  A new detection system KRATTA, Krak\'ow Triple Telescope Array, is presented.
This versatile, low threshold, broad energy range system has been built to
measure the energy, emission angle, and isotopic composition of light charged
reaction products. It consists of 38 independent modules which can be arranged
in an arbitrary configuration. A single module, covering actively about 4.5 msr
of the solid angle at the optimal distance of 40 cm from the target, consists
of three identical, 0.500 mm thick, large area photodiodes, used also for
direct detection, and of two CsI(1500 ppm Tl) crystals of 2.5 and 12.5 cm
length, respectively. All the signals are digitally processed. The lower
identification threshold, due to the thickness of the first photodiode, has
been reduced to about 2.5 MeV for protons (~0.065 mm of Si equivalent) by
applying a pulse shape analysis. The pulse shape analysis allowed also to
decompose the complex signals from the middle photodiode into their ionization
and scintillation components and to obtain a satisfactory isotopic resolution
with a single readout channel. The upper energy limit for protons is about 260
MeV. The whole setup is easily portable. It performed very well during the
ASY-EOS experiment, conducted in May 2011 at GSI. The structure and performance
of the array are described using the results of Au+Au collisions at 400
MeV/nucleon obtained in this experiment.
