Accession Number : AD0837039

Title :   BEAMS OF CONDENSED ATOMS AND MOLECULES IN A HIGH VACUUM (STRAHLEN AUS KONDENSIERTEN ATOMEN UND MOLEKELN IM HOCHVAKUUM),

Corporate Author : AMERICAN METEOROLOGICAL SOCIETY BOSTON MA

Personal Author(s) : Becker, E. W. ; Bier, K. ; Henkes, W.

Report Date : JUL 1964

Pagination or Media Count : 11

Abstract : Under suitable conditions, partial condensation of particles can be achieved during the generation of molecular beams with a Laval nozzle, leading to an unusual increase in beam intensity in a high vacuum. The relative half-value width of the velocity distribution of a condensed argon beam, measured with a transit-time method, turns out to be less than 5%; its upper limit is set only by the resolution of the measuring apparatus. The rise in the velocity of the condensed beam with intake pressure indicates that at least a part of the heat of condensation is converted to ordered mechanical energy in the nozzle. (Author)

Descriptors :   (*LAVAL NOZZLES, MOLECULAR BEAMS), ARGON, CONDENSATION, NITROGEN, PRESSURE, GAS FLOW, COOLANTS, HYDROGEN, LIQUEFIED GASES, PARTICLES, INTENSITY, MANOMETERS, CONDENSATION, THERMODYNAMICS, WEST GERMANY, VACUUM APPARATUS.

Subject Categories : Nuclear Physics & Elementary Particle Physics
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Distribution Statement : APPROVED FOR PUBLIC RELEASE