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CMS Gas Systems

CMS Gas Systems. (Nitrogen, Argon & CO2). Overview. Different types Uses Layout of individual systems Consumption figures so far Operational troubling shooting Final Comments. Different types. Experimental gases Experimental gases required for specific experiments.

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CMS Gas Systems

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  1. CMS Gas Systems (Nitrogen, Argon & CO2) David Mcfarlane

  2. Overview • Different types • Uses • Layout of individual systems • Consumption figures so far • Operational troubling shooting • Final Comments David Mcfarlane

  3. Different types • Experimental gases • Experimental gases required for specific experiments. • Experimental primary gases • Nitrogen • Argon • CO2 • Flushing gases (Permanent inertion) • Nitrogen • Fire Suppression gases (Temporary inertion) • Nitrogen • Compressed air system • Nothing to do with this group!!!!!!!! David Mcfarlane

  4. Experimental gases • SF6, CF4, C2H2F4, Ar/H2 & I-C4H10 • These gases are used by RPC, CSC, DT and TOTEM. • Supplied from the SGX5 gas building. • Via the USC55 gas room into the UXC55 cavern David Mcfarlane

  5. Experimental Primary gases • Argon, CO2 & Nitrogen. • To be used by the detectors groups for use directly related to the operation of the detectors themselves and operation of control racks. • Eg, Argon is used as part of the mixture of the CSC system • Eg, Nitrogen is used to operate pneumatic valves within the control racks. • Supplied from the SGX5 building. • Stored in bottles, batteries (Argon has a dewar) • This system is controlled and operated by TS/LEA David Mcfarlane

  6. Primary gas layout David Mcfarlane

  7. Current Consumption figures(2007) David Mcfarlane

  8. Flushing gases(permanent inertion) • Nitrogen. • Used by several experiments to flush areas between detectors to insure an inert,dry and helium free atmosphere is maintained. • Eg, Tracker. • Supplied from a 50m3 dewar located just outside SDX5. • The Dewar is controlled and operated by AT. • This system is controlled and operated by CMS. David Mcfarlane

  9. Flushing gas layout David Mcfarlane

  10. Fire Suppression gases(Temporary inertion) • Nitrogen. • Used only in the event of a fire being detected inside the detector. • Supplied from 2 tanks located just outside the SGX5 building. • This system is controlled and operated by PH. David Mcfarlane

  11. Fire Suppression layout David Mcfarlane

  12. Operational troubling shooting • No piquet is forseen from TS/LEA • Who to contact? • TS/LEA – Mats Wilhelmsson • CMS –Christoph Schäfer/ Gerd Fetchenhauer • AT – Goran Perinic • PH – Stefan Haider / Mar Capeans • Possible failure areas? • Unreported increases in consumption David Mcfarlane

  13. Final comments • The 3 Nitrogen systems are completely separate. • They are supplied from different sources • Different people are responsible for different systems • DO NOT “MIX & MATCH!!!!!” • If the experimental Nitrogen system fails, then all of the detector control racks will stop working!!! • Before using any of these systems, make sure you inform the correct operator of your estimated consumption and flow rate figures. David Mcfarlane

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