A compact electron source for the dielectric laser accelerator

Hirano, T.; Urbánek, Karel; Ceballos, Andrew; Black, Dylan S.; Miao, Yu; England, R. J.; Byer, Robert L.; Leedle, Kenneth J.

doi:10.1063/5.0003575

Cited by 21 publications

(11 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To create them, it is planned to use an electronoptical system with a needle cathode irradiated by the light of a titanium-sapphire laser. A similar electron gun was demonstrated in paper [29] on direct laser acceleration of electrons in a comb-type dielectric accelerating structure. The use of the same laser pulse for both cathode irradiation and generating the terahertz radiation significantly simplifies the synchronization of electron bunches with a terahertz field in the accelerating structure.…”

Section: Scheme Of the Experiments On Acceleration Of Electron Bunches By Ultrashort Pulses Of Terahertz Radiationmentioning

confidence: 76%

Focusing Waveguide Structure for High-Gradient Electron Acceleration by Picosecond Terahertz Pulses

Bodrov

Vikharev

Kuzikov

et al. 2021

Radiophys Quantum El

View full text Add to dashboard Cite

We propose an ultra-wideband metal-dielectric structure for high-gradient acceleration of electrons by the field of an ultrashort terahertz pulse. The structure effectively focuses the terahertz beam into the electron channel and accelerates particles under synchronism with the terahertz field. The simulations show that when using terahertz pulses obtained by conversion of laser radiation in a nonlinear crystal and having an energy of 2 μJ and a duration of about 0.5 ps of a positive electric-field polarity, the electron energy can be increased from 50 to 55.7 keV in the structure with a length of 1 mm. A scheme for a demonstration experiment is proposed, assuming that electrons are accelerated to an initial energy of 50 keV by a needle photocathode irradiated by the same laser that produces accelerating terahertz pulses.

show abstract

Section: Scheme Of the Experiments On Acceleration Of Electron Bunches By Ultrashort Pulses Of Terahertz Radiationmentioning

confidence: 76%

Focusing Waveguide Structure for High-Gradient Electron Acceleration by Picosecond Terahertz Pulses

Bodrov

Vikharev

Kuzikov

et al. 2021

Radiophys Quantum El

View full text Add to dashboard Cite

show abstract

“…A typical 200 keV system will have roughly a 1 meter distance from the electron source to the DLA. Efforts have been made to produce a a more compact electron injector by using an electro-static immersion lens built into the electron source region to directly focus the beam coming off of a nanotip source [24]. This allows the nanotip emitter to be re-imaged into a DLA device in less than 25 mm distance at 96 keV beam energy as shown in Fig.…”

Section: Ultra-low Emittance Injectormentioning

confidence: 99%

Challenges in simulating beam dynamics of dielectric laser acceleration

Niedermayer

Adelmann

Bettoni

et al. 2019

Int. J. Mod. Phys. A

View full text Add to dashboard Cite

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.

show abstract

“…Like many groundbreaking technologies, OFC is a breaking technique and has given rise to substantial advances in many research fields. [9] It provides a broadband waveform with well-defined phase coherence and is being explored for a myriad of possible applications such as attosecond pulse generation, [10] atomic clock networks, [11] and precision spectroscopy, [12] distance measurements, [13] etc. More recently, it has been suggested that OFC could provide stable physical channels and information carriers for multicarrier transmission, where the effective nonlinearity correction (NLC) can be performed at both transmitter and receiver side, thus overcoming the nonlinear capacity limit in the long-haul fiber communication.…”

Section: Introductionmentioning

confidence: 99%

Quadrature Acoustic Frequency Combs Multiplexing for Massive Parallel Underwater Acoustic Communications

Qian

Sun

et al. 2021

Annalen der Physik

View full text Add to dashboard Cite

Underwater acoustic (UWA) communication has been developing rapidly over the past decades for its crucial position in resource exploration, environmental monitoring, and scientific research. However, the transmission data rate of UWA communication is limited by the narrow bandwidth of the underwater acoustic channel. Here, the generation of quadrature acoustic frequency combs (AFCs) is first reported. Massive parallel channels achieved with multiplexing of AFCs for UWA communication are demonstrated. The generated AFCs have unique characteristics which have a stable and precise division in frequency and time domain simultaneously with carrier spacing of 1 Hz with the stability of 10 −8 . The different frequency spacing in combs leads to different teeth spacings in time, which is orthogonal and separable in the time domain. The orthogonality among AFCs provides a new dimension for multiplexing and can drastically increase channel efficiency. The underwater acoustic communication experiments demonstrate that it is drastically increasing the transmission rate to 45.33 kb s −1 and high spectral efficiency of 1.51 (channel s −1 ) Hz −1 without utilizing other modulation techniques by a single transducer. Since AFCs multiplexing is a completely independent degree of freedom that can be readily integrated with other high order modulation techniques, such as quadrature amplitude modulation and phase-shift keying, in a single channel, AFCs multiplexing opens a new dimension for acoustic communication.

show abstract

A compact electron source for the dielectric laser accelerator

Cited by 21 publications

References 28 publications

Focusing Waveguide Structure for High-Gradient Electron Acceleration by Picosecond Terahertz Pulses

Focusing Waveguide Structure for High-Gradient Electron Acceleration by Picosecond Terahertz Pulses

Challenges in simulating beam dynamics of dielectric laser acceleration

Quadrature Acoustic Frequency Combs Multiplexing for Massive Parallel Underwater Acoustic Communications

Contact Info

Product

Resources

About