Positron transport and acceleration in beam-driven plasma wakefield accelerators using plasma columns

Diederichs, Severin; Mehrling, Timon; Benedetti, C.; Schroeder, C. B.; Knetsch, A.; Esarey, E.; Osterhoff, Jens

doi:10.1103/physrevaccelbeams.22.081301

Cited by 48 publications

(44 citation statements)

References 28 publications

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“…Besides energy transfer from head-to-tail using long positron beams [18], controlling the wakefield structure is the way to enable simultaneous focusing and acceleration for positrons. It is possible to achieve such advanced control by using shaped drivers [19,20] or plasmas [21][22][23]. For the latter, positron (and electron) acceleration in hollow channels is attractive because of its vanishing transverse focusing fields, which ensures emittance preservation, and enable even higher acceleration efficiencies compared to the nonlinear blowout regime [24][25][26][27].…”

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confidence: 99%

Stable Positron Acceleration in Thin, Warm, Hollow Plasma Channels

et al. 2021

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Hollow plasma channels are attractive for lepton acceleration because they provide intrinsic emittance preservation regimes. However, beam breakup instabilities dominate the dynamics. Here, we show that thin, warm hollow channels can sustain large-amplitude plasma waves ready for high-quality positron acceleration. We verify that the combination of warm electrons and thin hollow channels enables positron focusing structures. Such focusing wakefields unlock beam breakup damping mechanisms. We demonstrate that such channels emerge self-consistently during the long-term plasma dynamics in the blowout's regime aftermath, allowing for experimental demonstration.

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confidence: 99%

Stable Positron Acceleration in Thin, Warm, Hollow Plasma Channels

et al. 2021

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“…Using of plasma in transport channel can make it difficult to transport of the positron bunches. Positron witness bunch transport in PDWA may face the same problems that exist in PWFA studies (see [31][32][33] and references there). Although the first analytical studies have shown the possibility of focusing accelerated positron bunches in PDWA [23,34], a full numerical simulation, taking into account the self-consistent dynamics of the drive electron and accelerated positron bunches, taking into account the group velocity effects [35], have just begun.…”

Section: Introductionmentioning

confidence: 95%

Acceleration and focusing of positron bunch in a dielectric waveguide accelerator with homogeneous plasma in transport channel

Markov,

Kniaziev,

Sotnikov

2021

Preprint

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The paper presents the results of numerical PIC-simulation of positron bunch focusing when acceleration in a plasma dielectric wakefield accelerator. The wakefield was excited by drive electron bunch in quartz dielectric tube, embedded in cylindrical metal waveguide. The internal area of dielectric tube has been filled with radially homogeneous plasma having in general case the vacuum channel along waveguide axis. Results of numerical PIC simulation have shown that it is possible a simultaneous acceleration and focusing of test positron bunch in the wakefield. The dependence of transport and acceleration of positron bunch on size of vacuum channel and waveguide length is studied.

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“…Various methods have * weilu@tsinghua.edu.cn been proposed to address the plasma wakefield e + acceleration problem for a compact e + e − collider. A hollow laser [14] or electron beam [15] driver was proposed for e + acceleration in a uniform plasma, and a finite-width plasma driven by an e − bunch [16,17] was considered for e + acceleration and transport. Recently, multi-GeV acceleration of e + particles has been demonstrated in an e + self-loaded plasma wakefield [18].…”

Section: Introductionmentioning

confidence: 99%

High efficiency uniform positron beam loading in a hollow channel plasma wakefield accelerator

Zhou,

Hua,

et al. 2021

Preprint

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We propose a novel positron beam loading regime in a hollow plasma channel that can efficiently accelerate e + beam with high gradient and narrow energy spread. In this regime, the e + beam coincides with the drive e − beam in time and space and their net current distribution determines the plasma wakefields. By precisely shaping the beam current profile and loading phase according to explicit expressions, three-dimensional Particle-in-Cell (PIC) simulations show that the acceleration for e + beam of ∼nC charge with ∼GV/m gradient, 0.5% induced energy spread and ∼50% energy transfer efficiency can be achieved simultaneously. Besides, only tailoring the current profile of the more tunable e − beam instead of the e + beam is enough to obtain such favorable results. A theoretical analysis considering both linear and nonlinear plasma responses in hollow plasma channels is proposed to quantify the beam loading effects. This theory agrees very well with the simulation results and verifies the robustness of this beam loading regime over a wide range of parameters.

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Positron transport and acceleration in beam-driven plasma wakefield accelerators using plasma columns

Cited by 48 publications

References 28 publications

Stable Positron Acceleration in Thin, Warm, Hollow Plasma Channels

Stable Positron Acceleration in Thin, Warm, Hollow Plasma Channels

Acceleration and focusing of positron bunch in a dielectric waveguide accelerator with homogeneous plasma in transport channel

High efficiency uniform positron beam loading in a hollow channel plasma wakefield accelerator

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