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Title: Investigation of the on-axis atom number density in the supersonic gas jet under high gas backing pressure by simulation

The supersonic gas jets from conical nozzles are simulated using 2D model. The on-axis atom number density in gas jet is investigated in detail by comparing the simulated densities with the idealized densities of straight streamline model in scaling laws. It is found that the density is generally lower than the idealized one and the deviation between them is mainly dependent on the opening angle of conical nozzle, the nozzle length and the gas backing pressure. The density deviation is then used to discuss the deviation of the equivalent diameter of a conical nozzle from the idealized d{sub eq} in scaling laws. The investigation on the lateral expansion of gas jet indicates the lateral expansion could be responsible for the behavior of the density deviation. These results could be useful for the estimation of cluster size and the understanding of experimental results in laser-cluster interaction experiments.
Authors:
; ; ; ; ;  [1] ;  [2] ;  [3] ;  [3] ;  [4]
  1. School of fundamental studies, Shanghai University of Engineering Science, Shanghai 201620 (China)
  2. Keldysh Institute of Applied Mathematics, Russian Academy of Science, Moscow 125047 (Russian Federation)
  3. Department of Physics & Center for Attosecond Science and Technology(CASTECH), Pohang University of Science and Technology (POTECH), Pohang, Kyungbuk 376-73 (Korea, Republic of)
  4. (Korea, Republic of)
Publication Date:
OSTI Identifier:
22492156
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 5; Journal Issue: 10; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ATOMS; COMPARATIVE EVALUATIONS; DENSITY; EXPANSION; GAS FLOW; JETS; NOZZLES; SCALING LAWS; SUPERSONIC FLOW