Author/Authors :
Barvich، نويسنده , , T and Blüm، نويسنده , , P and Erdmann، نويسنده , , M and Fahrer، نويسنده , , M and Kنrcher، نويسنده , , K and Kühn، نويسنده , , F and Mِrmann، نويسنده , , D and Müller، نويسنده , , Th. and Neuberger، نويسنده , , D and Rِderer، نويسنده , , F and Simonis، نويسنده , , H.J. and Skiba، نويسنده , , A and Thümmel، نويسنده , , W.H. and Weiler، نويسنده , , Th. and Weseler، نويسنده , , S، نويسنده ,
Abstract :
The construction of a micro-pattern gas detector of dimensions 40×10 cm2 is described. Two gas electron multiplier foils (GEM) provide the internal amplification stages. A two-layer readout structure was used, manufactured using the same technology as the GEM foils. The strips of each layer cross at an effective crossing angle of 6.7° and have a 406 μm pitch. The performance of the detector has been evaluated in a muon beam at CERN using a silicon telescope as reference system. The position resolutions of two orthogonal coordinates are measured to be 50 μm and 1 mm, respectively. The muon detection efficiency for two-dimensional space points reaches 96%.
Keywords :
detector , Position sensitive , Two-layer readout , GEM
