Cristina Consolandi
"GEANT4-BASED APPLICATION DEVELOPMENT FOR NIEL CALCULATION IN THE SPACE RADIATION ENVIRONMENT"
In the Space Radiation Environment, instruments are subject to Radiation Damage. To test their reliability one has to know the fluxes of energetic particles and has to be able to quantify their energy deposition. The Geant4 toolkit, via its multilevel approach, enables physicists to reproduce the Space Radiation Environment. In this work we report the results obtained with an improved implementation of the already existing single scattering model allowing to simulate the recoil of high energy ions. This gives the possibility to calculate the Coulomb Scattering contribution to the Non-Ionizing Energy Loss (NIEL) for the complete energy range of interest. Moreover the Galactic Cosmic Ray fluxes of the ISO Model [15390] are introduced in Geant4.

Sebastiano Spinelli
"THE OPTICAL LAYOUT OF THE QUBIC FIZEAU COMBINER"
In the framework of CMB polarizationexperiments that target the detection of B-modes, QUBIC (http://www.qubic.org/) is an orthogonal one, based on the concept of large band bolometric interferometry. Signal combination in QUBIC will be done optically, using a Fizeau com- biner. To guarantee a clean detection of B modes the optical combiner has to pro- duce interference fringes that are 10^-2 rads stable in phase and 10^-2 in relative intensity. These limits constrain the error on the power spectrum due this instabilities to a level lower than 10%. The optical definition of the problem is discussed and the simulation results on various optical layouts with ZEMAX simulation code presented.