Design of x-ray diagnostic beam line for a synchrotron radiation source and measurement results

Garg, Akash; Karnewar, A. K.; Ojha, Anuj Kumar; Shrivastava, Bhasker; Holikatti, A.C.; Puntambekar, T. A.; Navathe, C. P.

doi:10.1016/j.nima.2014.04.013

Cited by 8 publications

(2 citation statements)

References 7 publications

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“…Thanks to their short wavelength, X-rays can greatly improve the imaging resolution to meet small beam size measurements. X-ray pinhole imaging, as a common method, has been applied at Diamond Light Source, European Synchrotron Radiation Facility and so on (Thomas et al, 2010;Garg et al, 2014;Leitenberger et al, 2003). It is characterized by real-time and high measurement accuracy.…”

Section: Introductionmentioning

confidence: 99%

Exploring beam size measurement based on the Talbot effect at BEPCII

Zhang,

Zhu,

Sui

et al. 2023

J Synchrotron Radiat

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Vertical beam size measurements were carried out at Beijing Electron–Positron Collider II (BEPCII) using a phase grating and an absorption grating based on the Talbot effect. The transverse coherence of synchrotron radiation is closely related to beam size. Due to the partial coherence of the synchrotron radiation source, the coherence length can be calculated by measuring the visibility decay of interferograms recorded at different distances behind the gratings. A vertical beam size of 68.19 ± 2 µm was obtained based on the relationship between the coherence length and beam size at the 3W1 beamline of BEPCII. A comparison of the vertical emittance derived from the grating Talbot method and the synchrotron radiation visible light interferometer method was presented. The vertical emittances from the two methods are 1.41 nm rad and 1.40 nm rad, respectively. The 0.1% difference indicates that the grating Talbot method for beam size measurement is reliable. This technique has great potential for small beam size measurement of fourth-generation synchrotron radiation light sources, considering its small diffraction limitation and simple experimental setups.

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Section: Introductionmentioning

confidence: 99%

Exploring beam size measurement based on the Talbot effect at BEPCII

Zhang,

Zhu,

Sui

et al. 2023

J Synchrotron Radiat

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“…The purpose of utilising such an ultrahigh-precision instrument is to fully realise the benefits of higher brightness and minuscule dimensions of X-ray beams radiating from a light source. To this end, numerous groups [1,2,3,4,5,6,7,8] have developed X-ray detectors of this type to fulfil their own needs over the past decades. In the meantime, the advent of new synchrotronradiation (SR) facilities of this decade [9,10] is sparking a strong need to further increase photodetector's sensitivity to a scale of a fraction of one micron.…”

Section: Introductionmentioning

confidence: 99%

Customisable X-ray fluorescence photodetector with submicron sensitivity using a ring array of silicon p-i-n diodes

Yoon¹

2018

Sci Rep

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The research and development of silicon-based X-ray fluorescence detectors achieved its submicron sensitivity. Its initial use is intended for in-situ beam monitoring at advanced light-source facilities. The effectively functioning prototype fully leveraged technologies and techniques from a wide array of scientific disciplines: X-ray fluorescence technique, photon scattering and spectroscopy, astronomical photometry, semiconductor physics, materials science, microelectronics, analytical and numerical modelling, and high-performance computing. At the design stage, the systematic two-track approach was taken with the aim of attaining its submicron sensitivity: Firstly, the novel parametric method, devised for system-wide full optimisation, led to a considerable increase in detector’s total solid angle (0.9 steradian), or integrated field-of-view (~3000 deg2), thus, in turn, yielding a substantial enhancement of its photon-detection efficiency. Secondly, the minimisation of all types of limiting noise sources identified resulted in a boost to detector’s signal-to-noise ratio, thereby achieving its targeted range of sensitivity. The subsequent synchrotron-radiation experiment with this X-ray detector demonstrated its capability to respond to 8-keV photon beams with 600-nanometre sensitivity. This Article reports on the innovative and effective design methods, formulated for systematising the process of custom-building ultrasensitive photodetectors, and future directions.

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