The mission and on-board instruments
XIPE is designed to fit within a VEGA launcher. A sketch is shown in the figure below.
The XIPE scientific payload is divided in three main parts: the Mirror Assembly (MA), the Focal Plane Assembly (FPA) and the Control Electronics (CE). These are sketched in the figure below.
The mirror assembly
The Mirror Assembly comprises three identical Telescope Units (TUs), based on the long-heritage grazing-incidence reflection.
The focal plane assembly
XIPE detectors are photoelectric polarimeters based on the Gas Pixel Detector design (Costa, E. et al. (2001) Nature 411,662; Bellazzini, R., et al. (2006), NIM Phys. Res. A 566, 552; Bellazzini, R., et al. (2007), NIM Phys.Res. A 579, 853).