Mathematical Physics Analysis of Nozzle Shaping at the Gas Outlet from the Aperture to the Differentially Pumped Chamber in Environmental Scanning Electron Microscopy (ESEM) [PDF]
SensorsA combination of experimental measurement preparations using pressure and temperature sensors in conjunction with the theory of one-dimensional isentropic flow and mathematical physics analyses is presented as a tool for analysis in this paper ...
Tomáš Binar +2 more
exaly +7 more sources
Impact of Supersonic Flow in Scintillator Detector Apertures on the Resulting Pumping Effect of the Vacuum Chambers [PDF]
Sensors, 2023 The article describes the combination of experimental measurements with mathematical–physics analyses in flow investigation in the chambers of the scintillator detector, which is a part of the environmental scanning electron microscope.
Jiří Maxa +3 more
doaj +2 more sources
The Effect of Surface Roughness on Supersonic Nozzle Flow and Electron Dispersion at Low Pressure Conditions [PDF]
SensorsThis study investigates supersonic flow within a nozzle under low-pressure conditions at the continuum mechanics boundary. This phenomenon is commonly encountered in applications such as the differentially pumped chamber of an Environmental Scanning ...
Pavla Šabacká +4 more
doaj +2 more sources
Application of a Total Pressure Sensor in Supersonic Flow for Shock Wave Analysis Under Low-Pressure Conditions [PDF]
SensorsThis study examines the design and implementation of a sensor developed to measure total pressure in supersonic flow conditions using nitrogen as the working fluid.
Michal Bílek +8 more
doaj +2 more sources
Sensors, 2021 Pumping in vacuum chambers is part of the field of environmental electron microscopy. These chambers are separated from each other by a small-diameter aperture that creates a critical flow in the supersonic flow regime.
Pavla Šabacká +2 more
exaly +3 more sources
Slip Flow Analysis in an Experimental Chamber Simulating Differential Pumping in an Environmental Scanning Electron Microscope. [PDF]
Sensors (Basel), 2022 This paper describes the combination of experimental measurements with mathematical–physical analysis during the investigation of flow in an aperture at low pressures in a prepared experimental chamber. In the first step, experimental measurements of the pressure in the specimen chamber and at its outlet were taken during the pumping of the chamber ...
Šabacká P +4 more
europepmc +4 more sources
The Impact of Nozzle Opening Thickness on Flow Characteristics and Primary Electron Beam Scattering in an Environmental Scanning Electron Microscope [PDF]
SensorsThis paper describes the methodology of combining experimental measurements with mathematical–physics analyses in the investigation of flow in the aperture and nozzle.
Jiří Maxa +8 more
doaj +2 more sources
Absolute Electron Scattering Cross Sections for the CF2 Radical [PDF]
, 2008 Using a crossed electron-molecular beam experiment, featuring a skimmed nozzle beam with pyrolytic radical production, absolute elastic cross sections for electron scattering from the CF2 molecule have been measured.
Carl Winstead +7 more
core +2 more sources
Central-field intermolecular potentials from the differential elastic scattering of H2(D2) by other molecules [PDF]
, 1973 Differential elastic scattering cross sections for the systems H2+ O2, SF6, NH3, CO, and CH4 and for D2+ O2, SF6, and NH3 have been obtained from crossed beam studies.
Coggiola, Michael J. +2 more
core +1 more source
A multifunctional beamline chamber featuring diagnostic devices, differential pumping, and laser alignment for endstation optics [PDF]
AIP Conference Proceedings, 2019 The design of a compact chamber incorporating multiple functions for a soft X-ray beamline at Taiwan Photon Source is described. This chamber installed to assist the commissioning of the beamline is composed of three major parts: a diagnostic system, an alignment system and a differential pumping system. The capability of the diagnostic system includes
Yi-Jr Su +6 more
openaire +1 more source