Author/Authors :
Bellazzini، نويسنده , , R. and Bozzo، نويسنده , , M. and Brez، نويسنده , , A. and Gariano، نويسنده , , G. and Latronico، نويسنده , , L. and Lumb، نويسنده , , N. and Papanestis، نويسنده , , A. and Spandre، نويسنده , , G. and Massai، نويسنده , , M.M. and Raffo، نويسنده , , R. and Spezziga، نويسنده , , M.A.، نويسنده ,
Abstract :
We introduce the Micro-Groove Detector (MGD), a new type of two-dimensional position-sensitive gas proportional counter produced using advanced Printed Circuit Board (PCB) technology. The MGD is based on a thin kapton foil, clad with gold-plated copper on both sides. An array of micro-strips at a typical pitch of 200 μm is defined on the top metal layer. Using as a protection mask the metal left after the patterning, charge amplifying micro-grooves are etched into the kapton layer. These end on a second micro-strip pattern defined on the bottom metal plane. The two arrays of micro-strips can have an arbitrary relative orientation and so can be used for read-out to obtain 2-D positional information. First results from our systematic assessment of this device are reported: gas gain >15 000, rate capability above 106 mm−2 s−1, energy resolution 22% at 5.4 keV, no significant charging or aging effects up to 5 mC/cm and full primary charge collection efficiency even at high drift fields.
