Projects per year
Abstract
We report on an indirect and non-invasive method to simultaneously characterise the energy-dependent emittance and source size of ultra-relativistic positron beams generated during the propagation of a laser-wakefield accelerated electron beam through a high-Z converter target. The strong correlation of the geometrical emittance of the positrons with that of the scattered electrons allows the former to be inferred, with high accuracy, from monitoring the latter. The technique has been tested in a proof-of-principle experiment where, for 100 MeV positrons, we infer geometrical emittances and source sizes of the order of 3micron and 150 micron, respectively. This is consistent with the numerically predicted possibility of achieving sub-micron geometrical emittances and micron-scale source sizes at the GeV level.
Original language | English |
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Article number | 055013 |
Number of pages | 7 |
Journal | Plasma Physics and Controlled Fusion |
Volume | 62 |
Issue number | 5 |
Early online date | 10 Mar 2020 |
DOIs | |
Publication status | Published - 20 Apr 2020 |
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Projects
- 2 Active
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R1696CPP: Nanorad - Ultrafast, Nano-Scale Material Response to Radiation and Applications of Ultrafast Radiation Sources
Dromey, B., Borghesi, M., Currell, F., Kar, S., Kohanoff, J., Reville, B., Riley, D., Sarri, G. & Yeung, M.
08/02/2017 → …
Project: Research
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R1652CPP: Laboratory Studies of Neutral and Collimated Electron-positron Beams
Sarri, G., Borghesi, M. & Reville, B.
12/08/2016 → …
Project: Research