Using Quasi-Monoenergetic Photon Sources To Probe Photo-Fission Resonances

Johnson, M. S.; Hall, James M.; McNabb, D. P.; Tuffley, M. J.; Ahmed, M.W.; Stave, S.; Weller, H. R.; Karwowski, H. J.; Thompkins, J

doi:10.1063/1.3586171

Cited by 4 publications

(6 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To penetrate a given target thicknesses using doses approaching the lowest obtainable values, a first shot at each position can be taken with low flux, and the measured transmission used to determine attenuation for further shots at higher flux. Narrow bandwidth sources at the 10% level near 9 MeV, and at similar fluxes, also improve photofission-based interrogation and characterization by suppressing extraneous signals that can be generated with broader bandwidth or higher energy sources [14]. NRF methods, at isotope specific energies near 2 MeV, offer powerful isotope-specific identification for verification of absence of a substance [15], NDA of fuel [5], and the full range of applications.…”

Section: Monoenergetic Photon Applicationsmentioning

confidence: 98%

Compact quasi-monoenergetic photon sources from laser-plasma accelerators for nuclear detection and characterization

Geddes

Rykovanov

Matlis

et al. 2015

Nuclear Instruments and Methods in Physics Research Section B:

View full text Add to dashboard Cite

a b s t r a c tNear-monoenergetic photon sources at MeV energies offer improved sensitivity at greatly reduced dose for active interrogation, and new capabilities in treaty verification, nondestructive assay of spent nuclear fuel and emergency response. Thomson (also referred to as Compton) scattering sources are an established method to produce appropriate photon beams. Applications are however restricted by the size of the required high-energy electron linac, scattering (photon production) system, and shielding for disposal of the high energy electron beam. Laser-plasma accelerators (LPAs) produce GeV electron beams in centimeters, using the plasma wave driven by the radiation pressure of an intense laser. Recent LPA experiments are presented which have greatly improved beam quality and efficiency, rendering them appropriate for compact high-quality photon sources based on Thomson scattering. Designs for MeV photon sources utilizing the unique properties of LPAs are presented. It is shown that control of the scattering laser, including plasma guiding, can increase photon production efficiency. This reduces scattering laser size and/or electron beam current requirements to scale compatible with the LPA. Lastly, the plasma structure can decelerate the electron beam after photon production, reducing the size of shielding required for beam disposal. Together, these techniques provide a path to a compact photon source system.

show abstract

Section: Monoenergetic Photon Applicationsmentioning

confidence: 98%

Compact quasi-monoenergetic photon sources from laser-plasma accelerators for nuclear detection and characterization

Geddes

Rykovanov

Matlis

et al. 2015

Nuclear Instruments and Methods in Physics Research Section B:

View full text Add to dashboard Cite

show abstract

“…From the physical point of view the term ϕ 0 a(ξ) 2 dξ in (12) means that the electron rides the laser wave, so, during the interaction one observes a Doppler red-shifted signal on the detector. Hence, looking at the detected signal, one can say, that the initial pulse is "stretched" during the interaction.…”

Section: Detector Time Stretchingmentioning

confidence: 99%

“…During the last decades scattering of light on high-energy electron beams has become an indispensable tool for generating tunable wide range X-and γ-radiation [1][2][3][4][5][6][7][8]. These Thomson scattering (TS) sources have found applications in spectroscopy [9][10][11][12], medicine [13], ultrafast radiography [14,15], and nuclear nonproliferation [16][17][18]. The conversion of laser photons to γ-radiation occurs as the Doppler upshift of the laser frequency while scattering on electrons with high gamma-factor.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…If the amplitude is slow-varying, one can see the obvious consequence: the scattered pulse will have a chirp due A L (ϕ) is the color-coded surface. Dark line presents the ζ(ϕ) dependence(12). Projection of the surface section by ζ(ϕ) on ζ axis yields A L (ζ).…”

mentioning

confidence: 99%

See 2 more Smart Citations

Temporal laser-pulse-shape effects in nonlinear Thomson scattering

2016

View full text Add to dashboard Cite

The influence of the laser pulse temporal shape on the Nonlinear Thomson Scattering on-axis photon spectrum is analyzed in detail. Using the classical description, analytical expressions for the temporal and spectral structure of the scattered radiation are obtained for the case of symmetric laser pulse shapes. The possibility of reconstructing the incident laser pulse from the scattered spectrum averaged over interference fringes in the case of high peak intensity and symmetric laser pulse shape is discussed.

show abstract

Compact all-optical precision-tunable narrowband hard Compton X-ray source

Brümmer

Bohlen

Grüner

et al. 2022

Sci Rep

View full text Add to dashboard Cite

Readily available bright X-ray beams with narrow bandwidth and tunable energy promise to unlock novel developments in a wide range of applications. Among emerging alternatives to large-scale and costly present-day radiation sources which severely restrict the availability of such beams, compact laser-plasma-accelerator-driven inverse Compton scattering sources show great potential. However, these sources are currently limited to tens of percent bandwidths, unacceptably large for many applications. Here, we show conceptually that using active plasma lenses to tailor the electron bunch-photon interaction, tunable X-ray and gamma beams with percent-level bandwidths can be produced. The central X-ray energy is tunable by varying the focusing strength of the lens, without changing electron bunch properties, allowing for precision-tuning the X-ray beam energy. This method is a key development towards laser-plasma-accelerator-driven narrowband, precision tunable femtosecond photon sources, enabling a paradigm shift and proliferation of compact X-ray applications.

show abstract

Using Quasi-Monoenergetic Photon Sources To Probe Photo-Fission Resonances

Cited by 4 publications

References 2 publications

Compact quasi-monoenergetic photon sources from laser-plasma accelerators for nuclear detection and characterization

Compact quasi-monoenergetic photon sources from laser-plasma accelerators for nuclear detection and characterization

Temporal laser-pulse-shape effects in nonlinear Thomson scattering

Compact all-optical precision-tunable narrowband hard Compton X-ray source

Contact Info

Product

Resources

About