Performance of polycapillary x‐ray lens for x‐ray sources with various spot sizes |
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| Authors: | Tianxi Sun Zhiguo Liu Xunliang Ding |
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| Institution: | 1. The Key Laboratory of Beam Technology and Materials Modification of Ministry of Education, Beijing Normal University, Beijing, 100875, China;2. Institute of Low Energy Nuclear Physics, Beijing Normal University, Beijing, 100875, China;3. Beijing Radiation Center, Beijing, 100875, China;4. Beijing Radiation Center, Beijing, 100875, ChinaThe Key Laboratory of Beam Technology and Materials Modification of Ministry of Education, Beijing Normal University, Beijing, 100875, China. |
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| Abstract: | The performance of a polycapillary x‐ray lens (PCXRL) is related to the spot size of the x‐ray source. The transmission efficiency of the PCXRL decreases generally with the increase of the x‐ray source spot size. Both the output focal spot size of a focusing PCXRL and the divergence of a parallel PCXRL increase with increasing source spot size. A large source spot size results in more ‘escape halo’, which affects the measured transmission efficiency and the measured output focal spot size. Copyright © 2007 John Wiley & Sons, Ltd. |
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