Morales Guzmán, PI;
Muggli, P;
Agnello, R;
Ahdida, CC;
Aladi, M;
Amoedo Goncalves, MC;
Andrebe, Y;
... Zevi Della Porta, G; + view all
(2021)
Simulation and experimental study of proton bunch self-modulation in plasma with linear density gradients.
Physical Review Accelerators and Beams
, 24
(10)
, Article 101301. 10.1103/PhysRevAccelBeams.24.101301.
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Abstract
We present numerical simulations and experimental results of the self-modulation of a long proton bunch in a plasma with linear density gradients along the beam path. Simulation results agree with the experimental results reported [F. Braunmller, T. Nechaeva et al. (AWAKE Collaboration), Phys. Rev. Lett. 125, 264801 (2020)PRLTAO0031-900710.1103/PhysRevLett.125.264801]: with negative gradients, the charge of the modulated bunch is lower than with positive gradients. In addition, the bunch modulation frequency varies with gradient. Simulation results show that dephasing of the wakefields with respect to the relativistic protons along the plasma is the main cause for the loss of charge. The study of the modulation frequency reveals details about the evolution of the self-modulation process along the plasma. In particular for negative gradients, the modulation frequency across time-resolved images of the bunch indicates the position along the plasma where protons leave the wakefields. Simulations and experimental results are in excellent agreement.
| Type: | Article |
|---|---|
| Title: | Simulation and experimental study of proton bunch self-modulation in plasma with linear density gradients |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevAccelBeams.24.101301 |
| Publisher version: | https://doi.org/10.1103/PhysRevAccelBeams.24.10130... |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| 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.ucl.ac.uk/id/eprint/10137262 |
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