COMPASS

Gases

for the COMPASS detectors

(Run 2000)

Please send corrections.

Gases for COMPASS Detectors (25.02.2000)
detector modules Gases mixture volume typ. flow max. flow comments
% l l/h l/h
MicroMegas 3 Ne/C2H6/CF4 80/10/10 ?12 ?
DC Saclay 2Ar/C2H6 90/10 ?40 ? base line
Ar/C4H10/CF4 70/20/10 ?? ? optional
MWPC 7A, 6B Ar/CF4/CO2 74/20/ 6 ?? ? closed circuit
GEMs 20 Ar/CO2 70/30 7 30 100
Straws 6 Ar/CF4/CO2 74/20/ 6 ?? ? closed circuit
MW1 2Ar/CO2 70/30 ?? ? base line
Ar/C2H6 70/30 ?? ? optional
MW2 2Ar/CH4 75/25 1800300 1000
RICH1 ch 8CH4 100 40 80 800 closed circuit
CH4/iC4H10 >80/<20 40 80 800 optional
RICH1 rad C4F10 100 100000 10000 closed circuit

This page was last updated on March 8, 2000 by Gerhard Mallot