Laser-driven x-ray and neutron source development for industrial applications of plasma accelerators
Data(s) |
26/11/2015
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Resumo |
<p>Pulsed beams of energetic x-rays and neutrons from intense laser interactions with solid foils are promising for applications where bright, small emission area sources, capable of multi-modal delivery are ideal. Possible end users of laser-driven multi-modal sources are those requiring advanced non-destructive inspection techniques in industry sectors of high value commerce such as aerospace, nuclear and advanced manufacturing. We report on experimental work that demonstrates multi-modal operation of high power laser-solid interactions for neutron and x-ray beam generation. Measurements and Monte Carlo radiation transport simulations show that neutron yield is increased by a factor ∼2 when a 1 mm copper foil is placed behind a 2 mm lithium foil, compared to using a 2 cm block of lithium only. We explore x-ray generation with a 10 picosecond drive pulse in order to tailor the spectral content for radiography with medium density alloy metals. The impact of using >1 ps pulse duration on laser-accelerated electron beam generation and transport is discussed alongside the optimisation of subsequent bremsstrahlung emission in thin, high atomic number target foils. X-ray spectra are deconvolved from spectrometer measurements and simulation data generated using the GEANT4 Monte Carlo code. We also demonstrate the unique capability of laser-driven x-rays in being able to deliver single pulse high spatial resolution projection imaging of thick metallic objects. Active detector radiographic imaging of industrially relevant sample objects with a 10 ps drive pulse is presented for the first time, demonstrating that features of 200 μm size are resolved when projected at high magnification.</p> |
Formato |
application/pdf |
Identificador |
http://dx.doi.org/10.1088/0741-3335/58/1/014039 http://pure.qub.ac.uk/ws/files/24270796/Laser_driven_x_ray_and_neutron.pdf http://www.scopus.com/inward/record.url?scp=84949883059&partnerID=8YFLogxK |
Idioma(s) |
eng |
Direitos |
info:eu-repo/semantics/openAccess |
Fonte |
Brenner , C M , Mirfayzi , S R , Rusby , D R , Armstrong , C , Alejo , A , Wilson , L A , Clarke , R , Ahmed , H , Butler , N M H , Haddock , D , Higginson , A , McClymont , A , Murphy , C , Notley , M , Oliver , P , Allott , R , Hernandez-Gomez , C , Kar , S , McKenna , P & Neely , D 2015 , ' Laser-driven x-ray and neutron source development for industrial applications of plasma accelerators ' Plasma Physics and Controlled Fusion , vol 58 , 014039 . DOI: 10.1088/0741-3335/58/1/014039 |
Palavras-Chave | #acceleration #applications #laser #plasma #/dk/atira/pure/subjectarea/asjc/3100/3104 #Condensed Matter Physics #/dk/atira/pure/subjectarea/asjc/2100/2104 #Nuclear Energy and Engineering |
Tipo |
article |