1. NA62 RICH Gas System V2.0 S. Haider PH/DT/DI LHC-Gas-Project

2. Overview  Requirements  Gas system design  Cost estimate 9/2/20112 NA62 RICH Gas system V2.0, S.Haider

3. Requirements  Detector is a vacuum vessel (assumption)  V = 200 m 3 100% Neon  Absolute pressure regulation 0 to 1010 mbara  Max pressure 1200 mbara  Accuracy of pressure regulation +/- 1 mbar  Fill flow rate 3 to 10 m3/h  Gas density variations < 1%  Residual gas concentration:  CO2 < 1000 ppm  O2 < 1000 ppm  H2O < 1000 ppm  N2 < 5000 ppm 9/2/20113 NA62 RICH Gas system V2.0, S.Haider

4. RICH gas system V2.0 9/2/2011 NA62 RICH Gas system V2.0, S.Haider 4

5. Gas injection 9/2/2011 NA62 RICH Gas system V2.0, S.Haider 5  Two mayor modes:  Filling:  Max injection flow ~10 m3/h ie 20 hours of filling time  Leak compensation:  Small flow gas injection 400 l/h ie 2 mbar/hour compensation capability

6. Vacuum pump 9/2/2011 NA62 RICH Gas system V2.0, S.Haider 6  Rotary vane pumps  have high pumping speeds (1 day of pumping)  Minimal pressure ~ 0.1 mbar  Not oil free

7. High pressure pumping system for Neon recovery 9/2/2011 NA62 RICH Gas system V2.0, S.Haider 7  Two pump in series:  First stage: membrane pump that is able to produce suitable vacuum and ~ 2bar at outlet  Second stage: high pressure pump with 80 bar capability (Haug)  200 m3 of Neon need 2.5m3 of high pressure vessel at 80bar  Cleanliness important: completely oil-free compressor.

8. Cost estimate (rough) Cost estimate Gas injection modulefr. 21,000 High speed vacuum pumpfr. 24,000 1 st stage recovery pumpfr. 15,000 2 nd stage recovery pumpfr. 43,000 Cleaning cartridgefr. 9,000 Racks, valves, piping in racksfr. 30,000 Recovery vessel (3 batteries)fr. 18,000 Electrical modulefr. 25,000 Manpower for racksfr. 30,000 Total version 2fr. 215,000 Installation work in NA62 not costed 9/2/20118 NA62 RICH Gas system V2.0, S.Haider Total version 1 : fr. 335.000 (no under pressure protection)