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Proton Bunch Self-Modulation in Plasma with Density Gradient

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arxiv 2007.14894 v2 pith:VVNFAA3N submitted 2020-07-29 physics.plasm-ph physics.acc-ph

F. Braunmüller , T. Nechaeva , AWAKE Collboration This is my paper
classification physics.plasm-phphysics.acc-ph
keywords gradientplasmadensityself-modulationbunchdecreaseslinearmodulation
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We study experimentally the effect of linear plasma density gradients on the self-modulation of a 400\,GeV proton bunch. Results show that a positive/negative gradient in/decreases the number of micro-bunches and the relative charge per micro-bunch observed after 10\,m of plasma. The measured modulation frequency also in/decreases. With the largest positive gradient we observe two frequencies in the modulation power spectrum. Results are consistent with changes in wakefields' phase velocity due to plasma density gradient adding to the slow wakefields' phase velocity during self-modulation growth predicted by linear theory.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Numerical simulations of electron acceleration driven by heavy ion beams in plasma with alternating density gradients

    physics.acc-ph 2025-07 conditional novelty 5.0 of 10

    An alternating density gradient profile keeps the witness electron bunch in the accelerating phase of a heavy-ion-driven plasma wakefield, reaching about 1.2 GeV over one meter in simulation.

  2. Numerical investigations of heavy ion driven plasma wakefield acceleration

    physics.acc-ph 2025-06 conditional novelty 4.0 of 10

    Heavy-ion beams, especially a 0.1 mm bismuth bunch at HIAF-like parameters, can excite multi-GV/m plasma wakefields and accelerate electrons to hundreds of MeV in meter-scale plasmas, according to LCODE simulations.

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