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

Yi Wang; Qin Li; Nan Chen; Jin-Ming Cheng; Cheng-Gang Li; Hong Li; Quan-Hong Long; Jin-Shui Shi; Jian-Jun Deng

doi:10.1088/1674-1137/40/8/086205

Chinese Physics C> 2016, Vol. 40> Issue(8) : 086205 DOI: 10.1088/1674-1137/40/8/086205

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

1.
Key Laboratory of Pulsed Power, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, Sichuan Province, China

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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.
- linear induction accelerator ,
- spot size ,
- pinhole ,
- slit ,
- rollbar

References

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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

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

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

Received Date: 2015-11-30

Available Online: 2016-08-05

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

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