Influence of Critical Flow in the Differentially Pumped Chamber AQUASEM
Keywords:Ansys Fluent, differentially pumped chamber, ESEM, SolidWorks
The article deals with the effect of the critical flow, which is examined at pumping of the differential pumping chamber of the Environmental Scanning Electron Microscope (ESEM). The article compares the state of the flow in the area of pumped chamber at
pressure ratio on the apertures when the critical flow occurs and its advantages in design of the chambers versus the flow without the clogging the nozzle. Problematics were solved using finite volume method by Ansys Fluent system.
NEDĚLA, V. Controlled Dehydration of a Biological Sample using an Alternative form of Environmental SEM. Journal of Microscopy, 2010, vol. 237, no. 1, p. 7-11. ISSN 0022-2720.
DANILATOS, G.D. Velocity and Ejector‐jet Assisted Differential Pumping: Novel Design Stages for Environmental SEM. Micron, 2012, vol. 43, no. 5, p. 600-611. https://doi.org/10.1016/j.micron.2011.10.023.
NEDĚLA, V., KONVALINA, I., LENCOVÁ, B. and ZLÁMAL, J. Comparison of Calculated, Simulated and Measured Signal Amplification in Variable Pressure SEM. Nuclear Instruments & Methods in Physics Research Section A, 2011, vol. 645, no. 1, p. 79-83. https://doi.org/10.1016/j.nima.2010.12.200.
ORAL, M., NEDĚLA, V. and DANILATOS, G.D. Dynamic Correction of Higher‐Order Deflection Aberrations in the Environmental SEM. Microscopy and Microanalysis, 2015, vol. 21, no. 4, p. 194-199. https://doi.org/10.1017/S1431927615013367.
NEDĚLA, V., HŘIB, J., HAVEL, L., HUDEC and J., RUNŠTUK, J. Imaging of Norway Sruce Early Somatic Embryos with the ESEM, Cryo‐SEM and Laser Scanning Microscope. Micron, 2016, vol. 84, p. 67-71. ISSN 0968-4328.
NEDĚLA, V., HŘIB, J. and VOOKOVÁ, B. Imaging of Early Conifer Embryogenic Tissues with the Environmental Scanning Electron Microscope. Biologia Plantarum, 2012, vol. 56, no. 3, p. 595-598. ISSN 0006-3134.
TIHLAŘÍKOVÁ, E., NEDĚLA, V. and SHIOJIRI, M. In Situ Study of Live Specimens in an Environmental Scanning Electron Microscope. Microscopy and Microanalysis, 2013, vol. 19, no. 4, p. 914-918. https://doi.org/10.1017/S1431927613000603.
JIRÁK, J., NEDĚLA, V., ČERNOCH, P., ČUDEK, P. and RUNŠTUK, J. Scintillation SE Detector for Variable Pressure Scanning Electron Microscopes. Journal of Microscopy, 2010, vol. 239, no. 3, p. 233-238. ISSN 0022-2720.
NEDĚLA, V., KONVALINA, I., ORAL, M. and HUDEC, J., The Simulation of Energy Distribution of Electrons Detected by Segmental Ionization Detector in High Pressure Conditions of ESEM. Microscopy and Microanalysis, 2015, vol. 21, no. 4, p. 264-269. https://doi.org/10.1017/S1431927615013483.
VYROUBAL, P., MAXA, J., NEDĚLA, V., JIRÁK and J., HLADKÁ, K. Apertures with Laval Nozzle and Circular Orifice in Secondary Electron Detector for Environmental Scanning Electron Microscope. Advances in Military Technology, 2013, vol. 8, no. 1, p. 59-69. ISSN 1802-2308.
DEJČ, M.J. Technical Dynamics of Gases [in Czech]. Prague: SNTL, 1967, 660 p.
ANSYS Inc. ANSYS Web Help – PDF Documentation for Release 15.0 [online]. [cited 2016-05-08]. Available from: <http://188.8.131.52/Ansys/readme.html>.
MAXA, J., BÍLEK, M., HLAVATÁ, P.; VYROUBAL, P. and LEPLTOVÁ, K. Comparisons Using Methods of Continuum Mechanics and Monte Carlo at Differentially Pumped Chamber. Advances in Military Technology, 2016, vol. 11, no. 2, p. 143-150. https://doi.org/10.3849/aimt.01120.
MAXA, J. and NEDĚLA, V. The Impact of Critical Flow on the Primary Electron Beam Passage through Differentially Pumped Chamber. Advances in Military Technology, 2011, vol. 6, no. 1, p. 39-46. ISSN 1802-2308.
MAXA, J., NEDĚLA, V., JIRÁK, J., VYROUBAL, P. and HLADKÁ, K. Analysis of Gas Flow in a Secondary Electron Scintillation Detector for ESEM with a New System of Pressure Limiting Apertures. Advances in Military Technology, 2012, vol. 7, no. 2, p. 39-44. ISSN 1802-2308.
URUBA, V. Turbulence Handbook for Experimental Fluid Mechanics Professionals. Skovlunde: Dantec Dynamic, 2012, 148 p.
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