Performance study of a cesium iodide photocathode-based UV photon detector in Ar/CH4 mixture

Baishali, G and Radhakrishna, V and Koushal, V and Rakhee, K and Rajanna, K (2015) Performance study of a cesium iodide photocathode-based UV photon detector in Ar/CH4 mixture. In: PHOTONICS RESEARCH, 2 (3). pp. 92-96.

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Abstract

The detection efficiency of a gaseous photomultiplier depends on the photocathode quantum efficiency and the extraction efficiency of photoelectrons into the gas. In this paper we have studied the performance of an UV photon detector with P10 gas in which the extraction efficiency can reach values near to those in vacuum operated devices. Simulations have been done to compare the percentage of photoelectrons backscattered in P10 gas as well as in the widely used neon-based gas mixture. The performance study has been carried out using a single stage thick gas electron multiplier (THGEM). The electron pulses and electron spectrum are recorded under various operating conditions. Secondary effects prevailing in UV photon detectors like photon feedback are discussed and its effect on the electron spectrum under different operating conditions is analyzed. (C) 2014 Chinese Laser Press

Item Type:	Journal Article
Publication:	PHOTONICS RESEARCH
Publisher:	OPTICAL SOC AMER
Additional Information:	Copy right for this article belongs to the OPTICAL SOC AMER, 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
Keywords:	GEM PHOTOMULTIPLIER; ELECTRON MULTIPLIERS; CSI PHOTOCATHODE; OPERATION
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	29 May 2015 06:41
Last Modified:	29 May 2015 06:41
URI:	http://eprints.iisc.ac.in/id/eprint/51621

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