SKIMMER RECOMMENDATIONS
What skimmer would Beam recommend?
We do not provide specific recommendations for skimmers. As
noted in the skimmer description section of this site, the Model 1 and Model 2
skimmers are believed by Beam to be the best compromise to minimize skimmer
“interference” with the molecular beam.
Do you provide a recommendation between the Model 1 and
Model 2 skimmers?
We suggest using the Model 2 if there is room, because the
greater distance between the skimmer orifice and the mounting bulkhead reduces
possible interference from reflected molecules. This is more important when
using high intensity beams. If the experiment is space constrained, we would
suggest the use of a Model 1 skimmer.
Can you provide a recommendation regarding the use of
your nickel vs. copper skimmers (or nozzles)?
Nickel skimmers will be of higher quality and have a higher
pressure limit. Copper has a lower tensile strength and is more malleable. The
only reasons to use copper rather than a nickel skimmer is to avoid any
ferromagnetism, or if copper is more resistant to oxidation by the specific gas
being used.
Can you provide advice regarding our planned experiment?
No, we do not provide advice on experiments or apparatus.
We suggest a review of the literature and the Atomic and Molecular Beam
Methods references.