Effect of X-ray wavelength, pinhole aperture and magnification on spatial resolution

Yuan Yongteng; Hou Lifei; Tu Shaoyong; Cao Zhurong; Zhan Xiayu; Hao Yidan; Jiang Shaoen; Miao Wenyong

doi:10.3788/HPLPB201426.022001

Volume 26 Issue 02

Jan. 2014

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Article Navigation > High Power Laser and Particle Beams > 2014 > 26(02): 022001

Qiu Weicheng, Wang Rui, Xu Zhongjie, et al. Optical crosstalk of HgCdTe PV linear array detector[J]. High Power Laser and Particle Beams, 2012, 24: 2324-2330. doi: 10.3788/HPLPB20122410.2325

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Yuan Yongteng, Hou Lifei, Tu Shaoyong, et al. Effect of X-ray wavelength, pinhole aperture and magnification on spatial resolution[J]. High Power Laser and Particle Beams, 2014, 26: 022001. doi: 10.3788/HPLPB201426.022001

Qiu Weicheng, Wang Rui, Xu Zhongjie, et al. Optical crosstalk of HgCdTe PV linear array detector[J]. High Power Laser and Particle Beams, 2012, 24: 2324-2330. doi: 10.3788/HPLPB20122410.2325

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Effect of X-ray wavelength, pinhole aperture and magnification on spatial resolution

doi: 10.3788/HPLPB201426.022001

1.
Research Center of Laser Fusion,CAEP,Mianyang 621900,China

Received Date: 2013-08-27
Rev Recd Date: 2013-10-23
Publish Date: 2014-02-15

Abstract

Abstract

X-ray pinhole imaging is an important diagnostic tool in inertial confinement fusion (ICF). The point spread function (PSF) of the X-ray pinhole imaging can be used to restore the initial image and estimate the spatial resolution. This paper analyzes relations among X-ray wavelength, size of pinhole aperture, magnification and also simplified Fresnel diffraction formula. The PSF of the X-ray pinhole imaging was derived numerically using Fresnel diffraction integral. Fresnel diffraction simulated the optimal pinhole aperture, X-ray wavelength and magnification with optimal spatial resolutions and an excellent signal-to-noise ratio. The calibration of the sample was used to gain the modulation transfer function (MTF) of the whole framing camera imaging system, and Fresnel diffraction simulated the PSF of the pinhole imaging, so the PSF of the framing camera was deduced. We also obtained the PSF of the framing camera by measuring its edge function, the two results were unanimous and showed the method to stimulate X-ray pinhole imaging by using Fresnel diffraction is feasible.
- X-ray pinhole imaging,
- point spread function,
- modulation transfer function,
- spatial resolution

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