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1.	Nechaeva, T., et al. (author) Hosing of a Long Relativistic Particle Bunch in Plasma 2024 In: Physical Review Letters. - : American Physical Society. - 0031-9007 .- 1079-7114. ; 132:7 Journal article (peer-reviewed)abstract Experimental results show that hosing of a long particle bunch in plasma can be induced by wakefields driven by a short, misaligned preceding bunch. Hosing develops in the plane of misalignment, selfmodulation in the perpendicular plane, at frequencies close to the plasma electron frequency, and are reproducible. Development of hosing depends on misalignment direction, its growth on misalignment extent and on proton bunch charge. Results have the main characteristics of a theoretical model, are relevant to other plasma -based accelerators and represent the first characterization of hosing.
2.	Verra, L., et al. (author) Filamentation of a relativistic proton bunch in plasma 2024 In: Physical review. E. - : American Physical Society. - 2470-0045 .- 2470-0053. ; 109:5 Journal article (peer-reviewed)abstract We show in experiments that a long, underdense, relativistic proton bunch propagating in plasma undergoes the oblique instability, which we observe as filamentation. We determine a threshold value for the ratio between the bunch transverse size and plasma skin depth for the instability to occur. At the threshold, the outcome of the experiment alternates between filamentation and self-modulation instability (evidenced by longitudinal modulation into microbunches). Time-resolved images of the bunch density distribution reveal that filamentation grows to an observable level late along the bunch, confirming the spatiotemporal nature of the instability. We provide a rough estimate of the amplitude of the magnetic field generated in the plasma by the instability and show that the associated magnetic energy increases with plasma density.

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Type of publication: journal article (2)

Type of content: peer-reviewed (2)

Author/Editor: Henderson, J. (2); della Porta, G. Zevi (2); Liu, S. (2); Caldwell, A. (2); Wing, M. (2); Apsimon, R. (2); show more...; Blanchard, P (2); Fasoli, A (2); Schmitz, O (2); Pukhov, A. (2); Silva, L. (2); Chung, M. (2); Turner, M. (2); Farmer, J. (2); Pepitone, Kevin, Dr, ... (2); Granados, E. (2); Wendt, M (2); Rey, S. (2); Lefevre, T. (2); Andrebe, Y. (2); Furno, I. (2); Silva, F (2); Doebert, S. (2); Fonseca, R (2); Liang, L (2); Grulke, O (2); Moon, K (2); Dexter, A. C. (2); Mazzoni, S. (2); Vieira, J. (2); Welsch, C. (2); Xia, G. (2); Velotti, F (2); Saberi, H (2); Nechaeva, T. (2); Verra, L. (2); Pucek, J. (2); Ranc, L. (2); Bergamaschi, M. (2); Muggli, P. (2); Agnello, R. (2); Ahdida, C. C. (2); Amoedo, C. (2); Apsimon, O. (2); Arnesano, J. M. (2); Bencini, V. (2); Burrows, P. N. (2); Buttenschoen, B. (2); Cooke, D. A. (2); Davut, C. (2); show less...

University: Uppsala University (2)

Language: English (2)

Research subject (UKÄ/SCB): Natural sciences (2)

Year: 2024 (2)Undo refine

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