Affiliations: [a] Department of Radiological Science, Catholic University of Daegu, Hayang-ro, Hayang, Gyeongsan, Gyeongbuk, Republic of Korea
| [b] Department of Radiologic Technology, Daegu Health College, Youngsong-ro, Buk-gu, Daegu, Republic of Korea | [c] Pohng Accelerator Laboratory, Nam-gu, Pohng, Gyeongbuk, Republic of Korea
| [d] Department of Mechanical Engineering, Chubu University, Matsumoto-cho, Kasugai, Aichi, Japan
Correspondence:
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Corresponding author: Kwon Su Chon, Department Radilogical Science, Catholic University of Daegu, 13-13 Hayang-ro, Hayang, Gyeongsan, Gyeongbuk 38430, Republic of Korea. Tel.: +82 53 850 2521; Fax: +82 53 359 6761; E-mail: kschon@cu.ac.kr.
Abstract: BACKGROUND:Mono-capillary optics have been applied to increase the performance of X-ray instruments. However, performance of a mono-capillary optic strongly depends on the shape accuracy, which is determined by the diameters of the inner hollow of the capillary along the axial direction. OBJECTIVE:To precisely determine the inner diameter of the capillary optic used in X-ray imaging technique, which aims to replace the conventional method using a visible microscope. METHODS:High spatial resolution X-ray images of the mono-capillary optic were obtained by a synchrotron radiation beamline. The inner diameter of the mono-capillary optic was measured and analyzed by the pixel values of the X-ray image. RESULT:Edge enhancement effect was quite useful in determining the inner diameter, and the accuracy of the diameter determination was less than 1.32 μm. Many images obtained by scanning the mono-capillary optic along the axial direction were combined, and the axial profile, consisting of diameters along the axial direction, was obtained from the combined image. The X-ray imaging method could provide an accurate measurement with slope error of±19 μrad. CONCLUSIONS:Applying X-ray imaging technique to determine the inner diameter of a mono-capillary optic can contribute to increasing fabrication accuracy of the mono-capillary optic through a feedback process between the fabrication and measurement of its diameter.
