Laser wakefield accelerator based light sources: potential applications and requirements

Albert, F.; Thomas, Alexander; Mangles, S. P. D.; Banerjee, Sudeep; Corde, S.; Flacco, Alessandro; Litos, M.; Neely, D.; Vieira, Jorge; Najmudin, Z.; Bingham, R.; Joshi, C.; Katsouleas, T.

doi:10.1088/0741-3335/56/8/084015

Cited by 96 publications

(79 citation statements)

References 122 publications

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“…A high-energy X-ray beam (2-9 MeV) passes through the object being tested. An ideal beam would be monoenergetic, such as produced by a laser Compton light source, as it greatly simplifies the proof of information security (12). In this paper, we simulate a bremsstrahlung X-ray source producing a wide continuum of photon energies, which is a more practical and affordable alternative, but one that requires the imposition of additional constraints to ensure information security.…”

Section: Measurementmentioning

confidence: 99%

Physical cryptographic verification of nuclear warheads

Kemp

Danagoulian

Macdonald

2016

Proc. Natl. Acad. Sci. U.S.A.

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How does one prove a claim about a highly sensitive object such as a nuclear weapon without revealing information about the object? This paradox has challenged nuclear arms control for more than five decades. We present a mechanism in the form of an interactive proof system that can validate the structure and composition of an object, such as a nuclear warhead, to arbitrary precision without revealing either its structure or composition. We introduce a tomographic method that simultaneously resolves both the geometric and isotopic makeup of an object. We also introduce a method of protecting information using a provably secure cryptographic hash that does not rely on electronics or software. These techniques, when combined with a suitable protocol, constitute an interactive proof system that could reject hoax items and clear authentic warheads with excellent sensitivity in reasonably short measurement times.isotopic tomography | nuclear weapons | disarmament | verification

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Section: Measurementmentioning

confidence: 99%

Physical cryptographic verification of nuclear warheads

Kemp

Danagoulian

Macdonald

2016

Proc. Natl. Acad. Sci. U.S.A.

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“…Other shapes could find uses, such as fields with locally high gradients but without a large peak-minimising nonlinear effects, or fields with pronounced peaks and low amplitude elsewhere to improve signal to noise ratios. In particular, we are interested in accelerator applications where the field profile might be used for electron bunch shaping, or as part of a laser wakefield accelerator [11,12]. This requires us to improve on our initial idealised simulations and incorporate experimental features such as more realistic material choices and a supporting waveguide systems.…”

Section: Introductionmentioning

confidence: 99%

Mode Profile Shaping in Wire Media: Towards An Experimental Verification

et al. 2018

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Abstract:We show that an experimentally plausible system consisting of a modulated dielectric wire medium hosted in a metal cavity or waveguide can be used to shape the longitudinal field profile. In addition, a more realistic permittivity is used. These new frequency domain numerical results are a significant step towards justifying the construction of an experimental apparatus to test the field profile shaping in practise.

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“…Its unique qualities make it an ideal probe for active time resolved diagnostics of ultrafast processes in mid-Z elements [3]. It could be used for x-ray absorption spectroscopy, most likely for observation of absorption lines to infer the ionization degree and temperature, or for the x-ray absorption near-edge spectroscopy (XANES) measurement to investigate the electronic density of states and therefore ionic correlation and structure of the matter [4].…”

Section: Introductionmentioning

confidence: 99%

Highly efficient angularly resolving x-ray spectrometer optimized for absorption measurements with collimated sources

Šmíd

González

Ekerfelt

et al. 2017

Review of Scientific Instruments

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Highly collimated betatron radiation from a laser wakefield accelerator is a promising tool for spectroscopic measurements. Therefore there is a requirement to create spectrometers suited to the unique properties of such a source. We demonstrate a spectrometer which achieves an energy resolution of <5 eV at 9 keV (E/∆E > 1800) and is angularly resolving the x-ray emission allowing the reference and spectrum to be recorded at the same time. The single photon analysis is used to significantly reduce the background noise. Theoretical performance of various configurations of the spectrometer is calculated by a ray-tracing algorithm. The properties and performance of the spectrometer including the angular and spectral resolution are demonstrated experimentally on absorption above the K-edge of a Cu foil backlit by laser-produced betatron radiation x-ray beam.

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Laser wakefield accelerator based light sources: potential applications and requirements

Cited by 96 publications

References 122 publications

Physical cryptographic verification of nuclear warheads

Physical cryptographic verification of nuclear warheads

Mode Profile Shaping in Wire Media: Towards An Experimental Verification

Highly efficient angularly resolving x-ray spectrometer optimized for absorption measurements with collimated sources

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