Abstract
We studied profile-based detectors with external pick-up strips (Iarocci-type tubes) with the purpose to find out if they can be used as detectors of large area and high spatial resolution. In this paper we summarize our measurements and calculations. Contributions of different factors in the spatial resolution were theoretically evaluated. The resolution of ∼ 45 μm in the proportional mode and ∼ 100 μm in the limited streamer mode were obtained in a laser beam. The former was limited by electronic noise and the latter by the intrinsic streamer fluctuations. The resolution of ∼ 80 μm in proportional mode was achieved in a muon beam (by subtracting the electronic noise contribution, we estimate that the limit for our prototype was around 60–65 μm).
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