Analysis of the Impact of the Conic Aperture in the Differentially Pumped Chamber

Authors

  • Jiří Maxa Department of Electrical and Electronic Technology, Faculty of Electrical Engineering and Communication, Brno University of Technology, Czech Republic
  • Pavla Hlavatá Department of Electrical and Electronic Technology, Faculty of Electrical Engineering and Communication, Brno University of Technology, Czech Republic
  • Petr Vyroubal Department of Electrical and Electronic Technology, Faculty of Electrical Engineering and Communication, Brno University of Technology, Czech Republic

DOI:

https://doi.org/10.3849/aimt.01268

Keywords:

ANSYS Fluent, differentially pumped chamber, environmental scanning electron microscope (ESEM), finite volume method, Taylor-Maccoll theory

Abstract

The paper focuses on the simulation of medium dynamics in the environmental scanning electron microscope. In particular, the paper examines the conical aperture location effect in the differentially pumped chamber and the width of the pumping channel in this chamber. The solution is based on the Taylor-Maccoll theory about the impact of the shock wave and was obtained by the use of continuum and finite volume methods in the ANSYS Fluent system.

References

DANILATOS, G. Velocity and Ejector-jet Assisted Differential Pumping: Novel Design Stages for Environmental SEM. Micron, 2011, vol. 43, no. 5, p. 600-611. https://doi.org/10.1016/j.micron.2011.10.023.

VYROUBAL, P., MAXA, J., NEDĚLA, V., JIRÁK, J. and 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.

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.

NEDĚLA, V., TIHLAŘÍKOVÁ, E., RUNŠTUK, V. and HUDEC, J. High-Efficiency Detector of Secondary and Backscattered Electrons for Low-Dose Imaging in the ESEM. Ultramicroscopy, 2018, 184 (Pt A), p. 1-11. https://doi.org/10.1016/j.ultramic.2017.08.003.

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. 54, p. 264-269. https://doi.org/10.1017/S1431927615013483.

NEDĚLA, V., HŘIB, J., HAVEL, L., HUDEC, J. and RUNŠTUK, J. Imaging of Norway Spruce Early Somatic Embryos with the ESEM, Cryo-SEM and Laser Scanning Microscope. Micron, 2016, vol. 84, p. 67-71. https://doi.org/10.1016/j.micron.2016.02.011.

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. 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.

DANĚK, M. Aerodynamics and Flight Mechanics (in Czech). Brno: Akademické nakladatelství CERM, 2009. 293 p. ISBN 978-80-7204-659-1.

HLAVATÁ, P., MAXA, J., BÍLEK, M., LEPLTOVÁ, K. and BAYER, R. Influence of Critical Flow in the Differentially Pumped Chamber QUASEM. Advances in Military Technology, 2017, vol. 12, no. 2, p. 301-310. ISSN 1802-2308. https://doi.org/10.3849/aimt.01201.

HLAVATÁ, P., MAXA, J., BÍLEK, M. and NEDĚLA, V. Impact of the Shape of the Differentially Pumped Chamber on Critical Flow Character. ECS Transaction, 2017, vol. 81, no. 1, p. 317-322. https://doi.org/10.1149/08101.0317ecst.

BÍLEK, M., MAXA, J., HLAVATÁ, P. and BAYER, R. Modelling and Simulation of a Velocity Field Within Supersonic Flow in Low-Pressure Areas. ECS Transaction, 2017, vol. 81, no. 1, p. 311-316. https://doi.org/10.1149/08101.0311ecst.

Downloads

Published

15-06-2019

Issue

Section

Research Paper

Categories

How to Cite

Analysis of the Impact of the Conic Aperture in the Differentially Pumped Chamber. (2019). Advances in Military Technology, 14(1), 151-161. https://doi.org/10.3849/aimt.01268

Similar Articles

1-10 of 153

You may also start an advanced similarity search for this article.