W. D. Kimura
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View article: Energy exchange between a laser beam and charged particles using inverse transition radiation and method for its use
Energy exchange between a laser beam and charged particles using inverse transition radiation and method for its use Open
A method and apparatus for exchanging energy between relativistic charged particles and laser radiation using inverse diffraction radiation or inverse transition radiation. The beam of laser light is directed onto a particle beam by means …
View article: Considerations for a TeV collider based on dielectric laser accelerators
Considerations for a TeV collider based on dielectric laser accelerators Open
Particle acceleration in dielectric microstructures powered by infrared lasers, or “dielectric laser acceleration” (DLA), is a promising area of advanced accelerator research with the potential to enable more affordable and higher-gradient…
View article: Density Tailored Capillary Discharge (Final Technical Report)
Density Tailored Capillary Discharge (Final Technical Report) Open
This final report describes efforts to validate a novel way to drive capillary discharges in order to achieve true matched guiding of a focused laser beam traveling along the capillary. Achieving such matched guiding is important for laser…
View article: Electron beam guiding by a laser Bessel beam
Electron beam guiding by a laser Bessel beam Open
We investigate the dynamics of electrons counterpropagating along a radially polarized optical Bessel beam (OBB). (i) It is shown that a significant fraction of the electrons can be transversally trapped by the OBB even in the case of “unm…
View article: Distributed Magnetic Measurements Using Fiber Optic Pulsed Polarimetry (Final Report)
Distributed Magnetic Measurements Using Fiber Optic Pulsed Polarimetry (Final Report) Open
Measurement of the magnetic fields surrounding magnetic fusion energy (MFE) devices, such as tokamaks, is critical for characterizing and monitoring the plasma inside these devices, and it is especially important for detecting plasma insta…
View article: Measurements of DIII-D poloidal field by fiber-optic pulsed polarimetry
Measurements of DIII-D poloidal field by fiber-optic pulsed polarimetry Open
A new technique for measuring the spatial and temporal structure of the poloidal field is presented, whereby the magnetic field causes the polarization of light traveling through an optical fiber to rotate via the Faraday effect by an amou…
View article: Mid-IR lasers for energy frontier plasma accelerators and colliders
Mid-IR lasers for energy frontier plasma accelerators and colliders Open
Plasma wakefield accelerators driven by solid-state, near-IR lasers have been considered as an alternative to conventional RF accelerators for next-generation TeV-class lepton colliders. Here, we extend this study to the mid-IR spectral do…
View article: Particle confinement by a radially polarized laser Bessel beam
Particle confinement by a radially polarized laser Bessel beam Open
The stable trajectory of a charged particle in an external guiding field is an essential condition for its acceleration or for forcing it to generate radiation. Examples of possible guiding devices include a solenoidal magnetic field or pe…
View article: Mid-infrared lasers for energy frontier plasma accelerators
Mid-infrared lasers for energy frontier plasma accelerators Open
Plasma wake field accelerators driven with solid-state near-IR lasers have been considered as an alternative to conventional rf accelerators for next-generation TeV-class lepton colliders. Here, we extend this study to the mid-IR spectral …
View article: Two-beam accelerator with active medium as the energy source
Two-beam accelerator with active medium as the energy source Open
While a Cherenkov wake propagates in a perfectly reflecting waveguide loaded with active medium, a part of its spectrum is amplified. Due to gain enhancement the amplified frequency components become dominant making the wake an effectively…
View article: Ultrashort microbunch electron source
Ultrashort microbunch electron source Open
A new type of electron beam source is proposed that combines a DC field and AC field from a laser beam in between the anode-cathode gap. Prior researchers have demonstrated the ability for this configuration to produce ultrashort electron …
View article: Channeling radiation in vacuum
Channeling radiation in vacuum Open
We demonstrate that electrons interacting with an optical, radially-polarized Bessel-beam emit radiation of identical characteristics as channeling radiation. However, because this happens in vacuum, there is no scattering caused by the cr…