GaAs Microstrip Testbeam Results
msra(1995)
摘要
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$\mu$m and therefore an
expected resolution of 14.5$\mu$m. The measured resolution was approximately
14$\mu$m. By using a non-linear charge division algorithm this can be increased
to $\approx$ 12$\mu$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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关键词
high energy physics,limiting factor,gallium arsenide
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