Compact spectroscopy of keV to MeV X-rays from a laser wakefield accelerator
Abstract We reconstruct spectra of secondary X-rays from a tunable 250–350 MeV laser wakefield electron accelerator from single-shot X-ray depth-energy measurements in a compact (7.5 × 7.5 × 15 cm), modular X-ray calorimeter made of alternating layers of absorbing materials and imaging plates. X-ray...
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Nature Portfolio
2021
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oai:doaj.org-article:eaf60a2fc3cd454c90139f4fc9eaa78d2021-12-02T18:31:29ZCompact spectroscopy of keV to MeV X-rays from a laser wakefield accelerator10.1038/s41598-021-93689-52045-2322https://doaj.org/article/eaf60a2fc3cd454c90139f4fc9eaa78d2021-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-93689-5https://doaj.org/toc/2045-2322Abstract We reconstruct spectra of secondary X-rays from a tunable 250–350 MeV laser wakefield electron accelerator from single-shot X-ray depth-energy measurements in a compact (7.5 × 7.5 × 15 cm), modular X-ray calorimeter made of alternating layers of absorbing materials and imaging plates. X-rays range from few-keV betatron to few-MeV inverse Compton to > 100 MeV bremsstrahlung emission, and are characterized both individually and in mixtures. Geant4 simulations of energy deposition of single-energy X-rays in the stack generate an energy-vs-depth response matrix for a given stack configuration. An iterative reconstruction algorithm based on analytic models of betatron, inverse Compton and bremsstrahlung photon energy distributions then unfolds X-ray spectra, typically within a minute. We discuss uncertainties, limitations and extensions of both measurement and reconstruction methods.A. HannaschA. Laso GarciaM. LaBergeR. ZgadzajA. KöhlerJ. P. Couperus CabadağO. ZariniT. KurzA. FerrariM. MolodtsovaL. NaumannT. E. CowanU. SchrammA. IrmanM. C. DownerNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-16 (2021) |
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DOAJ |
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Medicine R Science Q A. Hannasch A. Laso Garcia M. LaBerge R. Zgadzaj A. Köhler J. P. Couperus Cabadağ O. Zarini T. Kurz A. Ferrari M. Molodtsova L. Naumann T. E. Cowan U. Schramm A. Irman M. C. Downer Compact spectroscopy of keV to MeV X-rays from a laser wakefield accelerator |
| description |
Abstract We reconstruct spectra of secondary X-rays from a tunable 250–350 MeV laser wakefield electron accelerator from single-shot X-ray depth-energy measurements in a compact (7.5 × 7.5 × 15 cm), modular X-ray calorimeter made of alternating layers of absorbing materials and imaging plates. X-rays range from few-keV betatron to few-MeV inverse Compton to > 100 MeV bremsstrahlung emission, and are characterized both individually and in mixtures. Geant4 simulations of energy deposition of single-energy X-rays in the stack generate an energy-vs-depth response matrix for a given stack configuration. An iterative reconstruction algorithm based on analytic models of betatron, inverse Compton and bremsstrahlung photon energy distributions then unfolds X-ray spectra, typically within a minute. We discuss uncertainties, limitations and extensions of both measurement and reconstruction methods. |
| format |
article |
| author |
A. Hannasch A. Laso Garcia M. LaBerge R. Zgadzaj A. Köhler J. P. Couperus Cabadağ O. Zarini T. Kurz A. Ferrari M. Molodtsova L. Naumann T. E. Cowan U. Schramm A. Irman M. C. Downer |
| author_facet |
A. Hannasch A. Laso Garcia M. LaBerge R. Zgadzaj A. Köhler J. P. Couperus Cabadağ O. Zarini T. Kurz A. Ferrari M. Molodtsova L. Naumann T. E. Cowan U. Schramm A. Irman M. C. Downer |
| author_sort |
A. Hannasch |
| title |
Compact spectroscopy of keV to MeV X-rays from a laser wakefield accelerator |
| title_short |
Compact spectroscopy of keV to MeV X-rays from a laser wakefield accelerator |
| title_full |
Compact spectroscopy of keV to MeV X-rays from a laser wakefield accelerator |
| title_fullStr |
Compact spectroscopy of keV to MeV X-rays from a laser wakefield accelerator |
| title_full_unstemmed |
Compact spectroscopy of keV to MeV X-rays from a laser wakefield accelerator |
| title_sort |
compact spectroscopy of kev to mev x-rays from a laser wakefield accelerator |
| publisher |
Nature Portfolio |
| publishDate |
2021 |
| url |
https://doaj.org/article/eaf60a2fc3cd454c90139f4fc9eaa78d |
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