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arXiv · 1203.3658

Development and preliminary tests of resistive microdot and microstrip detectors

P. Fonte·E. Nappi·P. Martinengo·R. Oliveira·V. Peskov F. Pietropaolo·P. Picchi
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Abstract

In the last few years our group have focused on developing various designs of spark-protected micropattern gaseous detectors featuring resistive electrodes instead of the traditional metallic ones: resistive microstrip counters, resistive GEM, resistive MICROMEGAS. These detectors combine in one design the best features of RPCs (spark-protection) and micropattern detectors (a high position resolution). In this paper we report the progress so far made in developing other types of resistive micropattern detectors: a microdot-microhole detector and a microgap-microstrip detector. The former detector is an optimal electron amplifier for some special designs of dual phase noble liquid TPCs, for example with a CsI photocathode immersed inside the noble liquid. Preliminary tests of such a detector, for the first time built and investigated, are reported in this paper. The latter detector is mainly orientated towards medical imaging applications such as X-ray scanners. However, we believe that after a proper gas optimization, these detectors could also achieve a high time resolution and could thus be used in applications as TOF-PET, detection of charged particles with simultaneous high time and position resolution etc.

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P. Fonte, E. Nappi, P. Martinengo, R. Oliveira, V. Peskov F. Pietropaolo, P. Picchi. 2012-03-16. Development and preliminary tests of resistive microdot and microstrip detectors. https://doi.org/10.1088/1748-0221/7/12/p12003

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