Spot size measurement of a flash-radiography source using the pinhole imaging method

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Yi Wang, Qin Li, Nan Chen, Jin-Ming Cheng, Yu-Tong Xie, Yun-Long Liu and Quan-Hong Long. Spot size measurement of a flash-radiography source using the pinhole imaging method[J]. Chinese Physics C, 2016, 40(7): 076202. doi: 10.1088/1674-1137/40/7/076202
Yi Wang, Qin Li, Nan Chen, Jin-Ming Cheng, Yu-Tong Xie, Yun-Long Liu and Quan-Hong Long. Spot size measurement of a flash-radiography source using the pinhole imaging method[J]. Chinese Physics C, 2016, 40(7): 076202.  doi: 10.1088/1674-1137/40/7/076202 shu
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Received: 2015-11-12
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Spot size measurement of a flash-radiography source using the pinhole imaging method

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

Abstract: The spot size of the X-ray source is a key parameter of a flash-radiography facility, and is usually quoted as an evaluation of the resolving power. The pinhole imaging technique is applied to measure the spot size of the Dragon-I linear induction accelerator, by which a two-dimensional spatial distribution of the source spot is obtained. Experimental measurements are performed to measure the spot image when the transportation and focusing of the electron beam are tuned by adjusting the currents of solenoids in the downstream section. The spot size of full-width at half maximum and that defined from the spatial frequency at half peak value of the modulation transfer function are calculated and discussed.

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