Transition between Instability and Seeded Self-Modulation of a Relativistic Particle Bunch in Plasma

Batsch, F.; Muggli, P.; Agnello, R.; Ahdida, C.; Goncalves, M. C. Amoedo; Andrèbe, Y.; Apsimon, O.; Apsimon, R.; Bachmann, A.-M.; Baistrukov, M. A.; Blanchard, P.; Braunmüller, F.; Burrows, Philip; Buttenschön, B.; Caldwell, A.; Chappell, J.; Chevallay, E.; Chung, М.; Cooke, D.; Damerau, Heiko; Davut, C.; Demeter, G.; Deubner, H. Lars; Doebert, S.; Farmer, John; Fasoli, A.; Fedosseev, V. N.; Fiorito, R.; Fonseca, Ricardo; Friebel, Florence; Furno, I.; Garolfi, Luca; Gessner, Spencer; Gorgisyan, Ishkhan; Gorn, A. A.; Granetzny, M.; Graubner, Tim; Grulke, O.; Gschwendtner, Edda; Hafych, Vasyl; Helm, Anton; Henderson, J. R.; Hüther, M.; Kargapolov, I. Yu.; Kraus, Florian; Krupa, Michal; Lefèvre, T.; Liang, Linbo; Liu, S.; Lopes, Nelson; Lotov, K. V.; Martyanov, M.; Mazzoni, Stefano; Godoy, D. Medina; Minakov, V. A.; Moody, J. T.; Moon, K.; Guzmán, P. I. Morales; Moreira, M.; Nechaeva, Tatiana; Nowak, E.; Pakuza, C.; Panuganti, H.; Pardons, A.; Perera, A.; Pucek, J.; Pukhov, A.; Ramjiawan, Rebecca; Rey, S.; Rieger, K.; Schmitz, O.; Senes, Eugenio; Silva, L. O.; Speroni, R.; Spitsyn, R. I.; Stollberg, Christine; Sublet, A.; Topaloudis, Athanasios; Torrado, N.; Tuev, P. V.; Turner, M.; Velotti, Francesco; Verra, L.; Verzilov, V.; Vieira, Jorge; Vincke, Helmut; Welsch, Carsten; Wendt, M.; Wing, M.; Wiwattananon, Peerawan; Wolfenden, Joseph; Woolley, Benjamin; Xia, Guoxing; Zepp, M.; Porta, G. Zevi Della

doi:10.1103/physrevlett.126.164802

Cited by 19 publications

(28 citation statements)

References 30 publications

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“…The fact that these stitched images form long trains of microbunches (see Fig. 1 (a,c,e)) as opposed to a blur, confirms that the SM process is in the seeded [13] and not in the instability regime [4].…”

Section: Experimental Parameters and Diagnosticsmentioning

confidence: 52%

“…The SM process is seeded, in the experiment by a relativistic ionization front (RIF) [11][12][13], and in simulations by a step in the density profile of the proton bunch at the same position along the bunch as that of the RIF. Here, the two seeding methods are considered to be equivalent.…”

Section: General Setupmentioning

confidence: 99%

“…It creates a RIF much shorter than the period of the wakefields (> 8 ps). The interaction of the bunch and the plasma starts suddenly at the RIF, which provides seed wakefields for the SM to grow from [12,13]. When seeded, the phase of the bunch modulation with respect to the RIF is reproducible, from event to event, within a small fraction of a modulation period [13].…”

Section: Experimental Parameters and Diagnosticsmentioning

confidence: 99%

See 2 more Smart Citations

Simulation and experimental study of proton bunch self-modulation in plasma with linear density gradients

Guzmán¹,

Muggli²,

Agnello³

et al. 2021

Phys. Rev. Accel. Beams

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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 in [1]: 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.

show abstract

Section: Experimental Parameters and Diagnosticsmentioning

confidence: 52%

Section: General Setupmentioning

confidence: 99%

Section: Experimental Parameters and Diagnosticsmentioning

confidence: 99%

See 1 more Smart Citation

Simulation and experimental study of proton bunch self-modulation in plasma with linear density gradients

Guzmán¹,

Muggli²,

Agnello³

et al. 2021

Phys. Rev. Accel. Beams

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show abstract

“…This process is similar to the proposed use of self-modulation for laser-driven acceleration [12,13], before the widespread availability of ultrashort, ultraintense laser sources. The self-modulation of the proton beam can be seeded in order to control the phase of the accelerating wakefield [14].…”

Section: Introductionmentioning

confidence: 99%

Injection tolerances and self-matching in a quasilinear wakefield accelerator

Farmer¹,

Liang²,

Ramjiawan³

et al. 2022

Preprint

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“…AWAKE uses proton bunches from the CERN Super Proton Synchrotron (SPS) with the en-ergy of 400 GeV to accelerate a witness bunch of electrons in a ten-meter-long rubidium plasma source. The seeded self-modulation mechanism [8,9] is used to divide the long driver bunch into a group of shorter bunches that can resonantly drive wakefields [10,11].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Proton Bunch Parameters in the AWAKE Experiment

Hafych,

Caldwell,

Agnello

et al. 2021

Preprint

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Transition between Instability and Seeded Self-Modulation of a Relativistic Particle Bunch in Plasma

Cited by 19 publications

References 30 publications

Simulation and experimental study of proton bunch self-modulation in plasma with linear density gradients

Simulation and experimental study of proton bunch self-modulation in plasma with linear density gradients

Injection tolerances and self-matching in a quasilinear wakefield accelerator

Analysis of Proton Bunch Parameters in the AWAKE Experiment

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