Numerical design of polycapillary X-ray optics as both a focusing X-ray lens and a vacuum window

Abstract Polycapillary X-ray optics as a new application is proposed to be used as both a focusing X-ray lens and a vacuum window placed in the middle part which connected X-ray source in a clearly high vacuum with sample or detector in a moderate vacuum. Numerical results showed that such polycapillary X-ray optics had a low vacuum conductance, and it could be accordingly used as both such vacuum window for an X-ray source in a clearly high vacuum and a focusing X-ray lens at the same time.