr 2006 - Main.IntiLehmann
Line: 1 to 1

Just a fast guess of numbers:
Line: 10 to 10

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

## Forward RICH

Here we just assume the design as in the HERMES RICH. (see also
Line: 20 to 20

• pions: 0.5 - 16 GeV/c
• kaons: 2 - 16 GeV/c
• protons: 2 - 20 GeV/c
Changed:
<
<
• thickness 1.2m
>
>
• thickness 1.2m =~ 0.11 X0

Changed:
<
<
-- IntiLehmann - 26 Apr 2006
>
>
-- IntiLehmann - 30 Apr 2006

Revision 2
26 Apr 2006 - Main.IntiLehmann
Line: 1 to 1

Changed:
<
<
Just a quick posting of the VRVS-meeting numbers
>
>
Just a fast guess of numbers:

Deleted:
<
<
Disc DIRC:
angles: 5/10 - 22deg
(calculations without dispersion and only looking at the optical region)
pion-kaon identification < 2 GeV/c
kaon-proton < 4 GeV/c
thickness 10-15mm + container =~ 20 X

Forward RICH:
angles: 0-5/10deg
(assuming design as in HERMES)
pions: 0.5 - 16 GeV/c
kaons: 2 - 16 GeV/c
protons: 2 - 20 GeV/c
thickness 1.2m

Changed:
<
<
-- KlausFoehl - 26 Apr 2006
>
>

## 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 X

## 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

-- IntiLehmann - 26 Apr 2006

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