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

Yi Wang; Qin Li; Nan Chen; Jin-Ming Cheng; Yu-Tong Xie; Yun-Long Liu; Quan-Hong Long

doi:10.1088/1674-1137/40/7/076202

Chinese Physics C> 2016, Vol. 40> Issue(7) : 076202 DOI: 10.1088/1674-1137/40/7/076202

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

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

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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.
- spot size ,
- X-ray source ,
- pinhole ,
- linear induction accelerator

References

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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

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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

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

Received Date: 2015-11-12

Available Online: 2016-07-05

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

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