Micro-gap parallel-plate chambers with porous secondary electron emitters


Fonte P., Peskov V.

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, cilt.454, sa.1, ss.260-266, 2000 (SCI-Expanded) identifier identifier identifier

Özet

We developed a micro-gap (0.1 mm) parallel-plate chamber with one or more layers of solid converters of radiation. The detector with a one-layer converter was tested with X-rays (6-30 keV) and also at the T9 and T10 beam facilities at CERN. A position resolution better than 30 mum was achieved. With minimum ionizing particles, efficiency close to similar to 20% was achieved with one detector, and it was almost twice as high as the efficiency due to the interaction of minimum ionizing particles with the gas alone. The detectors with a few layers of converter were tested only with X-rays. An efficiency of similar to 10% could be achieved. The combination of a micro-gap PPC with secondary-electron converters may allow a further improvement of the time resolution of these detectors, which has already reached 50-100 ps at present. (C) 2000 Elsevier Science B.V. All rights reserved.