Baishali, G and Radhakrishna, V and Koushal, V and Rakhee, K and Rajanna, K (2013) Study on the detection efficiency of gaseous photomultipliers. In: Conference on Advanced Photon Counting Techniques VII, MAY 01-02, 2013, Baltimore, MD.
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Efficient photon detection in gaseous photomultipliers require maximum photoelectron yield from the photocathode surface and also detection of them. In this work we have investigated the parameters that affect the photoelectron yield from the photocathode surface and methods to improve them thus ensuring high detection efficiency of the gaseous photomultiplier. The parameters studied are the electric field at the photocathode surface, surface properties of photocathode and pressure of gas mixture inside the gaseous photomultiplier. It was observed that optimized electric field at the photocathode ensures high detection efficiency. Lower pressure of filled gas increases the photoelectron yield from the photocathode surface but reduces the focusing probability of electrons inside the electron multiplier. Also evacuation for longer duration before gas filling increases the photoelectron yield.
| Item Type: | Conference Paper |
|---|---|
| Series.: | Proceedings of SPIE |
| Publisher: | SPIE-International Society for Optical Engineering |
| Additional Information: | Copyright of this article belongs to SPIE-International Society for Optical Engineering. |
| Keywords: | Gaseous Photomultiplier; Photocathode; Cesium Iodide; Gas Electron Multiplier; Detection Efficiency |
| Department/Centre: | Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics |
| Date Deposited: | 23 Sep 2013 08:47 |
| Last Modified: | 23 Sep 2013 08:47 |
| URI: | http://eprints.iisc.ac.in/id/eprint/47412 |
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