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arXiv · 1511.07668

Experimental comparison of various techniques for spot size measurement of high-energy x-ray source

Yi Wang·Qin Li·Nan Chen·Jinming Cheng·Chenggang Li·Wenhua Dai·Hong Li·Quanhong Long·Jinshui Shi·Jianjun Deng
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Abstract

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

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Yi Wang, Qin Li, Nan Chen, Jinming Cheng, Chenggang Li, Wenhua Dai, Hong Li, Quanhong Long, Jinshui Shi, Jianjun Deng. 2015-12-05. Experimental comparison of various techniques for spot size measurement of high-energy x-ray source. https://doi.org/10.1088/1674-1137%2F40%2F8%2F086205

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