The Sand-Glass Gas (SGG) detector: a position-sensitive micro-pattern gas detector

by Pawel Majewski (CNRS-IN2P3 Strasbourg and INFN Bari)

Friday 22 Feb 2002, 11:00 → 12:00 Europe/Zurich

13/2-005 (CERN)

The Sand-Glass Gas detector is a gaseous position-sensitive micro-pattern detector manufactured using the printed circuit board technique. It consists of two kapton foils, copper-clad on both sides and perforated by a high density matrix of holes, kept in electrical contact, thus forming triple electrode structure with holes having a Sand-Glass shape. The structure is placed in the middle between two parallel, conductive planes. Due to the symmetry of the electric field, electrons from avalanches are collected on the central electrode of the Sand-Glass holes. Signals are picked up independently on all three layers segmented into strips giving the possibility of 2-D positional information. The electrostatic field calculation and avalanche process simulation in the SGG will be presented as well as the results of the gas gain and energy resolution measurements in the gas mixtures Ar-iC4H10 (95-5) and Ar-CO2 (87.8-12.2) with 55 Fe X-rays source.

Organiser(s): Ariella CATTAI / EP Division