ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
A Campargue-type source of an intense, triply differentially pumped supersonic beam of atoms (He, Ne, Ar) and molecules (N2) for use in high-resolution collision experiments is described. Using stagnation pressures of (1–10) bar, nozzle diameters of (0.05–0.25) mm, and skimmer diameters of (0.5–1.0) mm, the center-line intensity and collimated target density are quantitatively characterized by electron impact ionization in conjunction with total ion collection. Optimum densities in a target plane, located about 160 mm from the nozzle, range from 1012 cm−3 (N2) to 8×1012 cm−3 (He) at background densities which are about 1% of the beam densities. The results are compared with values calculated for ideal supersonic expansions. © 2000 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1319343
Permalink