A comparison is made between the interaction of electron bunches and intense laser pulses with plasma. The laser pulse is modelled with photon kinetic theory, i.e. a representation of the electromagnetic field in terms of classical quasi-particles with space and wave number coordinates, which enables a direct comparison with the phase space evolution of the electron bunch. Analytical results ar...

Related Articles Homogeneity improvement of field emission beam from metallic nano-tip arrays by noble-gas conditioning Appl. Phys. Lett. 99, 073101 (2011) Analysis of electric field screening by the proximity of two knife-edge field emitters J. Appl. Phys. 110, 034905 (2011) Space charge limited electron flow in two dimensions without magnetic field J. Appl. Phys. 110, 033306 (2011) Electron f...

Related Articles Homogeneity improvement of field emission beam from metallic nano-tip arrays by noble-gas conditioning Appl. Phys. Lett. 99, 073101 (2011) Analysis of electric field screening by the proximity of two knife-edge field emitters J. Appl. Phys. 110, 034905 (2011) Space charge limited electron flow in two dimensions without magnetic field J. Appl. Phys. 110, 033306 (2011) Electron f...

We put forward a concept to create highly collimated, nondispersive electron beams in pseudorelativistic Dirac materials such as graphene or topological insulator surfaces. Combining negative refraction and Klein collimation at a parabolic pn junction, the proposed lens generates beams, as narrow as the focal length, that stay focused over scales of several microns and can be steered by a magne...

This paper deals with the simulation of output beam parameters inverse Compton X-ray Source (ICS). The takes into account main laser and electron beams, such as their pulse shapes, polarization properties well angular energy dispersion electrons. layout presented ICS optical beamline is dedicated to micro-diffraction studies. To maintain axial symmetry beams at different photon energies, monoch...

The charge loss due to initial recombination was measured for various therapy level ionization chamber types. Different methods were applied. Measurements were performed in Co beams, pulsed high-energy photon beams and pulsed high-energy electron beams. The results are mutually consistent within less than 0.05 %. Within this uncertainty initial recombination and diffusion do not depend on the r...

Absolute dosimetry with ionization chambers of the narrow photon fields used in stereotactic techniques and IMRT beamlets is constrained by lack of electron equilibrium in the radiation field. It is questionable that stopping-power ratio in dosimetry protocols, obtained for broad photon beams and quasi-electron equilibrium conditions, can be used in the dosimetry of narrow fields while keeping ...

We study a large ensemble of nuclear spins interacting with a single electron spin in a quantum dot under optical excitation and photon detection. At the two-photon resonance between the two electron-spin states, the detection of light scattering from the intermediate exciton state acts as a weak quantum measurement of the effective magnetic (Overhauser) field due to the nuclear spins. In a coh...

The structure of the photon is studied in photon interactions at high energies using photons radiated by the electron and positron beams at LEP. The current status of these measurements is reviewed.

The stability of the photon beam position on synchrotron beamlines is critical for most if not all synchrotron radiation experiments. The position of the beam at the experiment or optical element location is set by the position and angle of the electron beam source as it traverses the magnetic field of the bend-magnet or insertion device. Thus an ideal photon beam monitor would be able to simul...