Transmission characteristics of soft X-ray through capillary

Experimental research on X-ray guiding capillaries is the foundation of X-ray lens design. The experimental results of measuring transmission efficiency within the energy range of 50 eV~1.5 keV for a variety type of capillaries are presented, including different materials, different inner radius and different bent radius. It is shown that the transmission efficiency of curved capillary increases with the decrease of the X-ray energy, the inner diameter of capillary, and the bend radius of curved capillary. As a result, the capillary manufactured of glass DM308 with an inner diameter of 0.45 mm and an outer diameter of 0.60 mm is the best choice for the soft X-ray lens.