Construction of a spherically bent crystal analyzer through anodic bonding for a non-resonant inelastic X-ray scattering spectrometer

Ketenoğlu, Didem

doi:10.1080/10739149.2021.1910835

Instrumentation Science & Technology

2021

DOI: 10.1080/10739149.2021.1910835

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Construction of a spherically bent crystal analyzer through anodic bonding for a non-resonant inelastic X-ray scattering spectrometer

Didem Ketenoğlu

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2024

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Cited by 2 publications

References 39 publications

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Development of high energy resolution crystal analyzers based on microporous ceramics for resonant inelastic x‐ray scattering program at High Energy Photon Source

Guo,

Diao,

Zhang

et al. 2024

X-Ray Spectrometry

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The spherically bent x‐ray crystal analyzer is one of the key optical elements for performing high energy resolution hard x‐ray spectroscopies based on Rowland circle geometry. To meet the requirements of Resonant Inelastic X‐ray Scattering (RIXS) program at High Energy Photon Source (HEPS), the fourth‐generation high energy synchrotron in Beijing, China, high energy resolution crystal analyzers were fabricated. The fabrication processes of vacuum‐mounted flat‐diced crystal analyzers using home‐designed devices with microporous ceramics are presented. The energy resolution of the vacuum‐mounted crystal analyzers, for measuring Cu K‐edge RIXS, is benchmarked with that of the glued flat‐diced crystal analyzers. Both the gluing and vacuum‐mounting are proven to be reliable techniques for the routine production of spherical bent diced crystal analyzers with energy resolution of tens of meV, and with good focal properties and efficiency. In particular, the vacuum‐mounted technique will be beneficial for the RIXS techniques to target multiple elements of interest.

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Development of high energy resolution crystal analyzers based on microporous ceramics for resonant inelastic x‐ray scattering program at High Energy Photon Source

Guo,

Diao,

Zhang

et al. 2024

X-Ray Spectrometry

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Novel fabrication technique for high-resolution spherical crystal analyzers using a microporous aluminium base

Said¹,

Kim²,

Aran³

et al. 2022

J Synchrotron Rad

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Modern inelastic X-ray spectrometers employ curved, bent and diced analyzers to capture sufficiently large solid angles of radially emitted scattered radiation emanating from the sample. Fabricating these intricate analyzers, especially when a high energy resolution of a few millielectronvolts is required, is very time-consuming, expensive and often a hit-or-miss affair. A novel fabrication technique is introduced, utilizing a concave-spherical, microporous aluminium base to hold an assembly of a thin glass substrate with a diced crystal wafer bonded to it. Under uniform vacuum forces, the glass substrate is drawn into the aluminium base, achieving the desired bending radius, while dicing of the diffracting crystal layer prevents bending strain from being imposed on the individual crystal pixels. This technique eliminates the need for permanently bonding the crystal assembly to the concave lens, offering the opportunity for correcting figure errors, avoiding long-term degradation of the permanent bond, and making both lens and crystal reusable. Process and material costs are thus substantially decreased. Two analyzers, Si(844) and Ge(337) with intrinsic resolutions of 14.6 meV and 36.5 meV, respectively, were produced in this fashion and characterized in resonant inelastic X-ray scattering (RIXS) measurements. The achieved overall energy resolutions for both analyzers were 29.4 meV for Si(844) and 56.6 meV for Ge(337). Although the RIXS technique is veru sensitive to analyzer imperfections, the analyzers were found to be equal, if not superior, in quality to their traditional, permanently bonded counterparts.

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Construction of a spherically bent crystal analyzer through anodic bonding for a non-resonant inelastic X-ray scattering spectrometer

Cited by 2 publications

References 39 publications

Development of high energy resolution crystal analyzers based on microporous ceramics for resonant inelastic x‐ray scattering program at High Energy Photon Source

Development of high energy resolution crystal analyzers based on microporous ceramics for resonant inelastic x‐ray scattering program at High Energy Photon Source

Novel fabrication technique for high-resolution spherical crystal analyzers using a microporous aluminium base

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