Lightweight High-Energy X-ray Source for In-Space Nondestructive Evaluation

Long-duration space operation require novel convenient methods of in-space manufacturing. Additive manufacturing (AM) is ideal for the space industry, where part production is low volume and highly customized. However, in order to be fully implemented, the AM components must be inspected for seeing hidden flaws via non-destructive evaluation (NDE). In order to enable accurate NDE of in-space fabricated objects by radiography or computed tomography methods, the MeV-grade X-ray source is required. Although electron linacs represent a mature technology, with an established industrial base, at the present there is no state-of-the-art device suitable for in-space applications. In this project, we will develop a hand-portable X-ray source based on a 2.0 MeV electron linac. The mass and size reduction will be achieved thanks to the operation in Ku-band regime enabled by the revolutionary split linac fabrication technology and novel Marx modulators. In Phase I, we will design the modulator, the X-ray conversion system, and optimize the layout of peripheral components to keep the total weight within 50 lbs. In Phase II, we will build and test the full linac system and fully demonstrate the designed beam and X-ray parameters.