We demonstrate the use of cylindrical vector beams - beams with spatially varying polarization - for detecting and preparing the spin of a warm rubidium vapor in a spatially dependent manner. We show that a modified probe vector beam can serve as an atomic spin analyzer for an optically pumped medium, which spatially modulates absorption of the beam. We also demonstrate space-variant atomic spi...

We report on measurement of momentum transfer to an atomic sodium beam by a standingwave laser field. Experiments were performed in two regimes: 1) the regime in which spontaneous emission is negligible; and 2) the regime in which the effects of spontaneous decay dominate the momentum transfer process. In the first regime, we observe diffraction of the atomic beam: the near-resonant Kapitza-Dir...

It has recently become possible to focus a beam of high-energy electrons to a spot smaller than an atom, with vast potential for the study of condensed matter. We devise an experiment that can image, with subangstrom resolution, the distribution of such an electron beam as it scatters within an atomic lattice. Our experiments reveal the acute sensitivity of the scattered electron distribution t...

the effect of evaporation rate on structural, morphological and optical properties of electron beam evaporated cds thin films have been investigated. cds thin film deposited by electron beam evaporation method in 12nm/min and 60nm/min evaporation rates on glass substrates. x-ray diffraction, scanning electron microscopy, uv-vis-nir spectroscopy and atomic force microscopy were used to character...

Stochastic cooling of trapped atoms is considered for a laser-beam configuration with beam waists equal or smaller than the extent of the atomic cloud. It is shown, that various effects appear due to this transverse confinement, among them heating of transverse kinetic energy. Analytical results of the cooling in dependence on size and location of the laser beam are presented for the case of a ...

We report on the experimental investigation of two-particle correlations between neutral atoms in a Hanbury Brown and Twiss experiment. Both an atom laser beam and a pseudo-thermal atomic beam are extracted from a Bose-Einstein condensate and the atom flux is measured with a single atom counter. We determine the conditional and the unconditional detection probabilities for the atoms in the beam...

The SPARC-EBIT (fig.1) is an Electron Beam Ion Trap (from DREEBIT, Dresden) that will be used for tests and offline measurements, firstly for HITRAP, and later for SPARC (Stored Particle Atomic physics Research Collaboration). In the EBIT the ions are produced by electron impact ionisation of gas atoms by an intense electron beam. The magnetic field of a permanent magnet arrangement focuses the...

Manifestation of channeling effects in quantitative interpretation of atomic-resolution measurements made using scanning transmission electron microscope (STEM) has been observed in imaging and spectroscopic data [1-3]. Here, channeling refers to the path of the electron beam along atomic columns in a crystal. A feature common among STEM probe path in crystals of many different elemental compos...

A high-density ultracold spin polarized atomic hydrogen jet’ will be used as an internal target for the experiments NEPTUN and NEPTUN-A,2 which will study spin effects in proton-proton scattering at energies of 400 GeV and 3 TeV at the UNK accelerator being built at Protvino, USSR. The ultimate intensity goaI of this jet is a polarized beam of 10” atoms/s. In order to keep the vacuum pressure i...

2014 An atomic beam source for negative polarized lithium ions is operated at the Heidelberg EN-Tandem since 1974. A highly efficient surface ionizer is used. Vector and tensor polarized beams of 6Li (I = 1) and 7Li (I = 3/2) have been produced with currents up to 150 nA of Li3+ at the target. The second rank tensor polarization of both beams is calibrated absolutely. Preliminary results of pro...