The HEPS project

Jiao, Yi; Xu, Gang; Cui, Xiaojuan; Duan, Zhe; Guo, Yuanyuan; He, Ping; Ji, Denghui; Li, Jing Yi; Li, Xiao Yu; Meng, Cai; Peng, Yuemei; Tian, Sai Ke; Wang, Jiu Qing; Wang, Na; Wei, Yuan; Xu, Haisheng; Yan, Fang; Yu, Cheng; Zhao, Yingtan; Qin, Qing

doi:10.1107/s1600577518012110

Cited by 141 publications

(47 citation statements)

References 12 publications

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“…We will discuss the KB mirrors (HKB and VKB) in this work. The source used is from the High Energy Photon Source (HEPS) project 3 , see Table 1 for the parameters. Figure 1.…”

Section: Reducing Computational Consumption By Means Of Coherent Modementioning

confidence: 99%

“…As more and more low emittance sources are been built or planned [1][2][3][4][5] , the coherence of the X-ray beam starts to play an important role. However, the great advances of coherent X-ray sources make the tolerances on optical elements more stringent if the high coherence originating at the source is to be preserved throughout the beamline.…”

Section: Introductionmentioning

confidence: 99%

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Perturbation perspective of partial coherence discussion on imperfect x-ray optical elements

Sutter

Wang

et al. 2020

Advances in Computational Methods for X-Ray Optics V

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The rapid development of new-generation synchrotron facilities with excellent coherence demands more accurate evaluation of beamline performance. A perturbation theory based on wave optics is proposed in this work to describe the effect of imperfections on the performance of X-ray optical elements. It shows that the perturbed performance of the non-ideal optical element could be derived from the perfect performance of the ideal optic through a convolution operation. The semi-analytical approach proposed here provides a new way to improve the simulation efficiency for imperfect optical elements. The finite aperture effect on diffraction-limited optics and focal shape distortion by surface height error are treated to show the application of the proposed method.

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“…We will discuss the KB mirrors (HKB and VKB) in this work. The source used is from the High Energy Photon Source (HEPS) project 3 , see Table 1 for the parameters. Figure 1.…”

Section: Reducing Computational Consumption By Means Of Coherent Modementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Perturbation perspective of partial coherence discussion on imperfect x-ray optical elements

Sutter

Wang

et al. 2020

Advances in Computational Methods for X-Ray Optics V

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show abstract

“…The source parameters to be used in this paper are from the High Energy Photon Source (HEPS) project (Jiao et al, 2018). We choose the horizontal direction for our discussion.…”

Section: Focusing With Perfect Optical Elementsmentioning

confidence: 99%

Fast convolution-based performance estimation method for diffraction-limited source with imperfect X-ray optics

Hu¹,

Sutter²,

Wang³

2020

J Synchrotron Radiat

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Although optical element error analysis is always an important part of beamline design for highly coherent synchrotron radiation or free-electron laser sources, the usual wave optics simulation can be very time-consuming, which limits its application at the early stage of the beamline design. In this work, a new theoretical approach has been proposed for quick evaluations of the optical performance degradation due to optical element error. In this way, time-consuming detailed simulations can be applied only when truly necessary. This approach treats the imperfections as perturbations that convolve with the ideal performance. For simplicity, but not by necessity, the Gaussian Schell-model has been used to show the application of this theoretical approach. The influences of the finite aperture size and height error of a focusing mirror are analysed using the proposed theory. The physical explanation of the performance degradation acquired from the presented approach helps to give a better definition of the critical range of error spatial frequencies that most affect the performance of a mirror. An example comparing two mirror surface errors with identical power spectral density functions is given. These two types of mirror surface errors result in very different intensity profiles. The approach presented in this work could help beamline designers specify the error tolerances on general optical elements more accurately.

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“…An increasing number of ultra-low-emittance storage-ring sources are coming into operation (Tavares et al, 2018;Raimondi, 2016;Liu et al, 2014) and more facility upgrades and new facilities are planned (Hettel, 2014;Streun et al, 2018;Schroer et al, 2018;Jiao et al, 2018). The increase in brightness as a result of the strongly reduced source size and divergence will foster new science, if X-ray optics can preserve the beam properties.…”

Section: Introductionmentioning

confidence: 99%

Hard X-ray wavefront correction via refractive phase plates made by additive and subtractive fabrication techniques

Seiboth

Brückner

Kahnt

et al. 2020

J Synchrotron Radiat

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Modern subtractive and additive manufacturing techniques present new avenues for X-ray optics with complex shapes and patterns. Refractive phase plates acting as glasses for X-ray optics have been fabricated, and spherical aberration in refractive X-ray lenses made from beryllium has been successfully corrected. A diamond phase plate made by femtosecond laser ablation was found to improve the Strehl ratio of a lens stack with a numerical aperture (NA) of 0.88 × 10−3 at 8.2 keV from 0.1 to 0.7. A polymer phase plate made by additive printing achieved an increase in the Strehl ratio of a lens stack at 35 keV with NA of 0.18 × 10−3 from 0.15 to 0.89, demonstrating diffraction-limited nanofocusing at high X-ray energies.

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The HEPS project

Abstract: Details of the High Energy Photon Source (HEPS), a 6 GeV green-field diffraction-limited storage ring light source to be built in China, are presented.

Cited by 141 publications

References 12 publications

Perturbation perspective of partial coherence discussion on imperfect x-ray optical elements

Perturbation perspective of partial coherence discussion on imperfect x-ray optical elements

Fast convolution-based performance estimation method for diffraction-limited source with imperfect X-ray optics

Hard X-ray wavefront correction via refractive phase plates made by additive and subtractive fabrication techniques

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