The Kloe experimental activity is planned to continue at Dafne
upgraded in luminosity and energy. The challange is to improve
sistematics at the level demanded by the increase
of the integrated luminosity to 50 fb-1.
The vast physics program, concerning Ks, eta, kaon
interferometry, charged kaon decays, is focused on events
produced close to the interaction region, requiring an
optimization of the detection of low momentum tracks coming from
the IP and from the K+- decays.
Besides a normal revision of some subsystem (Drift Chamber, FEE,
DAQ, online/offline systems) the evolution of the apparatus
foresees the upgrade of the
scintillating fiber calorimeter and the insertions of two new
devices: a gg tagger and an inner tracker (IT).
For the calorimeter the plan is to substitute the present
photodetectors with higher granularity and/or higher QE devices.
The gg tagger is devoted to detect small angles interactions with
a technology of Si micro-strips and a plastic scintillator
hodoscope.
The Inner Tracker exploits a novel technology of fully
cylindrical GEM (Gas Electron Multiplier) detectors. It is
composed by 5 concentric layers providing a point space 2-D
measurement of the track. Each layer is a Triple-GEM chamber with
cathode and anode made of thin polyimide foils, in order to
reduce the material budget.
The result is an ultra-light and dead-zone free detector
representing a new step in the development of tracking devices
with gas detectors.
An overview of the performances of the Kloe2 apparatus will be
given, and a report on the R&D status of the detector upgrades
will be shown.
