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Methods for extremely sparse-angle proton tomography.

B T Spiers1, R Aboushelbaya1, Q Feng1

  • 1Department of Physics, Atomic and Laser Physics sub-Department, University of Oxford, Clarendon Laboratory, Oxford OX1 3PU, United Kingdom.

Physical Review. E
|November 16, 2021
PubMed
Summary
This summary is machine-generated.

Proton radiography, a diagnostic for plasma magnetic fields, can now be reconstructed in 3D using new tomographic methods. These techniques improve accuracy with limited proton beams, advancing plasma diagnostics.

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Area of Science:

  • Plasma Physics
  • Particle Acceleration
  • Diagnostic Techniques

Background:

  • Proton radiography is a key diagnostic for measuring magnetic field structures in plasmas.
  • Current methods infer path-integrated magnetic field strength, limiting spatial resolution.
  • Laser-plasma interactions often provide limited probe beams for diagnostics.

Purpose of the Study:

  • To introduce tomographic methods for 3D spatial reconstruction of magnetic fields from proton radiography data.
  • To develop advanced reconstruction algorithms for limited probe beam scenarios.
  • To present a novel method for increasing proton beam production in laser-plasma experiments.

Main Methods:

  • Application of tomographic reconstruction algorithms to proton radiography data.
  • Development of two novel techniques to enhance tomographic performance with sparse data.
  • Introduction of a new experimental configuration for generating multiple proton beams from single laser pulses.

Main Results:

  • Demonstration of tomographic methods to overcome path-integrated measurement degeneracy.
  • Improved 3D magnetic field reconstruction accuracy with limited proton beams.
  • A new method for enhanced proton beam generation from laser-target interactions.

Conclusions:

  • Tomographic reconstruction offers a pathway to full 3D magnetic field mapping in plasmas.
  • The proposed techniques significantly enhance diagnostic capabilities in challenging experimental conditions.
  • Advancements in proton beam generation and tomographic analysis promise future breakthroughs in plasma physics research.