A dual-PIXE tomography setup for reconstruction of Germanium in ICF target

Guo, Na; Lü, Hongliang; Wang, Q.; Meng, Jing; Gao, Dayuan; Zhang, Y.J.; Liang, Xiaoying; Zhang, W.; Li, J.; Ma, Xu; Shen, H. F.

doi:10.1016/j.nimb.2017.04.041

Cited by 9 publications

(8 citation statements)

References 25 publications

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“…-Increasing data statistics and/or reducing beam time for PIXE, by increasing the detection solid angle, using two X-ray detectors at the same time [3,4]. -Correcting data for X-ray signal attenuation into the sample [3][4][5][6][7]. This attenuation is caused, first, by the variation of ionization cross section, which decreases due to the proton energy decrease into the sample, resulting in a decrease in X-ray production.…”

Section: Introductionmentioning

confidence: 99%

A Geant4 simulation for three-dimensional proton imaging of microscopic samples

Michelet

Yang

et al. 2019

Physica Medica

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In these experiments, the samples are dehydrated for under vacuum analysis. In situ quantification of nanoparticles has been carried out at CENBG in the frame of nanotoxicology studies, on cells and small organisms used as biological models, especially on Caenorhabditis elegans (C. elegans) nematodes. Tomography experiments reveal the distribution of mass density and chemical content (in g.cm-3) within the analyzed volume. These density values are obtained using an inversion algorithm. To investigate the effect of this data reduction process, we defined different numerical phantoms, including a (dehydrated) C. elegans phantom whose geometry and density were derived from experimental data. A Monte Carlo simulation based on the Geant4 toolkit was developed. Using different simulation and reconstruction conditions, we compared the resulting tomographic images to the initial numerical reference phantom. A study of the relative error between the reconstructed and the reference images lead to the result that 20 protons per shot can be considered as an optimal number for 3D STIM imaging. Preliminary results for PIXE tomography are also presented, showing the interest of such numerical phantoms to produce reference data for future studies on X-ray signal attenuation in thick samples.

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Section: Introductionmentioning

confidence: 99%

A Geant4 simulation for three-dimensional proton imaging of microscopic samples

Michelet

Yang

et al. 2019

Physica Medica

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“…PIXE-T consists of collecting the X-rays emitted by the atoms of the object. We designed a numerical phantom of an ICF target according to typical samples analyzed at Fudan University [2,3]. The phantom is a spherical shell with outer radius 196 µm and thickness 25 µm.…”

Section: Numerical Phantommentioning

confidence: 99%

“…2. We chose a configuration similar to the experiments [3]: i) For STIM-T, the detector is placed after the sample, i.e. the angular position of detector is 0° with respect to beam direction, with a half apex angle of 10.2°; ii) For PIXE-T, the detector is placed at 135° with respect to beam direction.…”

Section: Selection Of Simulation Output Datamentioning

confidence: 99%

“…Particle Induced X-ray Emission Tomography (PIXE-T) in combination with Scanning Transmission Ion Microscopy Tomography (STIM-T) has been used to quantitatively produce the elemental concentration and mass density distributions of microscopic samples of a few tens or hundreds of micrometers in size [1]. These techniques have been applied to the three-dimensional (3D) imaging of microscopic inertial confinement fusion (ICF) targets at Fudan University [2][3][4]. The ICF target is a small spherical shell, a few hundred micrometers in diameter, made of a polymer of uniform composition and mass density, doped with a high Z element, such as Ge.…”

Section: Introductionmentioning

confidence: 99%

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Accuracy of three-dimensional proton imaging of an inertial confinement fusion target assessed by Geant4 simulation

Incerti

Beasley

et al. 2023

Nuclear Instruments and Methods in Physics Research Section B:

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“…We should note that this is larger than typical experimental conditions (for instance ± 13° using a Si(Li) spectrometer (e2v Sirius) of 80 mm 2 , placed at 22 mm of the sample [18] -Two X-ray detectors were considered, placed at "typical" (experimental) angles: the first one at 135° from the incident beam, and the second one at 315°. Experimentally, this approach is widely used for "classical" 2D PIXE imaging [24][25][26][27] and also for PIXE tomography [10,28]. In these conditions, 10 6 incident protons per shot were sufficient to produce simulated PIXE projections for the selected slice, for all elements of interest.…”

Section: Scan Of Tomographic Slicesmentioning

confidence: 99%