Short-wavelength radiation pulses with time-varying orbital angular momentum from tailored relativistic electron beams

Sun, Hao; Xiao, Yaozong; Liu, Bo; Feng, Chao

doi:10.1364/ol.496317

Cited by 4 publications

(3 citation statements)

References 28 publications

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“…The generation of electron beams carrying orbital angular momentum (OAM) [53][54][55][56][57][58][59][60][61][62][63][64][65][66][67][68][69] refers to the creation of electron beams that possess a well-defined helical phase front, similar to a spiral staircase. This helical structure of the electron beam arises due to the presence of OAM, which is a property of a wave that describes the rotation of the wave's phase around its axis of propagation.…”

Section: Generation Of Electron Beams Carrying Orbital Angular Momentummentioning

confidence: 99%

Extended Field Interactions in Poisson’s Equation Revision

Pinheiro

2024

Applied Sciences

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This investigation introduces a new variational approach to refining Poisson’s equation, enabling the inclusion of a broader spectrum of physical phenomena, particularly in the emerging fields of spintronics and the analysis of resonant structures. The innovative formulation extends the traditional capabilities of Poisson’s equation, offering a nonlocal extension to classical theories of gravitation and opening new directions for energy conversion and enhanced communication technologies. By introducing a novel geometric structure, ω˜, into the equation, a deeper understanding of electrostatic potentials is achieved, and the intricate dynamics of the gravitational potential in systems characterized by radial vorticity fluctuations are illuminated. Furthermore, the research elucidates the generation of longitudinal electromagnetic waves and resonant phenomena within dusty plasma media, thereby contributing to the methodological advances in the study of nonequilibrium systems. These theoretical advances have the potential to transform the understanding of complex physical systems and open up opportunities for significant technological achievements across a range of scientific sectors.

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Section: Generation Of Electron Beams Carrying Orbital Angular Momentummentioning

confidence: 99%

Extended Field Interactions in Poisson’s Equation Revision

Pinheiro

2024

Applied Sciences

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“…Extensive work has been done in theorizing [65][66][67][68][69][70][71][72][73][74] and demonstrating [75][76][77] ways to create OAM beams at FELs. Here we will review two of the most basic schemes.…”

Section: Undulator Radiationmentioning

confidence: 99%

Generation and applications of x-ray and extreme ultraviolet beams carrying orbital angular momentum

McCarter,

De Long,

Todd Hastings

et al. 2024

J. Phys.: Condens. Matter

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In addition to spin angular momentum, light can carry orbital angular momentum. The orbital angular momentum degree of freedom in the extreme ultraviolet and x-ray regimes enables fundamental studies of light-matter interactions and new methods to study materials. Advances in x-ray optics, as well as undulator radiation and high harmonic generation techniques, lead to the creation of beams with non-trivial phase structure, such as a helical phase structure, creating new possibilities for the use of extreme ultraviolet and x-ray photons with orbital angular momentum in probing complex electronic structures in matter. In this article, we review the generation and applications of orbital angular momentum beams in the x-ray and extreme ultraviolet regime. We discuss several recent works that exploit the orbital angular momentum degree of freedom and showcase the potential advantages of using these beams.

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“…Some techniques aim to create helical microbunching through laser-assisted manipulation. [3,4,5,6]. Another route is to create helical microbunching based on harmonic energy modulation in a helical undulator, which is also called high-gain high-mode generation (HGHMG) [7].…”

Section: Introductionmentioning

confidence: 99%

High-gain free-electron laser with orbital angular momentum seeded by an x-ray regenerative amplifier

Sun,

Feng,

Liu

2024

J. Phys.: Conf. Ser.

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High-gain high-mode generation (HGHMG) free-electron laser has been experimentally confirmed to produce vortex light from a relativistic electron beam and is proposed to generate fully-coherent, high-brightness hard x-ray carrying orbital angular momentum at modern free electron laser facilities. However, this requires a coherent x-ray seed laser with sufficient power to perform the helical modulation on the electron beam. In this contribution, we propose a promising scheme to generate a fully coherent x-ray seed laser for the HGHMG system. In this scheme, an x-ray regenerative amplifier is used to offer a fully coherent x-ray seed laser to modulate the electron beam in a helical undulator. With the proposed technique, high-power and high-repetition-rate x-ray with orbital angular momentum can be produced, which will open routes to scientific research in x-ray science.

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Short-wavelength radiation pulses with time-varying orbital angular momentum from tailored relativistic electron beams

Cited by 4 publications

References 28 publications

Extended Field Interactions in Poisson’s Equation Revision

Extended Field Interactions in Poisson’s Equation Revision

Generation and applications of x-ray and extreme ultraviolet beams carrying orbital angular momentum

High-gain free-electron laser with orbital angular momentum seeded by an x-ray regenerative amplifier

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