Promises and challenges of high-energy vortex states collisions

Иванов, И. П.

doi:10.1016/j.ppnp.2022.103987

Cited by 38 publications

(11 citation statements)

References 222 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The possible experiments with vortex muons, hadrons, ions, etc. are being discussed [8,27,28,37,38,44,[47][48][49][50][51][52] (see the recent review [53]), whereas the non-relativistic twisted atoms and molecules have been generated only recently [54]. However, the available diffraction techniques [26,[30][31][32]55] are not applicable for relativistic energies, which severely limits the development of the matter waves physics.…”

Section: Introductionmentioning

confidence: 99%

Generation of vortex particles via generalized measurements

et al. 2022

View full text Add to dashboard Cite

The hard X-ray twisted photons and relativistic massive particles with orbital angular momentum – vortex electrons, muons, protons, etc. – have many potential applications in high-energy and nuclear physics. However, such states can be obtained so far mainly via diffraction techniques, not applicable for relativistic energies. Here we show that the vortex states of different particles, including hadrons, ions, and nuclei, can be generated in a large class of processes with two final particles simply by altering a postselection protocol. Thanks to entanglement and to the uncertainty relations, an evolved state of a final particle becomes twisted if the momentum azimuthal angle of the other particle is measured with a large uncertainty. We give several examples, including Cherenkov and undulator radiation, particle collisions with intense laser beams, $$e\mu \rightarrow e\mu , ep \rightarrow ep$$ e μ → e μ , e p → e p . This technique can be adapted for ultrarelativistic lepton and hadron beams of linear colliders, and it can also facilitate the development of sources of X-ray and $$\gamma $$ γ -range twisted photons at storage rings and free-electron lasers.

show abstract

Section: Introductionmentioning

confidence: 99%

Generation of vortex particles via generalized measurements

et al. 2022

View full text Add to dashboard Cite

show abstract

“… – 7 In the short wavelength range, optical vortices are promising means to trigger new phenomena through light–matter interaction 8 – 10 X-ray beams carrying OAM have been proposed for research in quadrupolar X-ray dichroism experiments, 11 photoionization experiments, 12 resonant inelastic X-ray scattering, 13 and magnetic helicoidal dichroism 14 , 15 . Most recently, a new type of phase dichroism has been demonstrated to probe the real-space configuration of the antiferromagnetic ground state with X-ray beams carrying OAM 16 .…”

Section: Introductionmentioning

confidence: 99%

Self-seeded free-electron lasers with orbital angular momentum

Yan

Geloni

2023

Adv. Photon. Nexus

View full text Add to dashboard Cite

X-ray beams carrying orbital angular momentum (OAM) are an emerging tool for probing matter. Optical elements, such as spiral phase plates and zone plates, have been widely used to generate OAM light. However, due to the high impinging intensities, these optics are challenging to use at X-ray free-electron lasers (XFELs). Here, we propose a self-seeded free-electron laser (FEL) method to produce intense X-ray vortices. Unlike passive filtering after amplification, an optical element will be used to introduce the helical phase to the radiation pulse in the linear regime, significantly reducing thermal load on the optical element. The generated OAM pulse is then used as a seed and significantly amplified. Theoretical analysis and numerical simulations demonstrate that the power of the OAM seed pulse can be amplified by more than two orders of magnitude, reaching peak powers of several tens of gigawatts. The proposed method paves the way for high-power and high-repetition-rate OAM pulses of XFEL light.

show abstract

“…Studies on the potential applications of vortex beams (both optical and electron vortex beams) have increased over the past two decades, and thorough literature is available for both beams [1][2][3][4][5][6]. Electron vortex beams (EVBs, also termed as "twisted electron beams" or "Bessel beams") represent experimentally realizable, freely propagating beams carrying a welldefined orbital angular momentum (OAM) about their propagation axis.…”

Section: Introductionmentioning

confidence: 99%

Dynamics of twisted electron impact ionization of CH4 and NH3 molecule

Dhankhar¹,

Neha²,

Choubisa³

2023

Preprint

View full text Add to dashboard Cite

Electron vortex beams (EVB, also known as twisted electron beams) possess an intrinsic orbital angular momentum (OAM) with respect to their propagation direction. This intrinsic OAM represents a new degree of freedom that provides new insights into investigating the dynamics of electron impact ionization. In this communication, we present, in the first-Born approximation (FBA), the angular profiles of the triple differential cross-section (TDCS) for the (e, 2e) process on CH 4 and NH 3 molecular targets in the coplanar asymmetric geometry. We compare the TDCS of the EVB for different values of OAM number m with that of the plane wave. For a more realistic scenario, we investigate the average TDCS for macroscopic targets to explore the influence of the opening angle θ p of the twisted electron beam on the TDCS. In addition, we also present the TDCS for the coherent superposition of two EVBs. The results demonstrate that the twisted (e, 2e) process retrieves the p-type character of the molecular orbitals, which is absent in the plane wave TDCS for the given kinematics. The results for the coherent superposition of two Bessel beams show the sensitivity of TDCS towards the OAM number m.

show abstract

Promises and challenges of high-energy vortex states collisions

Cited by 38 publications

References 222 publications

Generation of vortex particles via generalized measurements

Generation of vortex particles via generalized measurements

Self-seeded free-electron lasers with orbital angular momentum

Dynamics of twisted electron impact ionization of CH4 and NH3 molecule

Contact Info

Product

Resources

About