UDC 621. 387.322
WIDE-RANGE PRESSURE GAUGE CONVERTER BASED ON ELECTRON SCATTERING GAS MOLECULES
V. K. Bazylev, Ph.D. (Tech.), associate professor, the Department of electronic devices, RSREU, Ryazan, Russia;
orcid.org/0000-0002-3580-3407, e-mail: bazylev.v.k@rsreu
V. A. Korotchenko, Dr. Sc. (Tech.), professor, the Department of electronic devices, RSREU; Ryazan, Russia;
orcid.org/0000-0003-4068-768X, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
A. M. Zhidkov, engineer, the Department of electronic devices, RSREU; Ryazan, Russia;
orcid.org/0000-0002-0199-8402, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
The results of studying wide-range gauge converter based on electron scattering by gas molecules in crossed electric and magnetic fields are presented. The converter is made in the form of a cylindrical magnetron, in which the electron source is located on one of the end electrodes. A tungsten thermocathode or photocathode based on a gallium film, resistant to air at atmospheric pressure, was used as an electron source, which emitted electrons under the action of ultraviolet radiation from LED with wavelength of 265 nm. The pressure measure was the current of electrons scattered by gas molecules and collected by the anode. The electrons that did not experience scattering were captured by a special collector. The results of modeling the motion of electrons in a converter are presented. Experimental dependences of anode current on nitrogen pressure are obtained, which mainly correlate with the calculated ones, correspond to theoretical concepts and confirm the possibility of measuring gas pressure in a wide range from 10-7 Torr to 760 Torr. The aim of the work is to create a pressure gauge converter for pressure range of 10-7 - 760 Torr, based on the scattering of electrons by gas molecules.
Key words: pressure gauge converter, gas pressure, electron scattering, crossed electric and magnetic fields, photocathode, modeling.