FURTHER STUDIES OF THE SAND-GLASS GAS (SGG) DETECTOR

The Sand-Glass Gas detector is a position-sensitive micro-pattern detector manufactured using printed circuit board technique. It consists of two kapton foils, copper-clad on both sides and perforated by a high density holes, kept in electrical contact, thus forming triple electrode structure. The structure is placed in a middle between two parallel, conductive planes. With a symmetric electric field in the holes of the structure all avalanche electrons 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 are presented. 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 ⁵⁵Fe X-rays source are reported.