Zobrazeno 1 - 10
of 528
pro vyhledávání: '"M Zepf"'
Publikováno v:
New Journal of Physics, Vol 24, Iss 2, p 025003 (2022)
High power short pulse lasers provide a promising route to study the strong field effects of the quantum vacuum, for example by direct photon–photon scattering in the all-optical regime. Theoretical predictions based on realistic laser parameters a
Externí odkaz:
https://doaj.org/article/33aaf911bee9443d8b0395f1c0bd727d
Autor:
F C Salgado, N Cavanagh, M Tamburini, D W Storey, R Beyer, P H Bucksbaum, Z Chen, A Di Piazza, E Gerstmayr, Harsh, E Isele, A R Junghans, C H Keitel, S Kuschel, C F Nielsen, D A Reis, C Roedel, G Sarri, A Seidel, C Schneider, U I Uggerhøj, J Wulff, V Yakimenko, C Zepter, S Meuren, M Zepf
Publikováno v:
New Journal of Physics, Vol 24, Iss 1, p 015002 (2021)
Measuring signatures of strong-field quantum electrodynamics (SF-QED) processes in an intense laser field is an experimental challenge: it requires detectors to be highly sensitive to single electrons and positrons in the presence of the typically ve
Externí odkaz:
https://doaj.org/article/e9daa1bf9f874dbea7544dbb984c6c11
Autor:
F C Salgado, K Grafenstein, A Golub, A Döpp, A Eckey, D Hollatz, C Müller, A Seidel, D Seipt, S Karsch, M Zepf
Publikováno v:
New Journal of Physics, Vol 23, Iss 10, p 105002 (2021)
The interaction of light with the quantum-vacuum is predicted to give rise to some of the most fundamental and exotic processes in modern physics, which remain untested in the laboratory to date. Electron–positron pair production from a pure vacuum
Externí odkaz:
https://doaj.org/article/7bd4189d97da4bb1b5b1e262c188cf8d
Autor:
B Kettle, D Hollatz, E Gerstmayr, G M Samarin, A Alejo, S Astbury, C Baird, S Bohlen, M Campbell, C Colgan, D Dannheim, C Gregory, H Harsh, P Hatfield, J Hinojosa, Y Katzir, J Morton, C D Murphy, A Nurnberg, J Osterhoff, G Pérez-Callejo, K Põder, P P Rajeev, C Roedel, F Roeder, F C Salgado, G Sarri, A Seidel, S Spannagel, C Spindloe, S Steinke, M J V Streeter, A G R Thomas, C Underwood, R Watt, M Zepf, S J Rose, S P D Mangles
Publikováno v:
New Journal of Physics, Vol 23, Iss 11, p 115006 (2021)
We describe a laser–plasma platform for photon–photon collision experiments to measure fundamental quantum electrodynamic processes. As an example we describe using this platform to attempt to observe the linear Breit–Wheeler process. The platf
Externí odkaz:
https://doaj.org/article/cb1933da51bf47e4bac657e324489f90
Publikováno v:
New Journal of Physics, Vol 22, Iss 9, p 093048 (2020)
Multipass high harmonic generation from plasma surfaces is a promising technique to enhance the efficiency of the generation process. In this paper it is shown that there is an optimal distance between two targets where the efficiency is maximized, d
Externí odkaz:
https://doaj.org/article/a9225f3a95764e4480cb33472bbdaa8b
Autor:
M Coughlan, H Donnelly, N Breslin, C Arthur, G Nersisyan, M Yeung, B Villagomez-Bernabe, M Afshari, F Currell, M Zepf, B Dromey
Publikováno v:
New Journal of Physics, Vol 22, Iss 10, p 103023 (2020)
Recently, measurements of few-picosecond (ps, 10 ^−12 s) pulses of laser-driven protons were realised by the observation of transient opacity in SiO _2 . This ultrafast response could be understood by the formation of self-trapped excitonic states
Externí odkaz:
https://doaj.org/article/e2e1e1f3bc4e48d6b1da38fef5406f77
Autor:
W Schumaker, T Liang, R Clarke, J M Cole, G Grittani, S Kuschel, S P D Mangles, Z Najmudin, K Poder, G Sarri, D Symes, A G R Thomas, M Vargas, M Zepf, K Krushelnick
Publikováno v:
New Journal of Physics, Vol 20, Iss 7, p 073008 (2018)
The interaction of high intensity short pulse laser beams with plasmas can accelerate electrons to energies in excess of a GeV. These electron beams can subsequently be used to generate short-lived particles such as positrons, muons, and pions. In re
Externí odkaz:
https://doaj.org/article/b3524daaf3dd420482a39938d7cc2863
Autor:
N P Dover, C A J Palmer, M J V Streeter, H Ahmed, B Albertazzi, M Borghesi, D C Carroll, J Fuchs, R Heathcote, P Hilz, K F Kakolee, S Kar, R Kodama, A Kon, D A MacLellan, P McKenna, S R Nagel, D Neely, M M Notley, M Nakatsutsumi, R Prasad, G Scott, M Tampo, M Zepf, J Schreiber, Z Najmudin
Publikováno v:
New Journal of Physics, Vol 18, Iss 1, p 013038 (2016)
Spectrally-peaked proton beams of high charge ( ${E}_{{\rm{p}}}\approx 8\;{\rm{MeV}}$ , ${\rm{\Delta }}E\approx 4\;{\rm{MeV}}$ , $N\approx 50$ nC ) have been observed from the interaction of an intense laser ( $\gt {10}^{19}$ W cm ^−2 ) with ultrat
Externí odkaz:
https://doaj.org/article/822b47cf4eca462f80435a1ababe1751
Autor:
B Dromey, S Cousens, S Rykovanov, M Yeung, D Jung, D C Gautier, T Dzelzainis, D Kiefer, S Palaniyppan, R Shah, J Schreiber, J C Fernandez, C L S Lewis, M Zepf, B M Hegelich
Publikováno v:
New Journal of Physics, Vol 15, Iss 1, p 015025 (2013)
Relativistic laser plasmas have been shown to provide a robust platform for the generation of bright attosecond pulses via the relativistically oscillating mirror and coherent wake emission mechanisms. Theoretical work, however, has shown an alternat
Externí odkaz:
https://doaj.org/article/4ce1bbd512f249fa879ab13829517729
Autor:
M Yeung, B Dromey, C Rödel, J Bierbach, M Wünsche, G Paulus, T Hahn, D Hemmers, C Stelzmann, G Pretzler, M Zepf
Publikováno v:
New Journal of Physics, Vol 15, Iss 2, p 025042 (2013)
Intense, femtosecond laser interactions with blazed grating targets are studied through experiment and particle-in-cell (PIC) simulations. The high harmonic spectrum produced by the laser is angularly dispersed by the grating leading to near-monochro
Externí odkaz:
https://doaj.org/article/0851c4efd60d43c49523e9b321f3bf9c