LIC and LID considerations in the design and implementation of the MEMS   laser pointing mechanism for the EUSO UV laser altimeter
  The EUSO (Extreme Universe Space Observatory) project is developing a new mission concept for the scientific research of Ultra High Energy Cosmic Rays (UHECRs) from space. The EUSO wide-field telescope will look down from space onto the Earth night sky to detect UV photons emitted from air showers generated by UHECRs in our atmosphere. In this article we concentrate on the mitigation strategies agreed so far, and in particular on the implementation of a careful early selection and testing of subsystem materials (including optics), design and interfaces of the subsystem and an optimization of the instrument operational concept. 
Enrico Bozzo, Thomas Burch, Alessandra Ciapponi, Clemens Heese, Arno   Hoogerwerf, Nicholas Lan, Andrii Neronov, Vincent Rev...
astro-ph.IM