The wake-field excitation in plasma-dielectric structure by sequence of short bunches of relativistic electrons

Onishchenko, I.N.; Kiseljob, V.A.; Berezin, A. K.; Sotnikov, G. V.; Uskov, V. V.; Linnik, A. F.; Fainberg, Ya.B.

doi:10.1109/pac.1995.504790

Cited by 10 publications

(3 citation statements)

References 1 publication

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“…In principle, a periodic sequence of electron bunches can be used to increase the accelerating field amplitude [19,20]. In a dielectric-lined structure operating in a single-mode excitation regime, the wakefields of a train of bunches spaced by the period of the wake wave are superimposed linearly.…”

Section: Excitation Of a Two-channel Coaxial Structure By A Bunchmentioning

confidence: 99%

Coaxial two-channel high-gradient dielectric wakefield accelerator

Sotnikov

Marshall

Hirshfield

2009

Phys. Rev. ST Accel. Beams

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A new scheme for a dielectric wakefield accelerator is proposed that employs a cylindrical multizone dielectric structure configured as two concentric dielectric tubes with outer and inner vacuum channels for drive and accelerated bunches. Analytical and numerical studies have been carried out for such coaxial dielectric-loaded structures (CDS) for high-gradient acceleration. An analytical theory of wakefield excitation by particle bunches in a multizone CDS has been formulated. Numerical calculations are presented for an example of a CDS using dielectric tubes with dielectric permittivity 5.7, having external diameters of 2.121 and 0.179 mm with inner diameters of 2.095 and 0.1 mm. An annular 5 GeV, 6 nC electron bunch with rms length of 0.035 mm energizes a wakefield on the structure axis having an accelerating gradient of $600 MeV=m with a transformer ratio $8:1. The period of the accelerating field is $0:33 mm. If the width of the drive bunch channel is decreased, it is possible to obtain an accelerating gradient of >1 GeV=m while keeping the transformer ratio approximately the same. Full numerical simulations using a particle-in-cell code have confirmed results of the linear theory and furthermore have shown the important influence of the quenching wave that restricts the region of the wakefield to within several periods following the drive bunch. Numerical simulations for another example have shown nearly stable transport of drive and accelerated bunches through the CDS, using a short train of drive bunches.

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Section: Excitation Of a Two-channel Coaxial Structure By A Bunchmentioning

confidence: 99%

Coaxial two-channel high-gradient dielectric wakefield accelerator

Sotnikov

Marshall

Hirshfield

2009

Phys. Rev. ST Accel. Beams

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“…6. Several experiments have aimed at going a step further, trying to explore more subtle aspects of superposition of fields and waveguide modes [6][7][8].…”

Section: Experiments Exploring Superpositionmentioning

confidence: 99%

Survey of advanced dielectric wakefield accelerators

Conde

2007

2007 IEEE Particle Accelerator Conference (PAC)

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“…To implement the wakefield acceleration method in a solid-density plasma, new types of lasers are required, which, in many respects, remain a promising idea [17,18]. The excitation of a wakefield in a dielectric was also previously investigated (see [19,20]). When the wakefield is excited by a beam driver, it is possible to effectively excite the wakefield even in the non-resonant case [21][22][23] and provide a high transformer ratio value, which can be approximately defined as the ratio of the maximum accelerating field after the driver to the maximum decelerating field inside the driver (see [24,25]).…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Way of Phase Synchronization of a Self-Injected Bunch and an Accelerating Wakefield in Solid-State Plasma

2022

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The electron acceleration, in a laser wakefield accelerator, controlled through plasma density inhomogeneity is studied on a basis of 2.5-dimensional particle-in-cell simulation. The acceleration requires a concordance of the density scale length and shift of the accelerated electron bunch relative to wake bubble during electron acceleration. This paper considers the excitation of a wakefield in plasma with a density equal to the density of free electrons in metals, solid-state plasma (the original idea of Prof. T. Tajima), in the context of studying the wakefield process. As is known in the wake process, as the wake bubble moves through the plasma, the self-injected electron bunch shifts along the wake bubble. Then, the self-injected bunch falls into the phase of deceleration of the wake wave. In this paper, support of the acceleration process by maintaining the position of the self-injected electron bunch using an inhomogeneous plasma is proposed. It is confirmed that the method of maintaining phase synchronization proposed in the article by using a nonuniform plasma leads to an increase in the accelerating gradient and energy of the accelerated electron bunch in comparison with the case of self-injection and acceleration in a homogeneous plasma.

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The wake-field excitation in plasma-dielectric structure by sequence of short bunches of relativistic electrons

Cited by 10 publications

References 1 publication

Coaxial two-channel high-gradient dielectric wakefield accelerator

Coaxial two-channel high-gradient dielectric wakefield accelerator

Survey of advanced dielectric wakefield accelerators

Investigation of the Way of Phase Synchronization of a Self-Injected Bunch and an Accelerating Wakefield in Solid-State Plasma

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