A Proposed Dielectric-Loaded Resonant Laser Accelerator

Rosenzweig, James; Murokh, A.; Pellegrini, C.

doi:10.1103/physrevlett.74.2467

Cited by 121 publications

(69 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At optical frequencies dielectric materials withstand roughly two orders of magnitude larger field amplitudes than metals [4]. Together with the large optical field strength attainable with short laser pulses, dielectric laser accelerators (DLAs) hence may support acceleration gradients in the multi-GeV/m range [5]. With this technology lab-size accelerators, providing particle beams with energies currently only available at km-long facilities, seem feasible.…”

mentioning

confidence: 99%

Laser-Based Acceleration of Nonrelativistic Electrons at a Dielectric Structure

2013

View full text Add to dashboard Cite

A proof-of-principle experiment demonstrating dielectric laser acceleration of non-relativistic electrons in the vicinity of a fused-silica grating is reported. The grating structure is utilized to generate an electromagnetic surface wave that travels synchronously with and efficiently imparts momentum on 28 keV electrons. We observe a maximum acceleration gradient of 25 MeV/m. We investigate in detail the parameter dependencies and find excellent agreement with numerical simulations. With the availability of compact and efficient fiber laser technology, these findings may pave the way towards an all-optical compact particle accelerator. This work also represents the demonstration of the inverse Smith-Purcell effect in the optical regime.The acceleration gradients of linear accelerators are limited by breakdown phenomena at the accelerating structures under the influence of large surface fields. Today's accelerators, which are based on metal structures driven by radio frequency fields, operate at acceleration gradients of ∼20-50 MeV/m. The upper limit in future radio frequency accelerators, such as the discussed CLIC and ILC, is ∼100 MeV/m, given by the damage threshold of the metal surfaces [1][2][3]. At optical frequencies dielectric materials withstand roughly two orders of magnitude larger field amplitudes than metals [4]. Together with the large optical field strength attainable with short laser pulses, dielectric laser accelerators (DLAs) hence may support acceleration gradients in the multi-GeV/m range [5]. With this technology lab-size accelerators, providing particle beams with energies currently only available at km-long facilities, seem feasible. Here we demonstrate the efficacy of the concept.Charged particle acceleration with oscillating fields requires an electromagnetic wave with a phase speed equal to the particle's velocity and an electric field component parallel to the particle's trajectory. So far, laserbased particle acceleration schemes employ the longitudinal electric field component of a plasma wave [6][7][8] or of a tightly focused laser beam [9], but in both schemes the accelerating mode has a phase velocity that does not match the speed of light. Therefore, relativistic particles can only be accelerated over short distances and the maximum attainable energies of these devices are limited. Exploiting the near-field of periodic structures, for example of optical gratings, offers the possibility to continuously accelerate non-relativistic as well as relativistic particles. In essence, the effect of the grating is to rectify the oscillating field in the frame co-moving with the electron, conceptually similar to conventional radio frequency devices. Single gratings can only be used to accelerate non-relativistic electrons, an effect also known as the inverse Smith-Purcell effect [10][11][12]. However, double grating structures, in which electrons propagate in a channel between two gratings facing each other, support a longitudinal, accelerating speed-of-light eigenmode that can be used to a...

show abstract

mentioning

confidence: 99%

Laser-Based Acceleration of Nonrelativistic Electrons at a Dielectric Structure

2013

View full text Add to dashboard Cite

show abstract

“…Dielectric accelerator concepts begin with the Cherenkov wakefield accelerator (52,53), and the dielectric RFQ of Caspers (54). In the meantime, a resonantly excited dielectric accelerator has been proposed (55). For high-field applications, diamond shows promise.…”

Section: Advanced Structure Conceptsmentioning

confidence: 99%

Ultimate gradient in solid-state accelerators

Whittum

1999

AIP Conference Proceedings

View full text Add to dashboard Cite

We recall the motivation for research in high-gradient acceleration and the problems posed by a compact collider. We summarize the phenomena known to appear in operation of a solid-state structure with large fields, and research relevant to the question of the ultimate gradient. We take note of new concepts, and examine one in detail, a miniature particle accelerator based on an active millimeter-wave circuit and parallel particle beams. Baltimore, Maryland July 5-11, 1998 Work supported by U.S. Abstract. We recall the motivation for research in high-gradient acceleration and the problems posed by a compact collider. We summarize the phenomena known to appear in operation of a solid-state structure with large fields, and research relevant to the question of the ultimate gradient. We take note of new concepts, and examine one in detail, a miniature particle accelerator based on an active millimeter-wave circuit and parallel particle beams. Invited talk presented at the 8th Workshop on Advanced Accelerator Concepts

show abstract

“…The fields which obey this symmetry belong to what is termed in accelerator physics a "zero-mode", meaning a mode in which the phase advance per period is zero. This fundamental spatial harmonic of this mode is the familiar FabryPerot field pattern; the accelerating fields we wish to excite are actually at the first higher harmonic of the Floquet expansion of fields [5].…”

Section: )-Xmentioning

confidence: 99%

“…This limit being recognize~near field structures present considerable advantages over far-field devices [5]: they can be made resonant, allowing much smaller peak power lasers to be used; symmetry in the fields can be enforced more straightforwardly; the periodicity of the field can be controlled to keep the beam particles synchronous with the accelerating wave. In addition, use of structures with slab, as opposed to cylindrical symmetry, gives the additional advantage of allowing a larger current to be loaded into the device without inducing excessive beam loading, as the accelerating beam can be spread out in the "wide" transverse dimension.…”

mentioning

confidence: 99%

“…plasma beat-wave accelerators[l]), to devices in which the laser is used to directly produce the accelerating fields. Direct laser accelerators can further be divided into two types of schemes -transverse-field dominated systems such as inverse Cerenkov accelerators [2], so-called vacuum accelerators, or other small-angle crossed laser beam devices [3,4], and systems in which the accelerating field profile is dominated by boundary conditions which are less than a vacuum wavelength away from the charged particle beam path [5]. The transverse-field dominated, or fhr-field, devices have the advantage of mitigating the fields on which induce breakdown on whatever structures are used to shape the field profile, but do so at a price -the longitudinal or accelerating fields are small compared to the transverse fields which may be experienced by the beam particles, leading to inefficient acceleration, and high sensitivity to asymmetries in the field profile.…”

mentioning

confidence: 99%

See 1 more Smart Citation

An optimized slab-symmetric dielectric-based laser accelerator structure

Rosenzweig¹,

Schoessow²

1999

AIP Conference Proceedings

View full text Add to dashboard Cite

Abstract.A slab-symmetric, partially dielectric filled, laser excited structure which maybe used to accelerate charged particles is analyzed theoretically and computationally. The fields associated with the accelerating mode are calculated, as are aspects of the resonant filling and impedance matching of the structure to the exciting laser. It is shown through computer simulation that the accelerating mode in this structure can be excited resonantly and with large quality factor Q.. Practical aspects of implementing this structure as an accelerator are discussed.

show abstract

A Proposed Dielectric-Loaded Resonant Laser Accelerator

Cited by 121 publications

References 10 publications

Laser-Based Acceleration of Nonrelativistic Electrons at a Dielectric Structure

Laser-Based Acceleration of Nonrelativistic Electrons at a Dielectric Structure

Ultimate gradient in solid-state accelerators

An optimized slab-symmetric dielectric-based laser accelerator structure

Contact Info

Product

Resources

About