A compact high-resolution spectrometer based on a segmented conical crystal analyzer

Abstract

In this work, the design, fabrication, and evaluation of a compact, one-shot spectrometer based on a segmented conically bent crystal analyzer are described. The system is a "one-shot" wavelength dispersive spectrometer, which has a crystal analyzer with an innovative geometry. It reaches an energy resolution of around 8 eV for Mn Kα 1 line, which is at least an order of magnitude better than the commonly used energy dispersive spectrometers for fluorescence, and is comparable to current wavelength dispersive spectrometers. The prototype spectrometer fabricated in this work avoids angle scans that most wavelength dispersive spectrometers require, has the advantage of a sample-detector distance of only 146 mm, and allows for the simultaneous measurement of approximately a 2 keV window. This system is suitable to be used at synchrotron radiation facilities and free electron lasers, and it can even be adapted to an x-ray tube in any conventional x-ray laboratory.

Example telescope simulations with the AstroX telescope toolbox for McXtrace

“…26 Such a model could enable design of experiments and facilities, along the lines of what is being done for beamlines. 27,28 Many other software packages are available to users for telescope calculations, but this coupling is fairly unique. All simulations reported in this paper have been run on a standard desktop computer, and within the timeframe of < 3 min.…”

A high-resolution and high-efficiency x-ray spectrometer based on a multi-cone crystal

“…Recently, Robledo et al developed a new method to fabricate the multi-cone crystal, which they called the segmented conical crystal [21]. After fixing the crystal parameters, the corresponding crystal holder was designed and fabricated with polypropylene by 3D printing.…”

“…Recently, a new multi-cone x-ray imaging Bragg crystal was introduced by arranging the crystal points on many cone surfaces (ideally, an infinite number of cones). The advantages of the multi-cone geometry are as follows: (1) a high collection efficiency with a large solid collection angle to provide fine focal spots; (2) reducing the detector plane which is too costly; (3) rotational symmetry of the ray pattern is guaranteed for each Bragg angle which benefits perfect images; (4) image points fall on a vertical straight line which means a good combination with a streak camera or gated strip detector [19][20][21].…”

Designing a toroidal crystal for monochromatic X-ray imaging of a laser-produced He-like plasma

“…The presently used bent crystal https://doi.org/10.1017/hpl.2022. 25 Published online by Cambridge University Press spectrometers contain spectroscopic crystals with different structures, such as cylindrical [17], spherical [18], conical [19,20], and elliptical crystals [21]. These bent crystals can enhance the focusing characteristics and spectral resolution of the spectrometers.…”

“…To overcome the shortcomings of flat crystal spectrometers, bent crystal spectrometers were developed and extensively investigated [14][15][16] . The presently used bent crystal spectrometers contain spectroscopic crystals with different structures, such as cylindrical [17] , spherical [18] , conical [19,20] and elliptical [21] . These bent crystals can enhance the focusing characteristics and spectral resolution of the spectrometers.…”