Towards Proton Tomography of Laser-Plasma Interactions

ORAL

Abstract

Proton radiography, similarly to many diagnostics, probes a plasma in a line-integrated fashion.

Analytical techniques for proton radiographs have advanced significantly in recent years and reliable

recovery of integrated deflections is now possible, along with separation of the electric and magnetic

fields’ contributions to those deflections. Here, we propose the application of tomographic methods

to the proton radiography diagnostic and present two pre-processing stages which vastly improve

the performance of standard tomographic algorithms in the limit of very few probe directions and

highly elongated field structures respectively. These methods improve the practical applicability of

common tomographic algorithms to proton radiography and therefore the feasibility of deducing

three-dimensional magnetic field structures in plasma.

*This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014-2018 and 2019-2020 under grant agreement No 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission.

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Publication: https://arxiv.org/abs/2103.11266 "Methods for Extremely Sparse-Angle Proton Tomography"

Presenters

  • Ben T Spiers

    • University of Oxford
    • Department of Physics, Atomic and Laser Physics sub-Department, University of Oxford, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, United Kingdom

Authors

  • Ben T Spiers

    • University of Oxford
    • Department of Physics, Atomic and Laser Physics sub-Department, University of Oxford, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, United Kingdom

  • Ramy Aboushelbaya

    • University of Oxford
    • Department of Physics, Atomic and Laser Physics sub-Department, University of Oxford, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, United Kingdom

  • Qingsong Feng

    • University of Oxford
    • Department of Physics, Atomic and Laser Physics sub-Department, University of Oxford, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, United Kingdom

  • Marko W Mayr

    • University of Oxford
    • Department of Physics, Atomic and Laser Physics sub-Department, University of Oxford, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, United Kingdom

  • Iustin Ouatu

    • University of Oxford
    • Department of Physics, Atomic and Laser Physics sub-Department, University of Oxford, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, United Kingdom

  • Robert W Paddock

    • University of Oxford
    • Department of Physics, Atomic and Laser Physics sub-Department, University of Oxford, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, United Kingdom

  • Robin Timmis

    • University of Oxford
    • Department of Physics, Atomic and Laser Physics sub-Department, University of Oxford, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, United Kingdom

  • Robin Wang

    • University of Oxford

  • Peter A Norreys

    • Rutherford Appleton Lab
    • Department of Physics, Atomic and Laser Physics sub-Department, University of Oxford, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, United Kingdom; Central Laser Facility