High resolution multielement XRF spectroscopy of extended and diffused sources with a graphite mosaic crystal based Von Hamos spectrometer

Scordo, A.; Breschi, L.; Curceanu, C.; Miliucci, M.; Sirghi, F.; Zmeskal, J.

doi:10.1039/c9ja00269c

Cited by 12 publications

(25 citation statements)

References 25 publications

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“…The target foil is activated by the X-ray tube and the Kα 1,2 lines, isotropically emitted, are collimated by the slits system to simulate a point-like source. An example of the resulting spectrum, after performing the calibration and fitting procedure reported in our previous work [5], is shown in the Fig. 2.…”

Section: Methodsmentioning

confidence: 99%

“…Figure 2: Copper Bragg spectrum where the overall fitting function (red), the polynomial background (blue) and the Kα 1 (green) and Kα 2 (violet) components are over imposed to the spectrum for ∆θ=0.7 and S 0 =1.1 mm, elaborated from [5] (see text for details).…”

Section: Methodsmentioning

confidence: 99%

“…where the ratio between the beam vertical dimension A c and 8 mm accounts for the difference between the MTYTHEN2 strip height and the XRF beam spot vertical size on the HAPG. A c is evaluated, following the procedure described in [5], from the slits positions and dimensions. The reflection efficiencies, obtained with a ρ = 206.7 mm HAPG crystal for both Cu Kα1,2 F e Kα1,2 XRF lines, from Eq.…”

Section: Methodsmentioning

confidence: 99%

“…This technology is suitable to be used in the Von Hamos configuration combining the standard dispersion of a flat crystal with the focusing properties of cilindrically bent crystals. Several studies aimed to analyze the effect on the energy resolution, of the precision of the mosaicity and thickness of the crystal have been already performed and the capability of the spectrometer to be optimized in order to achieve the best precision has been also demonstrated [4,5]. The performance of the spectrometer has been lately studied in terms of reflection efficiency [6] and in this work we want to focus on the ray-tracing simulations implemented in order to check the agreement with the experimental results.…”

Section: Introductionmentioning

confidence: 99%

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Reflection efficiency and spectra resolutions ray-tracing simulations for the VOXES HAPG crystal based Von Hamos spectrometer

Leo¹,

Scordo²,

Curceanu³

et al. 2021

Preprint

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The VOXES collaboration at INFN National Laboratories of Frascati developed a prototype of a high resolution Von Hamos X-ray spectrometer using HAPG (Highly Annealed Pyrolytic Graphite) mosaic crystals. This technology allows the employment of extended isotropic sources and could find application in several physics fields. The capability of the spectrometer to reach energy precision and resolution below 1 and 10 eV, respectively, when used with wide sources have been already demonstrated. Recently, the response of this device, for a ρ = 206.7 mm cylindrically bent HAPG crystal using CuKα 1,2 and F eKα 1,2 XRF lines, has been investigated in terms of reflection efficiency by a dedicated ray-tracing simulation. Details of the simulation procedure and the comparison with the experimental results are presented. This study is crucial in order to retrieve information on the spectrometer signal collection efficiency, especially in the energy range in which the standard calibration procedures cannot be applied.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Reflection efficiency and spectra resolutions ray-tracing simulations for the VOXES HAPG crystal based Von Hamos spectrometer

Leo¹,

Scordo²,

Curceanu³

et al. 2021

Preprint

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“…1 left and right, respectively. A full and comprehensive description of all the components of the VOXES spectrometer, the definition of the geometrical parameters both in the Bragg and the vertical plane, together with deep investigations of the dependance of the VOXES spectrometer capabilities with respect to the crystal mosaicity, thickness and curvature radius can be found in our previous works [7][8][9]. In particular, in [8] the geometrical configurations in terms of 0 , Δ pairs leading to the best achievable precisions and resolutions for measurements of Fe, Cu, Zn, Mo, Nb transitions can be found; as an example, being the 3,4 3 → 2 transition energies at 6, 2…”

Section: Pos(panic2021)195mentioning

confidence: 99%

HAPG mosaic crystal Von Hamos spectrometer for high precision kaonic atoms spectroscopy

Scordo¹,

Curceanu²,

Leo³

et al. 2022

Proceedings of Particles and Nuclei International Conference 2021 — PoS(PANIC2021)

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Von Hamos (VH) spectrometers are widely used in several fields, ranging from pure physics applications to very different types of practical ones. However, these type of Bragg spectrometers are usally implied in high rate -high resolution experiments, where the typical source size can be as low as few tens of microns. These limitations prevented them to be used as X-ray detectors for high precision exotic atoms spectroscopy, except for cases where extremly high flux beams could be employed, like in the case of pionic atoms at PSI. Recently, we developed a VH spectrometer, within the VOXES collaboration at the INFN Laboratories of Frascati, making use of Highly Annealed Pyrolitic Graphite (HAPG) mosaic crystals and a X-ray beam optics optimization, which could be used for source sizes up to few mm, (in the Bragg plane), some tens of mm in the sagittal plane and, if gaseous sources are used, of several tens of cm in the X-ray propagation direction. Such kind of a spectrometer could be used, for example, to open a new era in the field of exotic (kaonic) atoms precision measurements, delivering data with unprecedented precision to the (strangeness) nuclear physics community. In this paper we present, together with an overall description of the VOXES spectrometer and of its main characteristics in terms of resolution and efficiencies, a comparison between a kaonic helium 3 → 2 transition spectrum measured with Silicon Drift Detectors and ray tracing simulated spectra of how the same transition would appear if measured with our apparatus.

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Trends in particle and nuclei identification techniques in nuclear physics experiments

et al. 2022

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Particle identification techniques are fundamental tools in nuclear physics experiments. Discriminating particles or nuclei produced in nuclear interactions allows to better understand the underlying physics mechanisms. The energy interval of these reactions is very broad, from sub-eV up to TeV. For this reason, many different identification approaches have been developed, often combining two or more observables. This paper reviews several of these techniques with emphasis on the expertise gained within the current nuclear physics scientific program of the Italian Istituto Nazionale di Fisica Nucleare (INFN).

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High resolution multielement XRF spectroscopy of extended and diffused sources with a graphite mosaic crystal based Von Hamos spectrometer

Abstract: High resolution Bragg spectroscopy from millimetric size sources has been performed in 6–20 keV range with the VOXES HAPG spectrometer.

Cited by 12 publications

References 25 publications

Reflection efficiency and spectra resolutions ray-tracing simulations for the VOXES HAPG crystal based Von Hamos spectrometer

Reflection efficiency and spectra resolutions ray-tracing simulations for the VOXES HAPG crystal based Von Hamos spectrometer

HAPG mosaic crystal Von Hamos spectrometer for high precision kaonic atoms spectroscopy

Trends in particle and nuclei identification techniques in nuclear physics experiments

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