A new multiplexing scheme for cathode-strip readout chambers

doi:10.1016/0168-9002(92)90862-X

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Volume 311, Issues 1–2, 1 January 1992, Pages 168-172

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Abstract

A multiplexing scheme for cathode strip chamber readouts which is cost-effective and efficient is described. This scheme provides an inexpensive alternative to individual-wire readout schemes, while not compromising the attractive qualities of cathode-strip chambers. A chamber with an area of 72×36 cm was built and tested. A position resolution of 130±50 μm (FWHM) was obtained with the multiplexing scheme. Details of the construction and operation of the cathode-strip chamber and its response to cosmic rays are presented here.

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We investigate the ultimate resolution one can expect from a properly designed cathode strip chamber and present results of beam tests of chamber prototypes. Design considerations must include mechanical aspects such as width of the cathode pads, anode-cathode spacing, achievement of gain uniformity, and so on, as well as minimization of electronic noise and choice of an appropriate gas. In beam tests we have demonstrated single-plane resolution of 40 μm (σ) using 2.5 mm strips, and consistent space point resolution from stereo planes. True space points are available because the same avalanche may be viewed from two segmented cathode planes having a relative stereo angle. This capability, coupled with the freedom to choose a cathode pad pattern appropriate for the particular application, makes the technique superior in many situations. The achievable resolution approaches that of silicon or gas microstrip chambers but with only a fraction of the electronics channels for the same sensitive area. The beam test included exposure of the detector to multi-track events so that its ability to resolve nearby multiple hits could be observed.
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Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Abstract

References (9)

Nucl. Instr. and Meth.

Nucl. Instr. and Meth.

Nucl. Instr. and Meth.

Nucl. Instr. and Meth.

Nucl. Instr. and Meth.

Cited by (2)

Precision interpolating pad chambers

Analyzing powers for the π<sup>-</sup>p<sup>→</sup> → π<sup>0</sup>n reaction across the Δ(1232) resonance