ISSN:
1573-8620
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Abstract The idea of using the core of a jet of expanding gas to form a molecular beam has led to the construction of complex gasdynamic facilities and has prescribed a number of specific requirements for the creation of high-intensity molecular beams. Two basic requirements are high pumping speed and a skimmer, the first element in the beam-generating system, which does not react appreciably on the jet. The present article gives the results of an experimental investigation of conditions for creating a molecular beam from a jet of carbon dioxide downstream of a sonic nozzle. The position of maximum intensity with room temperature gas in the source is given by the group of variables (P0 d*)0.4. Kn∞. By measuring the intensity and by mass-spectrometric analysis of a molecular beam for specific conditions we have established the CO2 pressure in the stagnation chamber at which condensation begins. The investigations were carried out in a molecular-beam generator with cryogenic pumping.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00858911
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