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Development of Resistive Plate Chamber for charge particle detection

Development of Resistive Plate Chamber for charge particle detection. Suryanarayan Dash Under the guidance of Prof N K Mondal TIFR,Mumbai. Objectives :. Introduction Main feature of RPC RPC Fabrication RPC Theory & Operation Laboratory test set-up Analysis of results. Introduction.

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Development of Resistive Plate Chamber for charge particle detection

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  1. Development of Resistive Plate Chamber for charge particle detection Suryanarayan Dash Under the guidance of Prof N K Mondal TIFR,Mumbai

  2. Objectives: • Introduction • Main feature of RPC • RPC Fabrication • RPC Theory & Operation • Laboratory test set-up • Analysis of results

  3. Introduction Detectors:Searching for new particles To study their interaction • RPC the Resistive Plate Chamber detector was introduced in 1981 • Works on the principles of ionization of gas molecules to detect tracks of charge particles

  4. Main feature • Very large pulse height • Reduced cost per unit area • Easy fabrication and operation • Simple readout electronics • Good timing capability ,resolution is of the order of few ns

  5. Components of glass RPC : • Pair of float glass with resistivity 1012 Ω cm with 2 mm thick • 2 mm spacers • Gas mixture (typically Ar 30%,Freon 62%,isobutane 8%) • Ar: low cost,high specific ionization • Freon:high electron affinity • Isobutane:quencher • Gas nozzles • Graphite coating (good glass adhesion) for HV supply.

  6.   After graphite coating the surface resistivity 200-400 kΏ/ Finished RPC Frame

  7. Equivalent circuit of glass RPC

  8. RPC principles of operation μ Pulse height ~100 mV

  9. Laboratory test set-up with basic circuit

  10. Efficiency of RPC

  11. Typical TDC distribution

  12. Time resolution

  13. Typical ADC distribution

  14. Summary: • The time resolution of the present RPC ~1.8 ns at 9 kV • The efficiency of our present detector: 90% at 9 kV • Wide acceptance in HEP and Astroparticle community

  15. Thanks a lot .

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