Zobrazeno 1 - 10
of 36
pro vyhledávání: '"H. W. Powell"'
Autor:
G G Scott, C M Brenner, V Bagnoud, R J Clarke, B Gonzalez-Izquierdo, J S Green, R I Heathcote, H W Powell, D R Rusby, B Zielbauer, P McKenna, D Neely
Publikováno v:
New Journal of Physics, Vol 19, Iss 4, p 043010 (2017)
It is shown for the first time that the spatial and temporal distribution of laser accelerated protons can be used as a diagnostic of Weibel instability presence and evolution in the rear surface scale lengths of a solid density target. Numerical mod
Externí odkaz:
https://doaj.org/article/0710ec2c88c3473e85e4d202be824000
Proton acceleration enhanced by a plasma jet in expanding foils undergoing relativistic transparency
Autor:
H W Powell, M King, R J Gray, D A MacLellan, B Gonzalez-Izquierdo, L C Stockhausen, G Hicks, N P Dover, D R Rusby, D C Carroll, H Padda, R Torres, S Kar, R J Clarke, I O Musgrave, Z Najmudin, M Borghesi, D Neely, P McKenna
Publikováno v:
New Journal of Physics, Vol 17, Iss 10, p 103033 (2015)
Ion acceleration driven by the interaction of an ultraintense (2 × 10 ^20 W cm ^−2 ) laser pulse with an ultrathin ( $\leqslant 40$ nm) foil target is experimentally and numerically investigated. Protons accelerated by sheath fields and via laser
Externí odkaz:
https://doaj.org/article/67cfc83891514720816cc5109f4b7b53
Autor:
G G Scott, V Bagnoud, C Brabetz, R J Clarke, J S Green, R I Heathcote, H W Powell, B Zielbauer, T D Arber, P McKenna, D Neely
Publikováno v:
New Journal of Physics, Vol 17, Iss 3, p 033027 (2015)
We measure a record 96 ±2.5% specularly reflected energy fraction from an interaction with a plasma mirror (PM) surface preionized by a controlled prepulse and find that the optical quality is dependent on the inter pulse time delay. Simulations sho
Externí odkaz:
https://doaj.org/article/8513f5b705244bf5bbd53058cc926507
Publikováno v:
High Power Laser Science and Engineering
Autor:
R J Gray, D A MacLellan, B Gonzalez-Izquierdo, H W Powell, D C Carroll, C D Murphy, L C Stockhausen, D R Rusby, G G Scott, R Wilson, N Booth, D R Symes, S J Hawkes, R Torres, M Borghesi, D Neely, P McKenna
Publikováno v:
New Journal of Physics, Vol 16, Iss 9, p 093027 (2014)
Asymmetry in the collective dynamics of ponderomotively-driven electrons in the interaction of an ultraintense laser pulse with a relativistically transparent target is demonstrated experimentally. The 2D profile of the beam of accelerated electrons
Externí odkaz:
https://doaj.org/article/d5a400009a2e4f229bd8790655e72168
Autor:
Luca C. Stockhausen, David Neely, Nicholas P. Dover, Satyabrata Kar, Paul McKenna, G. Hicks, Ian Musgrave, Ross Gray, H. W. Powell, H. Padda, R. J. Clarke, Ricardo Torres, M. King, Zulfikar Najmudin, Bruno Izquierdo, Dean Rusby, David Carroll, D. A. MacLellan, Marco Borghesi
Publikováno v:
King, M, Gray, R J, Powell, H W, MacLellana, D A, Gonzalez-Izquierdo, B, Stockhausen, L C, Hicks, G S, Dover, N P, Rusby, D R, Carroll, D C, Padda, H, Torres, R, Kar, S, Clarke, R J, Musgrave, I O, Najmudin, Z, Borghesi, M, Neely, D & McKenna, P 2016, ' Ion acceleration and plasma jet formation in ultra-thin foils undergoing expansion and relativistic transparency ', Nuclear Instruments & Methods in Physics Research-Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, vol. 829, pp. 163-166 . https://doi.org/10.1016/j.nima.2016.02.032
At sufficiently high laser intensities, the rapid heating to relativistic velocities and resulting decompression of plasma electrons in an ultra-thin target foil can result in the target becoming relativistically transparent to the laser light during
Autor:
R. Heathcote, David Neely, Paul McKenna, James Green, H. W. Powell, Dean Rusby, R. J. Clarke, Bernhard Zielbauer, Ceri Brenner, Graeme Scott, Vincent Bagnoud, B Gonzalez Izquierdo
Publikováno v:
New Journal of Physics
New journal of physics 19(4), 043010 (2017). doi:10.1088/1367-2630/aa652c
New journal of physics 19(4), 043010 (2017). doi:10.1088/1367-2630/aa652c
New journal of physics 19(4), 043010 (2017). doi:10.1088/1367-2630/aa652c
It is shown for the first time that the spatial and temporal distribution of laser accelerated protons can be used as a diagnostic of Weibel instability presence and evolu
It is shown for the first time that the spatial and temporal distribution of laser accelerated protons can be used as a diagnostic of Weibel instability presence and evolu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::be54bacd5b527f41bc8f937f7843e97f
https://strathprints.strath.ac.uk/60103/10/Scott_etal_NJOP_2017_Diagnosis_of_Weibel_instability_evolution_in_the_rear_surface.pdf
https://strathprints.strath.ac.uk/60103/10/Scott_etal_NJOP_2017_Diagnosis_of_Weibel_instability_evolution_in_the_rear_surface.pdf
Publikováno v:
Plasma Physics and Controlled Fusion
Due to the complex electron dynamics and multiple ion acceleration mechanisms that can take place in the interaction of an ultra-intense laser pulse with a thin foil, it is possible for multiple charged particle populations to overlap in space with v
Autor:
R. J. Dance, David Neely, C. D. Murphy, D. A. MacLellan, H. W. Powell, James Green, Ross Gray, Robbie Wilson, Luca C. Stockhausen, Graeme Scott, Nicola Booth, M. King, Paul McKenna, David Carroll, N. M. H. Butler, Marco Borghesi, Steve Hawkes, John McCreadie, Bruno Gonzalez-Izquierdo
Publikováno v:
Gonzalez-Izquierdo, B, Gray, R J, King, M, Wilson, R, Dance, R J, Powell, H, MacLellan, D A, McCreadie, J, Butler, N M H, Hawkes, S, Green, J S, Murphy, C D, Stockhausen, L C, Carroll, D C, Booth, N, Scott, G G, Borghesi, M, Neely, D & McKenna, P 2016, ' Influence of laser polarization on collective electron dynamics in ultraintense laser-foil interactions ', High Power Laser Science and Engineering, vol. 4, e33 . https://doi.org/10.1017/hpl.2016.35
High Power Laser Science and Engineering
High Power Laser Science and Engineering
The collective response of electrons in an ultrathin foil target irradiated by an ultraintense ( ${\sim}6\times 10^{20}~\text{W}~\text{cm}^{-2}$ ) laser pulse is investigated experimentally and via 3D particle-in-cell simulations. It is shown that if
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eb1e25fc78eb6416aa7689324eca6388
https://pure.qub.ac.uk/en/publications/influence-of-laser-polarization-on-collective-electron-dynamics-in-ultraintense-laserfoil-interactions(b2285194-4209-4c85-bf2b-bbe625a3f99b).html
https://pure.qub.ac.uk/en/publications/influence-of-laser-polarization-on-collective-electron-dynamics-in-ultraintense-laserfoil-interactions(b2285194-4209-4c85-bf2b-bbe625a3f99b).html
Autor:
D. A. MacLellan, John McCreadie, James Green, C. D. Murphy, Ross Gray, Bruno Gonzalez-Izquierdo, David Neely, Marco Borghesi, Robbie Wilson, Graeme Scott, H. W. Powell, Luca C. Stockhausen, M. King, N. M. H. Butler, Steve Hawkes, David Carroll, R. J. Dance, Paul McKenna, Nicola Booth
Publikováno v:
Gonzalez-Izquierdo, B, King, M, Gray, R J, Wilson, R, Dance, R J, Powell, H, MacLellan, D A, McCreadie, J, Butler, N M H, Hawkes, S, Green, J S, Murphy, C D, Stockhausen, L C, Carroll, D C, Booth, N, Scott, G G, Borghesi, M, Neely, D & McKenna, P 2016, ' Towards optical polarization control of laser-driven proton acceleration in foils undergoing relativistic transparency ', Nature Communications, vol. 7, 12891 . https://doi.org/10.1038/ncomms12891
Nature Communications
Nature Communications, Vol 7, Iss 1, Pp 1-10 (2016)
Nature Communications
Nature Communications, Vol 7, Iss 1, Pp 1-10 (2016)
Control of the collective response of plasma particles to intense laser light is intrinsic to relativistic optics, the development of compact laser-driven particle and radiation sources, as well as investigations of some laboratory astrophysics pheno
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::db44c5266775c607a82b2b30a08d6287
https://pure.qub.ac.uk/en/publications/towards-optical-polarization-control-of-laserdriven-proton-acceleration-in-foils-undergoing-relativistic-transparency(56191295-4a7a-4c0e-86ff-a90525bec790).html
https://pure.qub.ac.uk/en/publications/towards-optical-polarization-control-of-laserdriven-proton-acceleration-in-foils-undergoing-relativistic-transparency(56191295-4a7a-4c0e-86ff-a90525bec790).html