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Development of RPCs for INO

Development of RPCs for INO. B.Satyanarayana TIFR, Mumbai, INDIA bsn@tifr.res.in. Principle of operation. RPC test setup. Telescope. Cosmic muon trigger and timing. NIM and CAMAC electronics. Telescope rate monitoring. Gas mixing unit. Typical efficiency plot. Studies with gas mixtures.

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Development of RPCs for INO

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  1. Development of RPCs for INO B.Satyanarayana TIFR, Mumbai, INDIA bsn@tifr.res.in The 6th ACFA Workshop on Physics and Detector at Linear Collider, TIFR, Mumbai, December 15-17, 2003

  2. Principle of operation The 6th ACFA Workshop on Physics and Detector at Linear Collider, TIFR, Mumbai, December 15-17, 2003

  3. RPC test setup Telescope The 6th ACFA Workshop on Physics and Detector at Linear Collider, TIFR, Mumbai, December 15-17, 2003

  4. Cosmic muon trigger and timing The 6th ACFA Workshop on Physics and Detector at Linear Collider, TIFR, Mumbai, December 15-17, 2003

  5. NIM and CAMAC electronics The 6th ACFA Workshop on Physics and Detector at Linear Collider, TIFR, Mumbai, December 15-17, 2003

  6. Telescope rate monitoring The 6th ACFA Workshop on Physics and Detector at Linear Collider, TIFR, Mumbai, December 15-17, 2003

  7. Gas mixing unit The 6th ACFA Workshop on Physics and Detector at Linear Collider, TIFR, Mumbai, December 15-17, 2003

  8. Typical efficiency plot The 6th ACFA Workshop on Physics and Detector at Linear Collider, TIFR, Mumbai, December 15-17, 2003

  9. Studies with gas mixtures The 6th ACFA Workshop on Physics and Detector at Linear Collider, TIFR, Mumbai, December 15-17, 2003

  10. Typical timing distribution plot The 6th ACFA Workshop on Physics and Detector at Linear Collider, TIFR, Mumbai, December 15-17, 2003

  11. Typical time response plot The 6th ACFA Workshop on Physics and Detector at Linear Collider, TIFR, Mumbai, December 15-17, 2003

  12. Typical time resolution plot The 6th ACFA Workshop on Physics and Detector at Linear Collider, TIFR, Mumbai, December 15-17, 2003

  13. Typical charge distribution plots The 6th ACFA Workshop on Physics and Detector at Linear Collider, TIFR, Mumbai, December 15-17, 2003

  14. Typical mean charge plot The 6th ACFA Workshop on Physics and Detector at Linear Collider, TIFR, Mumbai, December 15-17, 2003

  15. Typical noise rate plot The 6th ACFA Workshop on Physics and Detector at Linear Collider, TIFR, Mumbai, December 15-17, 2003

  16. Typical cross-talk plots The 6th ACFA Workshop on Physics and Detector at Linear Collider, TIFR, Mumbai, December 15-17, 2003

  17. Summary of cross-talk measurements The 6th ACFA Workshop on Physics and Detector at Linear Collider, TIFR, Mumbai, December 15-17, 2003

  18. Effects of wet gases The 6th ACFA Workshop on Physics and Detector at Linear Collider, TIFR, Mumbai, December 15-17, 2003

  19. Recovering a damaged RPC • Purging with pure Argon at high flow rate. • Bubbling pure Argon through pure ethyl alcohol. • Bubbling pure Argon through 25% Ammonia solution for 24 hours without electric field. • Recovers efficiency and brings down noise rate. • Detailed studies underway. The 6th ACFA Workshop on Physics and Detector at Linear Collider, TIFR, Mumbai, December 15-17, 2003

  20. RPC recovery plots No of hours of gas flow The 6th ACFA Workshop on Physics and Detector at Linear Collider, TIFR, Mumbai, December 15-17, 2003

  21. Future plans • Study of effect of wet gases on RPC performance, aging etc. • Study of pickup strip materials, geometries & pulse characteristics • Long term studies with small chambers. • Improvements in the gas mixing unit, Cosmic test setup, etc. • Procurement of dry gases. • Production of 120cm X 90cm RPCs for prototype detector The 6th ACFA Workshop on Physics and Detector at Linear Collider, TIFR, Mumbai, December 15-17, 2003

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