Student Seminar - June 2020

Matthew Selwood

Laser-plasma x-ray sources have garnered interest from various communities due to their ability to
generate high photon-energies from a small source size. The passive imaging of high energy x-rays
and neutrons is also a useful diagnostic in laser-driven fusion capsules as well as laboratory
astrophysics experiments which aim to study small samples of transient electron-positron plasmas.
This talk demonstrates a coded aperture with scatter and partial attenuation included, which we have
dubbed a `CASPA'. As well as discussing the well-known increased throughput of coded apertures, we
also show that the decoding algorithm relaxes the need for a thick substrate. We begin to suggest the
possibility of implementing such systems for neutron energy neutrons, on top of the previously
demonstrated simulations for 511 keV photons.

Stuart Morris

Laser-plasma x-ray sources have garnered interest from various communities due to their ability to
generate high photon-energies from a small source size. The passive imaging of high energy x-rays
and neutrons is also a useful diagnostic in laser-driven fusion capsules as well as laboratory
astrophysics experiments which aim to study small samples of transient electron-positron plasmas.
This talk demonstrates a coded aperture with scatter and partial attenuation included, which we have
dubbed a `CASPA'. As well as discussing the well-known increased throughput of coded apertures, we
also show that the decoding algorithm relaxes the need for a thick substrate. We begin to suggest the
possibility of implementing such systems for neutron energy neutrons, on top of the previously
demonstrated simulations for 511 keV photons.

Lena Howlett

Abstract to follow...