Planetary In-Situ X-Ray Imager for Core Samples

We propose to develop an in-situ X-ray imaging instrument to analyze core samples on the surface of a planet or planetesimal. The instrument will also serve as an X-ray computer tomography (XCT) instrument and X-ray spectrometer to map the chemical composition of the surface of the rock core when its surface is not shielded by an opaque container. The instrument will rely on a coring drill to collect and deliver the core sample. Several deployment scenarios are envisioned: analysis of ice cores that only require moderate acceleration voltage from the X-ray tube, analysis of rock cores bare or sealed in containers for sample-return, for which higher energy radiation is needed. The feasibility of a miniature ice-core XCT using technology readily qualified has been partly demonstrated in a preliminary study, the Phase I research will complete this task and demonstrate a proof-of-concept instrument. The engineering requirements of a rock core XCT will be investigated and compared to technology available for flight, especially with regard to high voltage components. The Phase II technical focus will depend on these findings.