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Overview of Advanced Gas Systems: RICH, STRAW Tracker, and CEDAR

This document presents a preliminary overview of three advanced gas systems: the RICH Gas System, the STRAW Tracker Gas System, and the CEDAR Gas System. It details the system requirements, including the detector volume, gas composition, operating pressure, and stability options. Each system serves distinct functions, with varying gas types such as Neon, CO2, iC4H10, CF4, and H2. Considerations include gas filling costs, flow rates, and potential configurations for single-pass or closed-loop operational modes.

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Overview of Advanced Gas Systems: RICH, STRAW Tracker, and CEDAR

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  1. First look at Gas Systems (preliminary)

  2. Content • RICH Gas System • STRAW Tracker Gas System • CEDAR

  3. RICH Gas System Assumed Requirements • Detector Volume: ~200m3 • Gas: 100% Neon (CO2, Air <1%. H2O < 1000 ppm) • Cost of one Fill ~ 27 kCHF • Operating Pressure: 1000 mbar (at constant density) • Max. over/under pressure (rel. to Atmosphere) +100 mbar and – 0 mbar (no vacuum pumping possible) • Operating Stability (2 options): • Closed gas volume (no gas replacement) • Regulate constant density [Pset = ro/MNe*R*(273.2+T)]

  4. A: during operation replenishing • of gas only (no recirculation) • B: during operation gas circulation • and O2 and H2O filtering RICH Gas System

  5. Straw Tracker Gas System Assumed Requirements • Detector Volume: 1.2 m3 • 4 Stations with 1’792 Straws/Station • Gas: CO2 / iC4H10 / CF4 (CF4 ≤10% and iC4H10 ~5%, mix non-flammable ) • Gas Flow: 0.16 cm3/min per Straw (68.8 l/h for full detector = 1 gas volume change in 16 hours) ( expected gas leak is ~1% of inlet flow) • Operating Pressure: ( 2 options) • Patm + 2 mbar • 1000 mbar absolute • Operating Mode (2 possibilities): • Single pass system (baseline) • Closed loop gas system ( to be considered only if gas flows increase)

  6. STRAW Tracker Distribution System • 1 Rack per station • Each Rack has 8 gas channels equipped with remote shut-off valves and • in/out flow metering (1 channel supplies 1 half view) • Each Channel supplies 14 sub-channels equipped with manual valves Pressure regulation

  7. STRAW Tracker Full System single pass system Mixing zone will be a flammable gas zone

  8. CEDAR Gas System Assumed Requirements • Detector Volume: ~1.1 m3 • Gas: 100% H2 (flammable gas) • Operating Pressure: 3.5 bara • Operating Stability (2 options): • Closed gas volume (no gas replacement) • Regulate constant Density [Pset = ro/MNe*R*(273.2+T)]

  9. CEDAR Gas System

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