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NA62 CEDAR Gas System (V0.2)

NA62 CEDAR Gas System (V0.2). F.Merlet , S.Haider. Overview . Requirements of the gas system Layout Flammability issues Installation. Requirements. 1.1m3 gas volume Pressurized detector vessel, 2.5 to 5.0 bara Operational gas H2 Purge gas N2 Fill-mode:

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NA62 CEDAR Gas System (V0.2)

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  1. NA62 CEDARGas System (V0.2) F.Merlet, S.Haider

  2. Overview Requirements of the gas system Layout Flammability issues Installation CEDAR Gas System, F.Merlet, S.Haider

  3. Requirements • 1.1m3 gas volume • Pressurized detector vessel, 2.5 to 5.0 bara • Operational gas H2 • Purge gas N2 • Fill-mode: • Evacuate chamber to ~1mbara • Fill with H2 until operational pressure is reached • Run-mode: • Maintain operational pressure within ~ 1mbar • Pressure-Scan-mode: • The chamber pressure can be varied in n-steps from P_min to P_max. Each pressure level is maintained constant for m-minutes • All parameters fully available to the detector expert. CEDAR Gas System, F.Merlet, S.Haider

  4. Gas system layout (V0.2) 1 2 1 2 CEDAR Gas System, F.Merlet, S.Haider

  5. Pressure drop considerations Pressure drop for 100m pipe and 500l/h Pressure drop for 100m pipe and 1000l/h CEDAR Gas System, F.Merlet, S.Haider

  6. Flammability issues 1.1 m3 @ 5 bara = 5.5m3 of gas in the detector 0.09 kg/m3  0.495 kg of flammable gas All needed components in contact with H2 must be ATEX (pump, MassFlowControllers, pressure sensors, readout electronics etc. ) All equipment is available The flammable gas detection is independent of the gas system and is usually installed by SC CEDAR Gas System, F.Merlet, S.Haider

  7. Installation Surface Gas room Outside Gas storage Gas rack VENT Gas Pipes and Electrical lines Underground area CEDAR VENT Gas rack CEDAR Gas System, F.Merlet, S.Haider

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