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GaAs Microstrip Testbeam Results

S. Gowdy
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Abstract

A gallium arsenide detector was tested with a beam of 70GeV pions at the {\sf SPS} at CERN. The detector utilises a novel biasing scheme which has been shown to behave as expected. The detector has a pitch of 50$μ$m and therefore an expected resolution of 14.5$μ$m. The measured resolution was approximately 14$μ$m. By using a non-linear charge division algorithm this can be increased to $\approx$ 12$μ$m. Noise was the limiting factor to the resolution. This was 2000e$^-$ as opposed to the expected 360e$^-$. This noise is also thought to have reduced the detection efficiency of the detector. The source of the excess noise is currently being investigated.

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S. Gowdy. 1995-09-14. GaAs Microstrip Testbeam Results. https://arxiv.org/abs/hep-ex/9509008

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