References of "Tokesi, K"
     in
Bookmark and Share    
Full Text
Peer Reviewed
See detailCollisions of slow highly charged ions with surfaces
Burgdoerfer, J.; Lemell, C.; Schiessl, K. et al

in Fainstein, P.D.; Lima, M.A.P.; Miraglia, J.E. (Eds.) et al Photonic, Electronic and Atomic Collisions, Proceedings of the XXIV International Conference (2006)

Progress in the study of collisions of multiply charged ions with surfaces is reviewed with the help of a few recent examples. They range from fundamental quasi-one electron processes to highly complex ... [more ▼]

Progress in the study of collisions of multiply charged ions with surfaces is reviewed with the help of a few recent examples. They range from fundamental quasi-one electron processes to highly complex ablation and material modification processes. Open questions and possible future directions will be discussed. [less ▲]

Detailed reference viewed: 96 (1 UL)
Peer Reviewed
See detailElectron emission from surfaces induced by HCI and lasers
Lemell, C.; Tong, X. M.; Tokesi, K. et al

in Nuclear Instruments & Methods in Physics Research. Section B, Beam Interactions with Materials and Atoms (2005), 235

Electron emission from surfaces due to interaction with charged particles and electromagnetic fields is a topic of research for over 100 years. In the past decade new developments in the production of ... [more ▼]

Electron emission from surfaces due to interaction with charged particles and electromagnetic fields is a topic of research for over 100 years. In the past decade new developments in the production of ultrashort laser pulses (tau < 10 fs at a wavelength of lambda approximate to 750 nm) and of slow highly charged ions (HCI) have rendered these interactions to be remarkably similar. The description of electron emission in HO-surface interactions can therefore be transcribed to model and understand photoemission from surfaces interacting with ultrashort laser pulses. Examples will be presented for two model systems. (c) 2005 Elsevier B.V. All rights reserved. [less ▲]

Detailed reference viewed: 78 (0 UL)
Full Text
Peer Reviewed
See detailAngular distribution of highly charged ions transmitted through metallic microcapillaries
Tokesi, K.; Wirtz, Ludger UL; Lemell, C. et al

in Journal of Electron Spectroscopy & Related Phenomena (2003), 129(2-3), 195-200

The angular distribution of Xe6+ ions with an energy of 800 eV/q transmitted through Ni microcapillaries is studied by a classical trajectory simulation. The results for clean and contaminated by layers ... [more ▼]

The angular distribution of Xe6+ ions with an energy of 800 eV/q transmitted through Ni microcapillaries is studied by a classical trajectory simulation. The results for clean and contaminated by layers of insulating materials of the internal surface of capillary are presented. We show that the angular distributions can be used to identify different phases of hollow ion formation for clean metal surface. We also show that the angular distribution changes dramatically for the case of contaminated surface, i.e. when the image acceleration is depressed. (C) 2003 Elsevier Science B.V. All rights reserved. [less ▲]

Detailed reference viewed: 72 (0 UL)
Peer Reviewed
See detailScattering of highly charged ions at microcapillaries
Tokesi, K.; Wirtz, Ludger UL; Lemell, C. et al

Scientific Conference (2001)

Transmission of highly charged ions through microcapillaries is studied theoretically by a classical trajectory simulation based on the classical-over-the-barrier model. The interaction of highly charged ... [more ▼]

Transmission of highly charged ions through microcapillaries is studied theoretically by a classical trajectory simulation based on the classical-over-the-barrier model. The interaction of highly charged ions with the internal surface of the capillary is treated within the framework of dielectric response theory. We find the resulting charge state distribution of transmitted projectiles in good agreement with measurements. We analyze the angular distributions and the distribution of the mean occupation numbers of n shells of highly charged ions. We also present theoretical results of the energy loss of the highly charged ions undergoing distant collisions at grazing incidence angles with the internal surface of the microcapillary target. [less ▲]

Detailed reference viewed: 44 (0 UL)
Full Text
Peer Reviewed
See detailHollow-ion formation in microcapillaries
Tokesi, K.; Wirtz, Ludger UL; Lemell, C. et al

in Physical Review. A (2001), 64(4),

Transmission of highly charged ions through microcapillaries is studied theoretically by a classical trajectory simulation. The interaction of highly charged ions with the internal surface of the ... [more ▼]

Transmission of highly charged ions through microcapillaries is studied theoretically by a classical trajectory simulation. The interaction of highly charged ions with the internal surface of the capillary is treated within the framework of dielectric-response theory. The simulation is based on the classical over-the-barrier model modified for open cylindrical surfaces. The multielectron evolution and relaxation is taken into account as a stochastic event sequence. We consider N6+ and Ne10+ with an energy of 2.1 keV/amu passing through a metallic microcapillary of Ni. We analyze the distance of closest approach. the angular distribution, and the distribution of the mean occupation numbers of n shells of highly charged ions. We find the resulting charge state distribution of transmitted projectiles in good agreement with recent measurements. Implications for nanotube targets will be discussed. [less ▲]

Detailed reference viewed: 85 (0 UL)
Full Text
Peer Reviewed
See detailCharge-state evolution of highly charged ions transmitted through microcapillaries
Tokesi, K.; Wirtz, Ludger UL; Lemell, C. et al

in Physical Review. A (2000), 61(2),

The charge-state evolution of highly charged ions transmitted through microcapillaries is studied theoretically by a classical trajectory Monte Carlo simulation.: The interaction of highly charged ions ... [more ▼]

The charge-state evolution of highly charged ions transmitted through microcapillaries is studied theoretically by a classical trajectory Monte Carlo simulation.: The interaction of highly charged ions with the internal surface of the capillary is treated within the framework of dielectric response theory. We analyze the distance of closest approach and the angular distributions of the highly charged ions at the exit of the microcapillary. We find the charge-state fraction of transmitted N6+ projectiles, in: good agreement with first measurements. Moreover, our calculations indicate that grazing collisions with the microcapillary surface hold the promise of direct observation of charge transfer and hollow-atom formation at a large distance from the surface. [less ▲]

Detailed reference viewed: 91 (8 UL)
Peer Reviewed
See detailInteraction of highly charged ions with microcapillaries
Tokesi, K.; Wirtz, Ludger UL; Burgdorfer, J.

in PHYSICA SCRIPTA (1999), T80B

The transmission of highly charged ions (HCI) through microcapillaries is investigated. The interaction of an HCI with the internal surface of the capillary is described in terms of a classical image ... [more ▼]

The transmission of highly charged ions (HCI) through microcapillaries is investigated. The interaction of an HCI with the internal surface of the capillary is described in terms of a classical image potential. For Neq+ projectiles transmitted through a Ni capillary the impact parameter distribution and angular distribution of ions leaving the microcapillary is determined. We consider both a narrowly focussed and a dispersive incident beam relative to the acceptance angle of the capillary. Our results are compared with recent experiments. [less ▲]

Detailed reference viewed: 82 (5 UL)
Peer Reviewed
See detailInteraction of highly charged ions with microcapillaries
Tokesi, K.; Wirtz, Ludger UL; Burgdorfer, J.

in Nuclear Instruments & Methods in Physics Research. Section B, Beam Interactions with Materials and Atoms (1999), 154(1-4), 307-311

We analyze the transmission of highly charged ions (HCI) through microcapillaries. The interaction of an HCI with the interval surface of the capillary is treated within the framework of linear response ... [more ▼]

We analyze the transmission of highly charged ions (HCI) through microcapillaries. The interaction of an HCI with the interval surface of the capillary is treated within the framework of linear response. In the limiting case of an ideal conducting cylindrical surface, the interaction reduces to a classical image potential. For Neq+ projectiles transmitting through a Ni capillary calculations for the impact parameter distribution and angular distribution of hollow atoms are presented. We find the fraction of transmitted projectiles which are partially neutralized in good agreement with recent experiments. (C) 1999 Elsevier Science B.V. All rights reserved. [less ▲]

Detailed reference viewed: 81 (0 UL)