Simulations and plans for possible DLA experiments at SINBAD

Mayet, Frank; Assmann, R.; Bödewadt, J.; Brinkmann, R.; Dorda, U.; Kuropka, Willi; Lechner, Christoph; Marchetti, Barbara; Zhu, Jun

doi:10.1016/j.nima.2018.01.088

Cited by 23 publications

(13 citation statements)

References 14 publications

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“…Moreover, relativistic energy experiments are also outlined at the SINBAD facility at DESY, where an inverse FEL undulator together with a chicane will be employed for optical-scale bunching of the beam before it is injected into the DLA. Driving the DLA with the same laser as is used for seeding the inverse FEL allows for the precise phase control required for coherent acceleration [42].…”

Section: Ongoing Experimentsmentioning

confidence: 99%

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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Section: Ongoing Experimentsmentioning

confidence: 99%

Challenges in simulating beam dynamics of dielectric laser acceleration

Niedermayer

Adelmann

Bettoni

et al. 2019

Int. J. Mod. Phys. A

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“…ARES is a photoinjector and linac, currently under construction at the SINBAD facility at DESY [26,36,37], with the aim of producing low-charge (few pC to sub-pC) electron bunches with 100 MeV energy, fs and sub-fs duration and excellent arrival time stability. These bunches will be used in the future to test novel acceleration techniques, including dielectric structures [38] and laser plasma wakefield acceleration [39,40].…”

Section: Outlook and Conclusionmentioning

confidence: 99%

Single-shot reconstruction of core 4D phase space of high-brightness electron beams using metal grids

Marx

Navarro

Cesar

et al. 2018

Phys. Rev. Accel. Beams

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This paper details the development of a single-shot diagnostic technique for the 4D average and core phase space densities of low-charge, high-brightness electron beams, based on the analysis of shadow point-projection images of metal grids. This technique is similar to the standard pepper pot method, although it allows much greater transmission of the beam and therefore is more suitable for low-charge electron beams. Transverse coupling terms are included in the analysis, allowing the complete 4D transverse beam matrix to be reconstructed. The 4D beam phase space information is extremely important for the characterization of nonround beams. An analysis of the resolution limits and experimental benchmarking of the technique with pepper-pot emittance measurements are presented.

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“…Sufficient space at the linac exit has been reserved for a future energy upgrade and will temporarily host an experimental area [71], while the matching lattice will temporarily be used for beam diagnostics purposes.…”

Section: Linac Designmentioning

confidence: 99%

Conceptual and Technical Design Aspects of Accelerators for External Injection in LWFA

et al. 2018

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Laser driven Wake-Field Acceleration (LWFA) has proven its capability of accelerating electron bunches (e-bunches) to up to 4 GeV energy in a single stage while reaching gradients up to hundreds of GV/m. Because of the short period of the accelerating field (typically ranging from 100 fs to 1 ps duration) and the requirement of extremely small beam size (typically smaller than 1 µm) to match the channel, e-bunches can reach extremely high densities. They can be either extracted directly from the plasma or externally injected. The study of the external injection is interesting for two main reasons. On the one hand this method allows better control of the quality of the input beam and on the other hand it is in general necessary when a staged approach of the accelerator is considered. The interest in producing, characterizing and transporting high brightness ultra-short e-bunches has grown together with the interest in LWFA and other novel high-gradient acceleration techniques. In this paper we will review the principal techniques for producing and shaping ultra-short electron bunches with the example of the SINBAD-ARES (Accelerator Research Experiment at SINBAD) linac at the Deutsches Elektronen-Synchrotron (DESY). Our goal is to show how the design of the SINBAD-ARES linac satisfies the requirements for generating high brightness LWFA probes. In the last part of the paper we shall also comment on the technical challenges for electron control and characterization.

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Simulations and plans for possible DLA experiments at SINBAD

Cited by 23 publications

References 14 publications

Challenges in simulating beam dynamics of dielectric laser acceleration

Challenges in simulating beam dynamics of dielectric laser acceleration

Single-shot reconstruction of core 4D phase space of high-brightness electron beams using metal grids

Conceptual and Technical Design Aspects of Accelerators for External Injection in LWFA

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