Merged neutral beams

A novel merged beams apparatus to study anion-neutral reactions.

We have developed a novel laboratory instrument for studying gas phase, anion-neutral chemistry. To the best of our knowledge, this is the first such apparatus which uses fast merged beams to investigate anion-neutral chemical reactions. As proof-of-principle we have detected the associative detachment reaction H(-)+H-->H(2)+e(-). Here we describe the apparatus in detail and discuss related tec...

Hydrogen, Anti-hydrogen Beams Production in a Long Linear Vacuum Pipe

This paper presents the possible production of hydrogen and anti-hydrogen from p±and e∓beams merged in a long vacuum chamber (about 2500 m). In such a configuration with a beam kinetic energy for the p±around 100 KeV, the two key parameters are the density of the e∓beam and the temperature of the merged beams. The production rate is computed for several parameter sets and it is shown that it is...

Experimental rate coefficient for dielectronic recombination of neonlike iron forming sodiumlike iron

The rate coefficient for dielectronic recombination (DR) of Ne-like Fe forming Na-like Fe was measured employing the merged electron-ion beams technique at the heavyion storage-ring TSR of the Max-Planck-Institut für Kernphysik in Heidelberg, Germany. In the electron-ion collision energy range of 240–840 eV the merged-beams recombination rate coefficient is dominated by DR associated with 2s 2p...

Measurement of the associative detachment reaction H − + H → H 2 + e − using a merged - beams method

Revisiting the neutral axis in wood beams

For wood beams, it is often assumed that the neutral axis (NA) is located at the centroid of the beam. This would be the case for isotropic and homogeneous materials but these prerequisites are not valid for wood. The varying grain patterns and knots located throughout wood make wood anisotropic and non-homogeneous. Knowledge of the true location of the neutral axis would facilitate a better un...