Zobrazeno 1 - 10
of 75
pro vyhledávání: '"D R Symes"'
Autor:
A Maitrallain, E Brunetti, M J V Streeter, B Kettle, R Spesyvtsev, G Vieux, M Shahzad, B Ersfeld, S R Yoffe, A Kornaszewski, O Finlay, Y Ma, F Albert, N Bourgeois, S J D Dann, N Lemos, S Cipiccia, J M Cole, I G González, L Willingale, A Higginbotham, A E Hussein, M Šmid, K Falk, K Krushelnick, N C Lopes, E Gerstmayr, C Lumsdon, O Lundh, S P D Mangles, Z Najmudin, P P Rajeev, D R Symes, A G R Thomas, D A Jaroszynski
Publikováno v:
New Journal of Physics, Vol 24, Iss 1, p 013017 (2022)
Laser wakefield accelerators commonly produce on-axis, low-divergence, high-energy electron beams. However, a high charge, annular shaped beam can be trapped outside the bubble and accelerated to high energies. Here we present a parametric study on t
Externí odkaz:
https://doaj.org/article/73efba51f7cd478abdc2f40829d178b9
Autor:
C. C. Cobo, C. Arran, N. Bourgeois, L. Calvin, J. Carderelli, N. Cavanagh, C. Colgan, S. J. D. Dann, R. Fitzgarrald, E. Gerstmayr, B. Kettle, E. E. Los, S. P. D. Mangles, P. McKenna, Z. Najmudin, P. P. Rajeev, C. P. Ridgers, G. Sarri, M. J. V. Streeter, D. R. Symes, A. G. R. Thomas, R. Watt, C. D. Murphy
Publikováno v:
Physical Review Accelerators and Beams, Vol 27, Iss 11, p 111301 (2024)
While plasma-based accelerators have the potential to positively impact a broad range of research topics, a route to application will only be possible through improved understanding of their stability. We present experimental results of a laser wakef
Externí odkaz:
https://doaj.org/article/c5fbf5ae788a43acb60e14e5ecd530a7
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:
P A Walker, N Bourgeois, W Rittershofer, J Cowley, N Kajumba, A R Maier, J Wenz, C M Werle, S Karsch, F Grüner, D R Symes, P P Rajeev, S J Hawkes, O Chekhlov, C J Hooker, B Parry, Y Tang, S M Hooker
Publikováno v:
New Journal of Physics, Vol 15, Iss 4, p 045024 (2013)
The generation of GeV-scale electron beams in a gas-filled capillary discharge waveguide with good reproducibility is discussed. Beams of electrons with energies above 900 MeV, and with root-mean-square divergences of 3.5 mrad, are observed for a pla
Externí odkaz:
https://doaj.org/article/867adab766234f15a8084281acab9cbb
Autor:
R. J. Shalloo, S. J. D. Dann, J.-N. Gruse, C. I. D. Underwood, A. F. Antoine, C. Arran, M. Backhouse, C. D. Baird, M. D. Balcazar, N. Bourgeois, J. A. Cardarelli, P. Hatfield, J. Kang, K. Krushelnick, S. P. D. Mangles, C. D. Murphy, N. Lu, J. Osterhoff, K. Põder, P. P. Rajeev, C. P. Ridgers, S. Rozario, M. P. Selwood, A. J. Shahani, D. R. Symes, A. G. R. Thomas, C. Thornton, Z. Najmudin, M. J. V. Streeter
Publikováno v:
Nature Communications, Vol 11, Iss 1, Pp 1-8 (2020)
Laser wakefield accelerators are compact sources of ultra-relativistic electrons which are highly sensitive to many control parameters. Here the authors present an automated machine learning based method for the efficient multi-dimensional optimizati
Externí odkaz:
https://doaj.org/article/52f417d3dae44109aa044364bd1601e2
Autor:
M. J. V. Streeter, Y. Ma, B. Kettle, S. J. D. Dann, E. Gerstmayr, F. Albert, N. Bourgeois, S. Cipiccia, J. M. Cole, I. Gallardo González, A. E. Hussein, D. A. Jaroszynski, K. Falk, K. Krushelnick, N. Lemos, N. C. Lopes, C. Lumsdon, O. Lundh, S. P. D. Mangles, Z. Najmudin, P. P. Rajeev, R. Sandberg, M. Shahzad, M. Smid, R. Spesyvtsev, D. R. Symes, G. Vieux, A. G. R. Thomas
Publikováno v:
Physical Review Accelerators and Beams, Vol 25, Iss 10, p 101302 (2022)
We report on experimental measurements of energy transfer efficiencies in a GeV-class laser wakefield accelerator. Both the transfer of energy from the laser to the plasma wakefield and from the plasma to the accelerated electron beam was diagnosed b
Externí odkaz:
https://doaj.org/article/a4841cb57f2d4a0dafc47d2acbe910f9
Autor:
B. Loughran, M. J. V. Streeter, H. Ahmed, S. Astbury, M. Balcazar, M. Borghesi, N. Bourgeois, C. B. Curry, S. J. D. Dann, S. DiIorio, N. P. Dover, T. Dzelzainis, O. C. Ettlinger, M. Gauthier, L. Giuffrida, G. D. Glenn, S. H. Glenzer, J. S. Green, R. J. Gray, G. S. Hicks, C. Hyland, V. Istokskaia, M. King, D. Margarone, O. McCusker, P. McKenna, Z. Najmudin, C. Parisuaña, P. Parsons, C. Spindloe, D. R. Symes, A. G. R. Thomas, F. Treffert, N. Xu, C. A. J. Palmer
Publikováno v:
Loughran, B, Streeter, M J V, Ahmed, H, Astbury, S, Balcazar, M, Borghesi, M, Bourgeois, N, Curry, C B, Dann, S J D, Diiorio, S, Dover, N P, Dzelzainis, T, Ettlinger, O C, Gauthier, M, Giuffrida, L, Glenn, G D, Glenzer, S H, Green, J S, Gray, R J, Hicks, G S, Hyland, C, Istokskaia, V, King, M, Margarone, D, McCusker, O, McKenna, P, Najmudin, Z, Parisuaña, C, Parsons, P, Spindloe, C, Symes, D R, Thomas, A G R, Treffert, F, Xu, N & Palmer, C A J 2023, ' Automated control and optimization of laser-driven ion acceleration ', High Power Laser Science and Engineering, vol. 11, e35 . https://doi.org/10.1017/hpl.2023.23
The interaction of relativistically intense lasers with opaque targets represents a highly non-linear, multi-dimensional parameter space. This limits the utility of sequential 1D scanning of experimental parameters for the optimization of secondary r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8b89847cd041dd2bde74babf23a5036d
https://pure.qub.ac.uk/en/publications/b3e94f30-81d8-45ec-836d-07b226d27020
https://pure.qub.ac.uk/en/publications/b3e94f30-81d8-45ec-836d-07b226d27020
Autor:
N. Xu, M. J. V. Streeter, O. C. Ettlinger, H. Ahmed, S. Astbury, M. Borghesi, N. Bourgeois, C. B. Curry, S. J. D. Dann, N. P. Dover, T. Dzelzainis, V. Istokskaia, M. Gauthier, L. Giuffrida, G. D. Glenn, S. H. Glenzer, R. J. Gray, J. S. Green, G. S. Hicks, C. Hyland, M. King, B. Loughran, D. Margarone, O. McCusker, P. McKenna, C. Parisuaña, P. Parsons, C. Spindloe, D. R. Symes, F. Treffert, C. A. J. Palmer, Z. Najmudin
Publikováno v:
Xu, N, Streeter, M J V, Ettlinger, O C, Ahmed, H, Astbury, S, Borghesi, M, Bourgeois, N, Curry, C B, Dann, S J D, Dover, N P, Dzelzainis, T, Istokskaia, V, Gauthier, M, Giuffrida, L, Glenn, G D, Glenzer, S H, Gray, R J, Green, J S, Hicks, G S, Hyland, C, King, M, Loughran, B, Margarone, D, McCusker, O, McKenna, P, Parisuaña, C, Parsons, P, Spindloe, C, Symes, D R, Treffert, F, Palmer, C A J & Najmudin, Z 2023, ' Versatile tape-drive target for high-repetition-rate laser-driven proton acceleration ', High Power Laser Science and Engineering, vol. 11, e23 . https://doi.org/10.1017/hpl.2023.27
We present the development and characterization of a high-stability, multi-material, multi-thickness tape-drive target for laser-driven acceleration at repetition rates of up to 100 Hz. The tape surface position was measured to be stable on the sub-m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::58e4184a53f82d292418ccb888d1b3c3
https://pure.qub.ac.uk/en/publications/4964d97b-a6b5-45be-91b9-1dd1b89dcdb8
https://pure.qub.ac.uk/en/publications/4964d97b-a6b5-45be-91b9-1dd1b89dcdb8
Autor:
R. H. H. Scott, C. Thornton, N. Bourgeois, J. Cowley, Wolf Rittershofer, Tobias Kleinwächter, Jens Osterhoff, D. R. Symes, C. Hooker, S. M. Hooker
Publikováno v:
Physical Review Accelerators and Beams, Vol 23, Iss 11, p 111301 (2020)
A novel mechanism for injection, emittance selection, and postacceleration for laser wakefield electron acceleration is identified and described. It is shown that a laser prepulse can create an ionized plasma filament through multiphoton ionization a
Externí odkaz:
https://doaj.org/article/d898a065eeea4d049120768f3bf747d7
Autor:
M. S. Bloom, M. J. V. Streeter, S. Kneip, R. A. Bendoyro, O. Cheklov, J. M. Cole, A. Döpp, C. J. Hooker, J. Holloway, J. Jiang, N. C. Lopes, H. Nakamura, P. A. Norreys, P. P. Rajeev, D. R. Symes, J. Schreiber, J. C. Wood, M. Wing, Z. Najmudin, S. P. D. Mangles
Publikováno v:
Physical Review Accelerators and Beams, Vol 23, Iss 6, p 061301 (2020)
We show that the properties of the electron beam and bright x rays produced by a laser wakefield accelerator can be predicted if the distance over which the laser self-focuses and compresses prior to self-injection is taken into account. A model base
Externí odkaz:
https://doaj.org/article/0af2be0687dd49cdb637910c98cf8668