Physical design of a cryogenic delta–knot undulator for the High Energy Photon Source

Li, X.Y.; Lu, Huihua; Sun, Shuchen

doi:10.1016/j.nima.2020.164639

Cited by 6 publications

(4 citation statements)

References 14 publications

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“…However, despite the high level of automation at macromolecular crystallography synchrotron X-ray beamlines 20 – 26 , the scope of hardware automation at coherent X-ray scattering beamlines (i.e., XPCS, X-ray coherent diffraction imaging, X-ray ptychography) is quite limited in general, primarily because the throughput of coherent x-ray scattering measurements has been traditionally limited by the amount of available coherent x-ray flux. This limitation is now being gradually lifted by the worldwide construction and commissioning of fourth-generation x-ray sources 27 – 30 , which increases the coherent flux by at least 10 2 and the measurement throughput by 10 4 , leading to a reduction of sample turnaround time from as long as 15 h 31 to less than 5 s. Development of high-throughput, closed-loop XPCS protocol is therefore opportune and can be further combined with AI-assisted XPCS analysis 32 , 33 to achieve self-driving, autonomous design of complex fluids with tailored material properties.…”

Section: Introductionmentioning

confidence: 99%

Robotic pendant drop: containerless liquid for μs-resolved, AI-executable XPCS

Ozgulbas,

Jensen,

Butler

et al. 2023

Light Sci Appl

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The dynamics and structure of mixed phases in a complex fluid can significantly impact its material properties, such as viscoelasticity. Small-angle X-ray Photon Correlation Spectroscopy (SA-XPCS) can probe the spontaneous spatial fluctuations of the mixed phases under various in situ environments over wide spatiotemporal ranges (10−6–103 s /10−10–10−6 m). Tailored material design, however, requires searching through a massive number of sample compositions and experimental parameters, which is beyond the bandwidth of the current coherent X-ray beamline. Using 3.7-μs-resolved XPCS synchronized with the clock frequency at the Advanced Photon Source, we demonstrated the consistency between the Brownian dynamics of ~100 nm diameter colloidal silica nanoparticles measured from an enclosed pendant drop and a sealed capillary. The electronic pipette can also be mounted on a robotic arm to access different stock solutions and create complex fluids with highly-repeatable and precisely controlled composition profiles. This closed-loop, AI-executable protocol is applicable to light scattering techniques regardless of the light wavelength and optical coherence, and is a first step towards high-throughput, autonomous material discovery.

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Section: Introductionmentioning

confidence: 99%

Robotic pendant drop: containerless liquid for μs-resolved, AI-executable XPCS

Ozgulbas,

Jensen,

Butler

et al. 2023

Light Sci Appl

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“…The magnet arrangement of APPLE-Knot undulator is originated from APPLE-II arrangement and a Knot arrangement have been added as an overlay [3]], an APPLE array and a Knot array has been mixed as one array in four-row APPLE-Knot undulator [2,7], but the arrangement can be divided into four parts in one period (as figure 5 shows) based on their contribution for the first field integrals on the central axis (the axis of electron motion), details will be explained later, so the six neighboring magnet blocks can be merged to one holder, as figure 6 shows. The holder is located by a groove and a step, then the holder is locked to aluminum girder by four vertical bolts.…”

Section: Mechanical Designmentioning

confidence: 99%

“…Therefore, the key points of APPLE-Knot mechanical design should mainly focus on reducing the deformation of frame, girder and magnet holder. Field error analysis on four-row APPLE-Knot undulator demonstrates that the magnetization orientation of magnets affects the field error worst [2], but the magnetization orientation error has been set within 1°after taking the technological limitation into account [7]. High priority also should be gave to integral field shimming method design.…”

Section: Introductionmentioning

confidence: 99%

Four-row APPLE-Knot undulator mechanical design and test piece studies for High Energy Photon Source

Huang¹,

Yang²,

Li³

et al. 2022

J. Inst.

Self Cite

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A four-row APPLE-Knot undulator is under developing in the High Energy Photon Source to get polarization adjustable synchrotron radiation and reduce on-axis heat load, because of the exotic magnetic field design, its construction faces challenges in mechanical design of frame, magnet blocks holder and integral field shimming method. In this paper, a mechanical design for APPLE-Knot undulator has been posed and structural deformation has been analysed, a test piece has been manufactured to test the physical design as well as magnetic holder design, integral field shimming method has also been described and realized, the result presents a good repeatability. It's a practical design of four-row APPLE-Knot undulator for the High Energy Photon Source.

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“…The goal of the HEPS project [2] is to build a high-performance high-energy synchrotron light source with 6 GeV beam energy, 200 mA beam current, and the horizontal natural emittance lower The latest baseline designs (labeled as V3.0) of the LINAC [4], the booster [5], the beam transfer lines [6], and the storage ring [7] were given in 2020. Based on these baseline lattices, the designs and optimizations of many types of hardware (see, e.g., [8][9][10][11][12]) and detailed physics studies [3,[13][14][15][16][17][18][19][20] were carried out and basically finished.…”

Section: Introductionmentioning

confidence: 99%

Equilibrium electron beam parameters of the High Energy Photon Source

Meng

Peng

et al. 2023

Radiat Detect Technol Methods

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Purpose The physics design of the High Energy Photon Source (HEPS) was finished after many times of iteration. Hereby, the typical equilibrium electron beam parameters corresponding to the proposed two baseline operation modes in the baseline design of HEPS are presented. Methods To compute the equilibrium parameters of the electron beam, the lattice parameters, RF parameters, and the parameters of the insertion devices (IDs) were determined first. Furthermore, it is more precise to use the full-current electron beam parameters in the estimations of the performance of the synchrotron light. Therefore, not only the single-particle dynamics but also the current-dependent collective effects need to be considered in the computations of the full-current, equilibrium parameters of the electron beam. Both analytic computations and multi-particle tracking simulations were carried out. Results The full-current, equilibrium parameters of the electron beams in the HEPS storage ring are presented in this paper. Moreover, the main beam parameters in the injector (the booster and the LINAC), corresponding to the two baseline operation modes of the storage ring, are also presented. Conclusion The typical electron beam parameters corresponding to the two baseline operation modes are given in detail in this paper.

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Physical design of a cryogenic delta–knot undulator for the High Energy Photon Source

Cited by 6 publications

References 14 publications

Robotic pendant drop: containerless liquid for μs-resolved, AI-executable XPCS

Robotic pendant drop: containerless liquid for μs-resolved, AI-executable XPCS

Four-row APPLE-Knot undulator mechanical design and test piece studies for High Energy Photon Source

Equilibrium electron beam parameters of the High Energy Photon Source

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