Prototyping and study ofGlass Spark Chamber detectors

B.SatyanarayanaTIFR, Mumbai

January 9, 2003 Prototyping and study of Glass Spark Chamber detectors

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Materials for the chamber fabrication

Glass Modi float glass 2mm thick Measured Mean 2.017 & RMS 0.013 Resistivity ~1012-cm Surface preparation

January 9, 2003 Prototyping and study of Glass Spark Chamber detectors

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Materials for the chamber fabrication

Carbon powder Special high grade Kolloidgraphite

40019 Nikunj Eximp Enterprises (P) Ltd Fixed carbon 94/96%, Mesh size –800/1000

January 9, 2003 Prototyping and study of Glass Spark Chamber detectors

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Materials for the chamber fabrication

Coating Mixed with thinner and lacquer Applied with spray gun Various proportions tried

January 9, 2003 Prototyping and study of Glass Spark Chamber detectors

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Graphite resistance

January 9, 2003 Prototyping and study of Glass Spark Chamber detectors

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Materials for the chamber fabrication

Argon 44%

Isobutane 4%

Freon-R22 52%

January 9, 2003 Prototyping and study of Glass Spark Chamber detectors

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Spacers for glass plates

January 9, 2003 Prototyping and study of Glass Spark Chamber detectors

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Acrylic frame for the chamber

January 9, 2003 Prototyping and study of Glass Spark Chamber detectors

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Exploded view of the chamber

January 9, 2003 Prototyping and study of Glass Spark Chamber detectors

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Model of an assembled chamber

January 9, 2003 Prototyping and study of Glass Spark Chamber detectors

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Typical signal from the chamber

January 9, 2003 Prototyping and study of Glass Spark Chamber detectors

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Cosmic Ray Test setup

January 9, 2003 Prototyping and study of Glass Spark Chamber detectors

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Counting rate of the chamber

January 9, 2003 Prototyping and study of Glass Spark Chamber detectors

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Present status

Detector efficiency is the main problem

Gas mixture, carbon coating Procuring various gases and mixer Need to improve timing