Escaping electrons from intense laser-solid interactions as a function of laser spot size
Rusby, Dean and Gray, Ross and Butler, Nicholas and Dance, Rachel and Scott, Graeme and Bagnoud, Vincent and Zielbauer, Bernhard and McKenna, Paul and Neely, David (2018) Escaping electrons from intense laser-solid interactions as a function of laser spot size. EPJ Web of Conferences, 167. pp. 1-5. 02001. ISSN 2100-014X (https://doi.org/10.1051/epjconf/201816702001)
Preview |
Text.
Filename: Rusby_etal_EPJWC2018_Escaping_electrons_from_intense_laser_solid_interactions_as_a_function.pdf
Final Published Version License: Download (900kB)| Preview |
Abstract
The interaction of a high-intensity laser with a solid target produces an energetic distribution of electrons that pass into the target. These electrons reach the rear surface of the target creating strong electric potentials that act to restrict the further escape of additional electrons. The measurement of the angle, flux and spectra of the electrons that do escape gives insights to the initial interaction. Here, the escaping electrons have been measured using a differentially filtered image plate stack, from interactions with intensities from mid 1020-1017 W/cm2, where the intensity has been reduced by defocussing to increase the size of the focal spot. An increase in electron flux is initially observed as the intensity is reduced from 4x1020 to 6x1018 W/cm2. The temperature of the electron distribution is also measured and found to be relatively constant. 2D particle-in-cell modelling is used to demonstrate the importance of pre-plasma conditions in understanding these observations.
-
-
Item type: Article ID code: 62941 Dates: DateEvent9 January 2018Published16 November 2017AcceptedSubjects: Science > Physics Department: Strategic Research Themes > Measurement Science and Enabling Technologies
Faculty of Science > PhysicsDepositing user: Pure Administrator Date deposited: 18 Jan 2018 14:53 Last modified: 24 Aug 2024 14:46 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/62941