Status of the cylindrical-GEM project for the KLOE-2 inner tracker

Nuclear Inst. and Methods in Physics Research, A(2011)

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Abstract
We present the status of the R&D on the Cylindrical-GEM (CGEM) detector as Inner Tracker for the upgrade of the KLOE experiment at the DA¿NE ¿-Factory. The R&D activity spreads on different lines: construction and complete characterization of the full size CGEM prototype, equipped with 650¿m pitch 1-D longitudinal strips; characterization of the single-mask GEM technology for the realization of large area GEM foils; study of the 2-D, XV patterned, readout strips performed with small planar prototypes in a dedicated test at the H4-SPS beam facility, in presence of a magnetic field (up to 1.5T intensity). In addition, for the design of the final detector a finite element simulation of the mechanics together with specific load tests of the materials and the structure used for the construction of the prototype have been carried out.
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Key words
tracking,kloe-2,gem,strips,gas electron multiplier,spatial resolution,prototypes,structural beams,construction industry,detectors,magnetic field,physics
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