Design of a Scalable Integrated Nanophotonic Electron Accelerator on a Chip

Niedermayer, Uwe; Lautenschläger, Jan; Egenolf, Thilo

doi:10.1103/physrevapplied.16.024022

Cited by 20 publications

(16 citation statements)

References 35 publications

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“…As discussed in [69], the 3D scheme has advantages at low energy, where the confinement to the extremely small aperture can also be provided in the vertical axis. Recently, based on this scheme and using Silicon-on-Insulator (SOI) wafers, a completely scalable multi-stage accelerator on a chip could be designed [70]. At high energy, the 3D APF scheme allows stronger focusing gradients, since only the square-sum of the two focusing constants vanishes with 𝛾 −2 [69], such that in a counter-phase arrangement the two transverse planes can exhibit focusing gradients that are not constrained by the beam energy.…”

Section: Beam Transport and Focusingmentioning

confidence: 99%

“…Either the electron beam signal or the light scattered out of plane may be used as a diagnostic tool for sequentially optimizing the phase shifters. These phase shifters may also be used to implement laser-driven focusing schemes, such as ponderomotive focusing [40] or alternating phase focusing [65], which have shown significant promise for DLA in recent simulation studies [70]. Thus, integrated optical phase control gives a path forward for combined acceleration and focusing of the electron beam.…”

Section: Laser Coupling For Multi-stage Transportmentioning

confidence: 99%

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Considerations for a TeV Collider Based On Dielectric Laser Accelerators

England,

Niedermayer,

Schachter

et al. 2022

Preprint

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electric laser acceleration" (DLA), is a promising area of advanced accelerator research with the potential to enable more affordable and higher-gradient accelerators for energy frontier science and a variety of other applications. DLA leverages well-established industrial fabrication capabilities and the commercial availability of tabletop lasers to reduce cost, with axial accelerating fields in the GV/m range. Desirable luminosities would be obtained by operating with very low charge per bunch but at extremely high repetition rates. And as a consequence of its unique operating parameter regime, coupling of the laser to the accelerator can potentially be in the 50% range and with low beamstrahlung energy loss due at the interaction point, making DLA a promising approach for a future multi-TeV linear collider.

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Section: Beam Transport and Focusingmentioning

confidence: 99%

Section: Laser Coupling For Multi-stage Transportmentioning

confidence: 99%

Considerations for a TeV Collider Based On Dielectric Laser Accelerators

England,

Niedermayer,

Schachter

et al. 2022

Preprint

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“…Particularly, counter-phase structures can be implemented on Silicon on Insulator (SOI) wafers, which are commercially available and their processing is standard in nanophotonics. Moreover, the pillars on SOI can be grounded to remove lost electrons by individual lateral traces, without deteriorating the structure bandwidth [15,20].…”

Section: Principle and Nanophotonic Structuresmentioning

confidence: 99%

“…The sub-400 nm wide accelerator channel and field non-uniformity in dielectric laser accelerators place very strict emittance requirements on the electron injector. Typical acceptances in an APF DLA designed for a 2 micron drive laser require a ~10 nm beam waist radius and 1 mrad beam divergence at 30 keV to prevent substantial beam loss during acceleration [20]. Generating such a 10 pm-rad beam essentially requires the use of a nanometer scale cathode, most commonly implemented via nanotips of various flavors.…”

Section: Ultra-low Emittance Injectormentioning

confidence: 99%

“…Furtheremore it can be seen that a field enhancement is created by the reflection from the oxide to substrate interface. A complete threedimensional accelerator design on a commercial SOI wafer, doubling the electron energy is shown in [20], alongside with a complete start to end simulation, first in DLAtrack6D [9] and then a full simulation in CST Particle Studio [32]. A major finding of this extensive simulation study was that the vertical phase gradient 𝜕 𝑥 arg 𝑒 1 (𝑥, 𝑦) needs to be controlled, as it exerts a constant vertical force similar to a homogeneous magnetic field that would drive the beam outside the channel.…”

Section: Principle and Nanophotonic Structuresmentioning

confidence: 99%

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Challenges in simulating beam dynamics of dielectric laser acceleration

Niedermayer

Adelmann

Bettoni

et al. 2019

Int. J. Mod. Phys. A

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Dielectric Laser Acceleration (DLA) achieves the highest gradients among structure-based electron accelerators. The use of dielectrics increases the breakdown field limit, and thus the achievable gradient, by a factor of at least 10 in comparison to metals. Experimental demonstrations of DLA in 2013 led to the Accelerator on a Chip International Program (ACHIP), funded by the Gordon and Betty Moore Foundation. In ACHIP, our main goal is to build an accelerator on a silicon chip, which can accelerate electrons from below 100 keV to above 1 MeV with a gradient of at least 100 MeV/m. For stable acceleration on the chip, magnet-only focusing techniques are insufficient to compensate the strong acceleration defocusing. Thus, spatial harmonic and Alternating Phase Focusing (APF) laser-based focusing techniques have been developed. We have also developed the simplified symplectic tracking code DLAtrack6D, which makes use of the periodicity and applies only one kick per DLA cell, which is calculated by the Fourier coefficient of the synchronous spatial harmonic. Due to coupling, the Fourier coefficients of neighboring cells are not entirely independent and a field flatness optimization (similarly as in multi-cell cavities) needs to be performed. The simulation of the entire accelerator on a chip by a Particle In Cell (PIC) code is possible, but impractical for optimization purposes. Finally, we have also outlined the treatment of wake field effects in attosecond bunches in the grating within DLAtrack6D, where the wake function is computed by an external solver.

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Direct space–time manipulation mechanism for spatio-temporal coupling of ultrafast light field

Lin,

Feng,

Cai

et al. 2024

Nat Commun

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Traditionally, manipulation of spatiotemporal coupling (STC) of the ultrafast light fields can be actualized in the space-spectrum domain with some 4-f pulse shapers, which suffers usually from some limitations, such as spectral/pixel resolution and information crosstalk associated with the 4-f pulse shapers. This work introduces a novel mechanism for direct space-time manipulation of ultrafast light fields to overcome the limitations. This mechanism combines a space-dependent time delay with some spatial geometrical transformations, which has been experimentally proved by generating a high-quality STC light field, called light spring (LS). The LS, owing a broad topological charge bandwidth of 11.5 and a tunable central topological charge from 2 to −11, can propagate with a stable spatiotemporal intensity structure from near to far fields. This achievement implies the mechanism provides an efficient way to generate complex STC light fields, such as LS with potential applications in information encryption, optical communication, and laser-plasma acceleration.

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Design of a Scalable Integrated Nanophotonic Electron Accelerator on a Chip

Cited by 20 publications

References 35 publications

Considerations for a TeV Collider Based On Dielectric Laser Accelerators

Considerations for a TeV Collider Based On Dielectric Laser Accelerators

Challenges in simulating beam dynamics of dielectric laser acceleration

Direct space–time manipulation mechanism for spatio-temporal coupling of ultrafast light field

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