Bent crystal products

Product overview

X-ray diffraction bent crystals are widely used in X-ray absorption fine structure spectroscopy (XAFS) analysis, wavelength-dispersive X-ray fluorescence spectroscopy (WDXRF), monochromatic excitation X-ray fluorescence spectroscopy, double-bent-crystal X-ray fluorescence measurements, as well as in bent-crystal spectrometers and neutron diffraction applications.
Suzhou Pumo Spectrum Co., Ltd. is committed to developing X-ray diffraction bent crystals for high-resolution or high-diffraction-intensity applications. The bent crystal materials employed include graphite, lithium fluoride, germanium, and silicon series tailored for different crystallographic orientations; the fabricated bent crystal configurations encompass multiple design schemes, such as Johann, Johansson, logarithmic spiral, and von Hamos geometries.
Pumo offers customers comprehensive end-to-end services—from bent crystal design and manufacturing to testing—and can also provide one-stop bent crystal solution packages.

The design of bent crystals is based on Bragg’s diffraction law. In other words, when incident X-rays interact with the crystal lattice and satisfy the Bragg diffraction condition, diffraction occurs. By carefully selecting the material, crystal orientation, and shape of the bent crystal, the diffraction effect of X-rays can be precisely utilized to achieve efficient X-ray optical designs. Given that the refractive index of X-rays is close to 1 in most materials, diffraction is one of the few methods capable of altering the propagation direction of X-rays, making bent crystals an important X-ray optical device.
Bent crystals designed in double-curved configuration can realize point-to-point focusing of monochromatic X-rays with minimal aberrations.

Through extensive comparative testing, various bent crystal materials have been studied and their performance characteristics summarized, enabling targeted optimization design solutions for customers.

Various bent crystal configurations are offered, each undergoing thorough testing. Design, production, and integration services for elliptical and Von Hamos configurations are also available.

Synchrotron radiation sources and benchtop XAFS instruments extensively employ spherical or cylindrical bent crystals for atomic-level spectral analysis, achieving resolutions of up to 1eV.
Bent crystals have emerged as a key focus in the development of X-ray fluorescence (XRF) analysis. They not only enable point-to-point focusing of monochromatic characteristic X-rays in tubes with Cr and Ag targets, but also function directly in fluorescence detection and analysis, with detection limits for certain elements approaching those of ICP-OES.At the excitation end of an XRF instrument, bent crystals effectively reduce the Bremsstrahlung background generated by the X-ray tube, thereby enhancing detection performance. At the emission end, they offer excellent bandpass filtering that minimizes the risk of detector saturation and lowers the detection limits for heavy elements to 0.04µg/mL. When applied at both the excitation and emission ends simultaneously, detection limits for some light elements can reach as low as 0.1µg/mL.
Pumo Spectrum provides a complete bent crystal suite that integrates design, manufacturing, and commissioning into a single solution. With only an X-ray tube and detector supplied by the customer, systems can be rapidly deployed. Pumo Spectrum’s dedicated technical support and high-quality service continue to drive the advancement and broader application of bent crystal technology across diverse industries and end users.