Crystal Eye: an instrument with a wide view of the MeV sky to study the astrophysical photons

Crystal Eye is a new concept of space-based all-sky monitor for the observation of 10 keV $-$ 30 MeV photons exploiting a novel detection technique, which foresees enhanced localization capability and functionality in an unprecedented energy range with respect to the current instruments. This is now possible, thanks to the use of new materials (scintillator crystals) and sensors (like silicon photomultipliers). The primary scientific goal is the detection of the electromagnetic signal of extreme phenomena in the Universe. In order to study these sources better, with different messengers to get the overall physical picture as much as possible, the satellite will provide an alert to both space and ground based experiments. The full scale design of the detector has been optimized and the engineering qualification model is going to be realized at this stage. Furthermore, a scaled prototype made of three full size pixels is being realized to fly aboard the Space Rider robotic space laboratory (by European Space Agency) on a low-Earth orbit for a tentative life-time of two months in 2027, with the aim to characterize the background at the orbit and verify the new technology for space use. We present here the instrumental setup and calculation of its sensitivity and performances using Monte Carlo simulation of the full detector configuration in the speculative working environment.