CERN Accelerating science

Article
Report number	physics/0307152
Title	Position Sensing from Charge Dispersion in Micro-Pattern Gas Detectors with a Resistive Anode
Author(s)	Dixit, M S (Carleton U. ; TRIUMF) ; Dubeau, J (DETEC, Quebec) ; Martin, J P (Montreal U.) ; Sachs, K (Carleton U.)
Publication	2004
Imprint	30 Jul 2003
Number of pages	14
In:	Nucl. Instrum. Methods Phys. Res., A 518 (2004) 721-727
DOI	10.1016/j.nima.2003.09.051
Subject category	Other Fields of Physics
Abstract	Micro-pattern gas detectors, such as the Gas Electron Multiplier (GEM) and the Micromegas need narrow high density anode readout elements to achieve good spatial resolution. A high-density anode readout would require an unmanageable number of electronics channels for certain potential micro-detector applications such as the Time Projection Chamber. We describe below a new technique to achieve good spatial resolution without increasing the electronics channel count in a modified micro-detector outfitted with a high surface resistivity anode readout structure. The concept and preliminary measurements of spatial resolution from charge dispersion in a modified GEM detector with a resistive anode are described below.

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