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Evaluation of the weighted mean X-ray energy for an imaging system via propagation-based phase-contrast imaging
Authors:
Maria
Seifert
(ECAP, Friedrich-Alexander-Universität Erlangen-Nürnberg)
,
Mareike
Weule
(ECAP, Friedrich-Alexander-Universität Erlangen-Nürnberg)
,
Silvia
Cipiccia
(Diamond Light Source)
,
Veronika
Ludwig
(ECAP, Friedrich-Alexander-Universität Erlangen-Nürnberg)
,
Thilo
Michel
(ECAP, Friedrich-Alexander-Universität Erlangen-Nürnberg)
,
Paul
Neumayer
(GSI Helmholtzzentrum für Schwerionenforschung GmbH)
,
Max
Schuster
(ECAP, Friedrich-Alexander-Universität Erlangen-Nürnberg)
,
Andreas
Wolf
(ECAP, Friedrich-Alexander-Universität Erlangen-Nürnberg)
,
Gisela
Anton
(ECAP, Friedrich-Alexander-Universität Erlangen-Nürnberg)
,
Stefan
Funk
(ECAP, Friedrich-Alexander-Universität Erlangen-Nürnberg)
,
Bernhard
Akstaller
(ECAP, Friedrich-Alexander-Universität Erlangen-Nürnberg)
Co-authored by industrial partner:
No
Type:
Journal Paper
Journal:
Journal Of Imaging
, VOL 6
State:
Published (Approved)
Published:
July 2020
Diamond Proposal Number(s):
18540

Abstract: For imaging events of extremely short duration, like shock waves or explosions, it is necessary to be able to image the object with a single-shot exposure. A suitable setup is given by a laser-induced X-ray source such as the one that can be found at GSI (Helmholtzzentrum für Schwerionenforschung GmbH) in Darmstadt (Society for Heavy Ion Research), Germany. There, it is possible to direct a pulse from the high-energy laser Petawatt High Energy Laser for Heavy Ion eXperiments (PHELIX) on a tungsten wire to generate a picosecond polychromatic X-ray pulse, called backlighter. For grating-based single-shot phase-contrast imaging of shock waves or exploding wires, it is important to know the weighted mean energy of the X-ray spectrum for choosing a suitable setup. In propagation-based phase-contrast imaging the knowledge of the weighted mean energy is necessary to be able to reconstruct quantitative phase images of unknown objects. Hence, we developed a method to evaluate the weighted mean energy of the X-ray backlighter spectrum using propagation-based phase-contrast images. In a first step wave-field simulations are performed to verify the results. Furthermore, our evaluation is cross-checked with monochromatic synchrotron measurements with known energy at Diamond Light Source (DLS, Didcot, UK) for proof of concepts.
Journal Keywords: X-ray backlighter spectrum; propagation-based phase-contrast; single-shot X-ray phase-contrast imaging; models and simulations; X-ray generators and sources
Subject Areas:
Physics
Instruments:
I13-1-Coherence
Added On:
13/07/2020 14:16
Documents:
jimaging-06-00063.pdf
Discipline Tags:
Physics
Technical Tags:
Imaging
Tomography