Multi-proton bunch driven hollow plasma wakefield acceleration in the nonlinear regime

Li, Yangmei; Xia, Guoxing; Lotov, K. V.; Sosedkin, A. P.; Hanahoe, Kieran; Apsimon, O.

doi:10.1063/1.4995354

Cited by 5 publications

(10 citation statements)

References 62 publications

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“…Nevertheless, it is not the case in our configuration. The multiple proton bunches will lose focusing from the plasma electrons and diverge significantly [168]. This in turn leads to more plasma electrons flowing in and ruining the positron beam quality.…”

Section: Simulation Resultsmentioning

confidence: 99%

Studies of Proton Driven Plasma Wakeﬁeld Acceleration

Li¹

2020

Springer Theses

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signs and Patents Act 1988 (as amended) and regulations issued under it or, where appropriate, in accordance with licensing agreements which the University has from time to time. This page must form part of any such copies made.3. The ownership of certain Copyright, patents, designs, trademarks and other intellectual property (the "Intellectual Property") and any reproductions of copyright works in the thesis, for example graphs and tables ("Reproductions"), which may be described in this thesis, may not be owned by the author and may be owned by third parties. Such Intellectual Property and Reproductions cannot and must not be made available for use without the prior written permission of the owner(s) of the relevant Intellectual Property and/or Reproductions.4. Further information on the conditions under which disclosure, publication and commercialisation of this thesis, the Copyright and any Intellectual

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Section: Simulation Resultsmentioning

confidence: 99%

Studies of Proton Driven Plasma Wakeﬁeld Acceleration

Li¹

2020

Springer Theses

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“…In this section, we focus on the wake characteristics in the second bubble where the witness bunch is accelerated. Note that the witness bunch is not introduced in all simulations, as there is no quadrupole module adopted so the electron bunch if injected will diverge even in the baseline case [4,5].…”

Section: Wake Characteristics In the Witness Areamentioning

confidence: 99%

“…In our previous work, hollow plasma channels have been employed to resolve this issue [4,5]. The hollow channel enables the witness electron bunch to reside in a region, which is completely free from plasma electrons and ions.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Misalignment Induced Effects in Proton Driven Hollow Plasma Wakefield Acceleration

2020

Studies of Proton Driven Plasma Wakeﬁeld Acceleration

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Hollow plasma has been introduced into the proton-driven plasma wakefield accelerators to overcome the issue of beam quality degradation caused by the nonlinear transverse wakefields varying in radius and time in uniform plasma. It has been demonstrated in simulations that the electrons can be accelerated to energy frontier with well-preserved beam quality in a long hollow plasma channel. However, this scheme imposes tight requirements on the beam-channel alignment. Otherwise asymmetric transverse wakefields along the axis are induced, which could distort the driving bunch and deteriorate the witness beam quality. In this paper, by means of the 2D cartesian particle-in-cell simulations, we examine the potentially detrimental effects induced by the driving beam-channel offset and initial driver tilt, and then propose and assess the solutions to these driver inaccuracy issues.

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“…Nevertheless, it is not the case in our configuration. The multiple proton bunches will lose focusing from the plasma electrons and diverge significantly [18]. This in turn leads to more plasma electrons flowing in and ruining the positron beam quality.…”

Section: Later) This Type Of Region Where the Bunch Ismentioning

confidence: 99%

“…By means of hollow plasma, multiple proton bunches have been demonstrated in simulations to successfully work in the nonlinear regime and accelerate electrons to ∼TeV with preserved beam quality [18]. In this case, the focusing to proton bunches mainly comes from the plasma electrons attracted into the channel.…”

Section: The Dilemma In Preserving the Beam Qualitymentioning

confidence: 99%

High-quality positrons from a multi-proton bunch driven hollow plasma wakefield accelerator

Xia

Lotov

et al. 2019

Plasma Phys. Control. Fusion

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By means of hollow plasma, multiple proton bunches work well in driving nonlinear plasma wakefields and accelerate electrons to energy frontier with preserved beam quality.However, the acceleration of positrons is different because the accelerating structure is strongly charge dependent. There is a discrepancy between keeping a small normalized emittance and a small energy spread. This results from the conflict that the plasma electrons used to provide focusing to the multiple proton bunches dilute the positron bunch. By loading an extra electron bunch to repel the plasma electrons and meanwhile reducing the plasma density slightly to shift the accelerating phase with a conducive slope to the positron bunch, the positron bunch can be accelerate to 400 GeV (40% of the driver energy) with an energy spread as low as 1% and well preserved normalized emittance. The successful generation of high quality and high energy positrons paves the way to the future energy frontier lepton colliders.

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Multi-proton bunch driven hollow plasma wakefield acceleration in the nonlinear regime

Cited by 5 publications

References 62 publications

Studies of Proton Driven Plasma Wakeﬁeld Acceleration

Studies of Proton Driven Plasma Wakeﬁeld Acceleration

Assessment of Misalignment Induced Effects in Proton Driven Hollow Plasma Wakefield Acceleration

High-quality positrons from a multi-proton bunch driven hollow plasma wakefield accelerator

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