MEDSI2018 - List of Authors (Fliegauf, R.)

Paper

Title

Page

A Compact and Calibratable von Hamos X-Ray Spectrometer Based on Two Full-Cylinder HAPG Mosaic Crystals for High-Resolution XES

189

I. Holfelder, B. Beckhoff, R. Fliegauf, Y. Kayser, M. Müller, M. Wansleben, J. Weser
PTB, Berlin, Germany

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 applied. A novel calibratable von Hamos X-ray spectrometer based on up to two full-cylinder optics was developed at the PTB. To realize the full-cylinder geometry Highly Annealed Pyrolytic Graphite (HAPG) [1] was used. Besides its good bending properties this mosaic crystal shows highly integrated reflectivity while offering low mosaicity ensuring high resolving power [2]. The spectrometer enables chemical speciation of elements in an energy range from 2.4 keV up to 18 keV. The design and commissioning of the spectrometer will be presented together with first results using synchrotron radiation as excitation source. The spectrometer combines high efficiency with high spectral resolution (ten times better than in commercial WDS systems) in a compact arrangement also suitable for laboratory arrangements.
[1] H. Legall et al. (2006). Proc. FEL, BESSY FRAAU04, 798-801
[2] M. Gerlach et al. (2015). J. Appl. Cryst. 48, 2015, 1381-1390

Slides WEOPMA06 [7.630 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEOPMA06

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THPH30

Instrumentation for Source-based Calibration of Space Instruments using Synchrotron Radiation at the Metrology Light Source (MLS)

J. Lubeck, R. Fliegauf, R. Klein, S. Kroth, P. Paustian, M. Richter, R. Thornagel
PTB, Berlin, Germany

PTB has been involved in the calibration of many space-based instruments which often require a calibration for the absolute measurement of radiometric quantities. Based on SR, PTB can perform these absolute measurements traceable to the primary national standards. Over the past decades, PTB has performed calibrations for numerous space missions within scientific co-operations and has become an important partner [1]. Dedicated instrumentation in the PTB laboratory at the MLS has been set up for that purpose: A facility for the calibration of radiation transfer sources in the 7 nm to 400 nm spectral range [2], traceable to the MLS as primary SR source standard, is in operation. Also an existing VUV transfer calibration source [3] was upgraded to cover the extended spectral range from 16 nm to 350 nm. Moreover, a large vacuum vessel is available at the MLS, which allows the handling of complete space instruments, opening up the way for calibration of space instruments directly to the primary source standard MLS. By choosing an appropriate electron beam current or electron beam energy, the spectral radiant intensity and spectral shape can be adjusted to best suit the calibration task.
[1] R. Klein et al., J. Astron. Telesc. Instrum. Syst. 2(4), 044002 (2016).
[2] R. Thornagel et al., Rev. Sci. Instrum. 86, 013106, (2015).
[3] J. Hollandt et al., Metrologia 30, 381 (1993).

Poster THPH30 [3.700 MB]

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Paper	Title	Page
WEOPMA06	A Compact and Calibratable von Hamos X-Ray Spectrometer Based on Two Full-Cylinder HAPG Mosaic Crystals for High-Resolution XES	189
	I. Holfelder, B. Beckhoff, R. Fliegauf, Y. Kayser, M. Müller, M. Wansleben, J. Weser PTB, Berlin, Germany
	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 applied. A novel calibratable von Hamos X-ray spectrometer based on up to two full-cylinder optics was developed at the PTB. To realize the full-cylinder geometry Highly Annealed Pyrolytic Graphite (HAPG) [1] was used. Besides its good bending properties this mosaic crystal shows highly integrated reflectivity while offering low mosaicity ensuring high resolving power [2]. The spectrometer enables chemical speciation of elements in an energy range from 2.4 keV up to 18 keV. The design and commissioning of the spectrometer will be presented together with first results using synchrotron radiation as excitation source. The spectrometer combines high efficiency with high spectral resolution (ten times better than in commercial WDS systems) in a compact arrangement also suitable for laboratory arrangements. [1] H. Legall et al. (2006). Proc. FEL, BESSY FRAAU04, 798-801 [2] M. Gerlach et al. (2015). J. Appl. Cryst. 48, 2015, 1381-1390
	Slides WEOPMA06 [7.630 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEOPMA06
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPH30	Instrumentation for Source-based Calibration of Space Instruments using Synchrotron Radiation at the Metrology Light Source (MLS)
	J. Lubeck, R. Fliegauf, R. Klein, S. Kroth, P. Paustian, M. Richter, R. Thornagel PTB, Berlin, Germany
	PTB has been involved in the calibration of many space-based instruments which often require a calibration for the absolute measurement of radiometric quantities. Based on SR, PTB can perform these absolute measurements traceable to the primary national standards. Over the past decades, PTB has performed calibrations for numerous space missions within scientific co-operations and has become an important partner [1]. Dedicated instrumentation in the PTB laboratory at the MLS has been set up for that purpose: A facility for the calibration of radiation transfer sources in the 7 nm to 400 nm spectral range [2], traceable to the MLS as primary SR source standard, is in operation. Also an existing VUV transfer calibration source [3] was upgraded to cover the extended spectral range from 16 nm to 350 nm. Moreover, a large vacuum vessel is available at the MLS, which allows the handling of complete space instruments, opening up the way for calibration of space instruments directly to the primary source standard MLS. By choosing an appropriate electron beam current or electron beam energy, the spectral radiant intensity and spectral shape can be adjusted to best suit the calibration task. [1] R. Klein et al., J. Astron. Telesc. Instrum. Syst. 2(4), 044002 (2016). [2] R. Thornagel et al., Rev. Sci. Instrum. 86, 013106, (2015). [3] J. Hollandt et al., Metrologia 30, 381 (1993).
	Poster THPH30 [3.700 MB]
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)