Abstract
The spatial resolution of the multistep avalanche chambers is considered. The intrinsic spatial resolution (the full width at half-maximum) of these chambers is 260 μm. The influence of the signal amplitude on the spatial resolution of the chambers under irradiation by β particles is investigated. By analyzing the signal amplitude and selectively measuring the coordinates, or by estimating the signal amplitude and its contribution to the reconstructed image, it will be possible to raise the spatial resolution twofold to 0.5 and 1.0 mm for isotropic radiation of 14C and 32P isotopes, respectively. In addition, the spatial resolution can be improved significantly when electrons escaping from solid-state neutron or γ-ray converters are detected.
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