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Updated: Feb 11, 2026

Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
Published on: October 11, 2016
X-ray beam-position feedback system with easy-to-use beam-position monitor
Jae Yeon Park1, Yesul Kim2, Sangsul Lee1
1ITCC, Pohang Light Source, Jigokro 127, Pohang 37673, Republic of Korea.
Abstract:
X-ray beam-position stability is indispensable in cutting-edge experiments using synchrotron radiation. Here, for the first time, a beam-position feedback system is presented that utilizes an easy-to-use X-ray beam-position monitor incorporating a diamond-fluorescence screen. The acceptable range of the monitor is above 500 µm and the feedback system maintains the beam position within 3 µm. In addition to being inexpensive, the system has two key advantages: it works without a scale factor for position calibration, and it has no dependence on X-ray energy, X-ray intensity, beam size or beam shape.
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