Turner, M;
Adli, E;
Ahuja, A;
Apsimon, O;
Apsimon, R;
Bachmann, A-M;
Marin, MB;
... Xia, G; + view all
(2019)
Experimental Observation of Plasma Wakefield Growth Driven by the Seeded Self-Modulation of a Proton Bunch.
Physical Review Letters
, 122
(5)
, Article 054801. 10.1103/PhysRevLett.122.054801.
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Abstract
We measure the effects of transverse wakefields driven by a relativistic proton bunch in plasma with densities of 2.1 × 10 14 and 7.7 × 10 14 electrons / cm 3 . We show that these wakefields periodically defocus the proton bunch itself, consistently with the development of the seeded self-modulation process. We show that the defocusing increases both along the bunch and along the plasma by using time resolved and time-integrated measurements of the proton bunch transverse distribution. We evaluate the transverse wakefield amplitudes and show that they exceed their seed value ( < 15 MV / m ) and reach over 300 MV / m . All these results confirm the development of the seeded self-modulation process, a necessary condition for external injection of low energy and acceleration of electrons to multi-GeV energy levels.
| Type: | Article |
|---|---|
| Title: | Experimental Observation of Plasma Wakefield Growth Driven by the Seeded Self-Modulation of a Proton Bunch |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.122.054801 |
| Publisher version: | https://doi.org/10.1103/PhysRevLett.122.054801 |
| Language: | English |
| Additional information: | This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
| Keywords: | Science & Technology, Physical Sciences, Physics, Multidisciplinary, Physics, AWAKE, BEAM, ACCELERATION, INSTABILITY, ELECTRONS |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10069006 |
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