High precision X-ray measurements

Session

Graphite Crystals Spectrometers

Oct 17, 2018, 4:30 PM

Aula Salvini (Laboratori Nazionali di Frascati INFN)

Conveners

Graphite Crystals Spectrometers

• Sultan Dabagov (LNF)
• Johann Zmeskal (Stefan Meyer Institute for Subatomic Physics)

19. Development of a graphite Von Hamos spectrometer for hard - Xray XAS applications

Dr Giannantonio Cibin (Diamond Light Source Ltd.)

10/17/18, 4:30 PM

On B18, the Core-XAS beamline at DLS we have developed an emission spectrometer for the collection of high resolution X-ray emission spectra using the Von Hamos configuration. Design considerations, performance and experimental results will be presented.

3. High resolution X-ray spectroscopy with HAPG crystals

Christopher Schlesiger (TU Berlin)

10/17/18, 4:50 PM

Highly Annealed Pyrolytic Graphite (HAPG) was developed around 10 years ago by the Company Optigraph. Soon, first experiments demonstrated its potential for high resolution X-ray spectroscopy, namely X-ray Absorption Spectroscopy (XAS) and X-ray Emission Spectroscopy (XES). Meanwhile, spectrometer for XAS as well as for XES are in operation, which use X-ray tubes as sources and are suitable...

1. A compact and calibratable von Hamos X-Ray Spectrometer based on two full-cylinder HAPG mosaic crystals for high-resolution XES

Dr Ina Holfelder (Physikalisch-Technische Bundesanstalt)

10/17/18, 5:10 PM

In high-resolution X-ray Emission Spectroscopy (XES) crystal-based Wavelength-Dispersive Spectrometers (WDS) are being applied for characterization of nano- and microscaled materials. Thereby the so called von Hamos geometry provides high detection efficiency due to sagittal focusing using cylindrically bent crystals. To maximize the detection efficiency a full-cylinder optic can be...