Ion-optical calculations are often performed as a first step when designing magnetic systems. As a second step Monte-Carlo simulations are performed of EVaporation Residue (EVR) trajectories through the separator, varying parameters like target thickness, gas pressure and magnet field. Such a program is very useful to optimize all system parameters and to plan and to prepare experiments. The ne...

We follow the time evolution of a superfluid Fermi gas of resonantly interacting ^{6}Li atoms after a phase imprint. Via tomographic imaging, we observe the formation of a planar dark soliton, its subsequent snaking, and its decay into a vortex ring, which, in turn, breaks to finally leave behind a single solitonic vortex. In intermediate stages, we find evidence for an exotic structure resembl...

We study the relaxation dynamics of an isolated zero temperature quasi-two-dimensional superfluid Bose-Einstein condensate that is imprinted with a spatially random distribution of quantum vortices. Following a period of vortex annihilation the remaining vortices self-organize into two macroscopic coherent "Onsager vortex" clusters that are stable indefinitely--despite the absence of driving or...

The time evolution of the ground state wave function of a zero-temperature Bose-Einstein condensate (BEC) gas is well described by the Hamiltonian Gross-Pitaevskii (GP) equation. Using a set of appropriately interleaved unitary collision-stream operators, a qubit lattice gas algorithm is devised, which on taking moments, recovers the Gross-Pitaevskii (GP) equation under diffusion ordering (time...

The interaction of a vortex pair with a premixed flame serves as an important prototype for premixed turbulent combustion. In this study, we investigate the interaction of a counterrotating vortex pair with an initially flat premixed methane flame. We focus on characterizing the mechanical nature of the flame-vortex interaction and on the features of the interaction strongly affected by fuel eq...

As a clean and energy-saving natural gas purification separation device, the supersonic separator's internal gas-liquid mechanism needs to be explored. However, complex three-field (gas, droplet, liquid film) two-phase liquid) condensation flow challenges numerical modeling. Most studies are limited tracking phase droplets ignore effects of film change on water vapor removal. In present study, ...

The numerical calculations of the flowfield in a planar vortex chamber have been performed. The model is based on conservation laws of mass, momentum and energy for nonsteady two-dimensional compressible gas flow in case of swirl axial symmetry. The processes of viscosity, heat conductivity and turbulence have been taken into account. It was found that transition of kinetic energy of gas into h...

Substances in evacuated blood-collection devices produce gas-chromatographic peaks with retention times similar to those of drugs. All tubes tested except the serum separator tubes contained tris(2-butoxyethyl) phosphate, as determined by mass spectrometry. In addition, the partition coefficient during the solvent-extraction step increased for some drugs by as much as 40%, while for other drugs...

Most of our current understanding in nuclear physics has come from using stable targets and beams. Stable nuclei represent only a small fraction of the total nuclei that can exist, but do not exhibit many of the exotic proprieties seen in nuclei far from stability, such as halos [1]. The ability to study unstable nuclei has opened up a vast new range of physics to be explored. The decay of thes...

Here we report the first successful offline test of the cryogenic gas stoping cell developed for the low-energy branch of the Super Fragment Separator (Super-FRS) at FAIR in Darmstadt, Germany. This gas cell has a stopping volume of length 1 m and diameter 0.25 m. A DC field throughout the length of the cell and a RF carpet with DC field superimposed at the exit side to guide the ions towards t...