Proposed structure for a crossed-laser beam, GeV per meter gradient, vacuum electron linear accelerator

Huang, Yen-Chieh; Zheng, Donghao; Tulloch, William; Byer, Robert L.

doi:10.1063/1.116731

Cited by 78 publications

(42 citation statements)

References 6 publications

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“…The proposed undulator device is motivated by the possibility of future dielectric-based laser-driven particle accelerators that are expected to produce GeV=m acceleration gradients accompanied by a low-emittance, lowenergy spread, and high-repetition rate attosecond electron pulses [1][2][3][4][5][6]. Development efforts for ultralow emittance [7] and optically bunched electron sources [8,9] as well as for dielectric-structure laser-driven particle accelerators are underway [10 -13], and although these technologies are presently not mature, the possibility of a compatible undulator device that takes advantage of the ultrashort electron pulse structure appears worthwhile to explore.…”

Section: Introductionmentioning

confidence: 99%

Proposed dielectric-based microstructure laser-driven undulator

Plettner

Byer

2008

Phys. Rev. ST Accel. Beams

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We describe a proposed all-dielectric laser-driven undulator for the generation of coherent short wavelengths and explore the required electron beam parameters for its operation. The key concept for this laser-driven undulator is its ability to provide phase synchronicity between the deflection force from the laser and the electron beam for a distance that is much greater than the laser wavelength. Because of the possibility of high-peak electric fields from ultrashort pulse lasers on dielectric materials, the proposed undulator is expected to produce phase-synchronous GV=m deflection fields on a relativistic electron bunch and therefore lead to a very compact free electron based radiation device.

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Section: Introductionmentioning

confidence: 99%

Proposed dielectric-based microstructure laser-driven undulator

Plettner

Byer

2008

Phys. Rev. ST Accel. Beams

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“…Closed optical structures and near-field accelerators with dimensions comparable to the wavelength are both being considered. Examples of these two are: a) the LEAP [1] crossed laser beam accelerator where the interaction between the crossed laser beams and the particles is limited by slits to satisfy the Lawson-Woodward theorem [2,3], and b) the photonic band-gap (PBG) concept where a laser pulse is guided in a dielectric structure with a vacuum tunnel bored in its center [4]. Lithography, which would result in planar structures, and optical fiber drawing are manufacturing techniques that seem well suited for laser driven structures that have typical dimensions of a few microns.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Design of Optical Bragg Acceleration Structures

Mizrahi¹

2004

AIP Conference Proceedings

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Abstract. It is demonstrated that a Bragg waveguide consisting of a series of dielectric layers may form an excellent optical acceleration structure. Confinement of the accelerating fields is achieved for both planar and cylindrical configurations by adjusting the first dielectric layer width. A typical structure made of Silica and Zirconia may support gradients of the order of 1GV/m with an interaction impedance of a few hundreds of Ohms and with an energy velocity of less than 0.5c. An interaction impedance of about one thousand Ohms may be obtained by replacing the Zirconia with a (fictitious) material of ε = 25. Special attention is paid to the wake-field developing in such a structure. In case of a relatively small number of layers, a qualitative approach shows that the emitted power is inversely proportional to the number of micro-bunches. Quantitative results are given for a higher number of dielectric layers, showing that in comparison to a structure bounded by metallic walls, the emitted power is significantly smaller due to propagation bands allowing electromagnetic energy to escape. The efficiency of the acceleration structures is investigated and shown to have an optimum as a function of the vacuum core dimension.

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“…Open, quasi-optical structures and near-field accelerators with dimensions comparable to the wavelength are both being considered. Examples of these two are: a) the LEAP [1] crossed laser beam accelerator where the interaction between the crossed laser beams and the particles is limited by slits to satisfy the Lawson-Woodward theorem [2][3], and b) the photonic band-gap (PBG) concept where a laser pulse is guided in a dielectric structure with a vacuum tunnel bored in its center [4]. Lithography, which would result in planar structures, and optical fiber drawing are manufacturing techniques that seem well suited for laser driven structures that have typical dimensions of a few microns.…”

Section: Introductionmentioning

confidence: 99%

Optical Accelerator: Scaling Laws and Figures of Merit

Schächter¹,

Byer²,

Siemann³

2002

AIP Conference Proceedings

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Abstract. Indications that solid-state lasers will reach wall-plug to light efficiencies of 30% or more make a laser-driven vacuum-accelerator increasingly appealing. Since at the wavelength of relevant lasers, dielectrics may sustain significantly higher electric field and transmit power with reduced loss comparing to metals, the basic assumption is that laser accelerator structures will be dielectrics. For structures that have typical dimensions of a few microns, present manufacturing constraints entail planar structures that in turn, require re-evaluation of many of the scaling laws that were developed for azimuthally symmetric structures. Moreover, structures that operate at a wavelength of a few centimeters are machined today with an accuracy of microns. In future it will not be possible to maintain 4-5 orders of magnitude difference between operating wavelength and achievable tolerance. An additional difference is, that contrary to present accelerators where the number of electrons in a micro-bunch is of the order of a 10 10 , in an optical structure this number drops to a few thousands. Consequently, the relative impact of individual electrons may be significantly larger. Acceleration structures with higher degree of symmetry, similar to optical fibers, have also some inherent advantages however thermal gradients as well as heat dissipation may become critical impediments. The impact of all these factors on the performance of a laser accelerator structure needs to be determined. Efficiency, wakes and emittance scaling laws that have been developed recently will be presented. It will be shown that there are some inherent advantages in combining the accelerator structure and the laser cavity in one system.

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Proposed structure for a crossed-laser beam, GeV per meter gradient, vacuum electron linear accelerator

Cited by 78 publications

References 6 publications

Proposed dielectric-based microstructure laser-driven undulator

Proposed dielectric-based microstructure laser-driven undulator

Analysis and Design of Optical Bragg Acceleration Structures

Optical Accelerator: Scaling Laws and Figures of Merit

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