Speaker
Gianfranco Morello
(INFN Frascati)
Description
We report on the design and construction of a triple-GEM
detector as a new Inner Tracker (IT) for the KLOE-2 experiment
at the Frascati Phi-factory. This is the first GEM detector
equipping an experiment on a e+e- machine, where, besides the
outstanding rate capability already exploited on the hadron
machines, we fruitfully take advantage of the unique lightness
of such technology, of utmost importance to limit the multiple
scattering of low-momentum tracks in KLOE.
The IT is composed of four tracking layers, each providing an
independent 2-dimensional space point. Each layer is a fully
cylindrical triple-GEM detector with the five electrodes
(cathode, three GEM and anode/readout) constructed by using
cylindrical molds and sealed with a vacuum bag technique.
The front-end electronics is based on the GASTONE ASIC,
specifically developed for this detector, a charge amplifier
with digital output integrating 64 channels in one single chip.
After three years of R&D, including a new GEM manufacturing procedure tuned within the RD51 Collaboration, the
construction of the first layer has started, with the aim of
completing the detector by middle of 2012.
We report on the R&D achievements, including the construction
process, the results of two beam-tests with prototype detectors,
and the present realization status of the final detector and
electronics.
Author
Gianfranco Morello
(INFN Frascati)
