Experimental comparison of various techniques for spot size measurement of high-energy X-ray sources

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Yi Wang, Qin Li, Nan Chen, Jin-Ming Cheng, Cheng-Gang Li, Hong Li, Quan-Hong Long, Jin-Shui Shi and Jian-Jun Deng. Experimental comparison of various techniques for spot size measurement of high-energy X-ray sources[J]. Chinese Physics C, 2016, 40(8): 086205. doi: 10.1088/1674-1137/40/8/086205
Yi Wang, Qin Li, Nan Chen, Jin-Ming Cheng, Cheng-Gang Li, Hong Li, Quan-Hong Long, Jin-Shui Shi and Jian-Jun Deng. Experimental comparison of various techniques for spot size measurement of high-energy X-ray sources[J]. Chinese Physics C, 2016, 40(8): 086205.  doi: 10.1088/1674-1137/40/8/086205 shu
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Received: 2015-11-30
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Experimental comparison of various techniques for spot size measurement of high-energy X-ray sources

    Corresponding author: Yi Wang,
  • 1. Key Laboratory of Pulsed Power, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, Sichuan Province, China

Abstract: In flash-radiography experiments, the quality of the acquired image strongly depends on the focal size of the X-ray source spot. A variety of techniques based on imaging of the pinhole, the slit and the rollbar are adopted to measure the focal spot size of the Dragon-I linear induction accelerator. The image of the pinhole provides a two-dimensional distribution of the X-ray spot, while those of the slit and the rollbar give a line-spread distribution and an edge-spread distribution, respectively. The spot size characterized by the full-width at half-maximum and that characterized by the LANL definition are calculated for comparison.

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