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DESIGNING AND RESEARCHING OF ORBITRON IONIZATION MANOMETRIC CONVERTER

V. A. Korotchenko, Dr. in technical sciences, full professor, department of electronic devices, RSREU, Ryazan; This email address is being protected from spambots. You need JavaScript enabled to view it.
V. K. Bazylev, PhD (technical sciences), associate professor, department of electronic devices, RSREU, Ryazan; This email address is being protected from spambots. You need JavaScript enabled to view it.
V. E. Skvortsov, General director, LLC MELP; This email address is being protected from spambots. You need JavaScript enabled to view it.
A. M. Zhidkov, post-graduate student, RSREU, Ryazan; This email address is being protected from spambots. You need JavaScript enabled to view it.
T. N. Andreasyan, master student, RSREU, Ryazan; This email address is being protected from spambots. You need JavaScript enabled to view it.

The electrode system was developed, the electric mode was determined, and an experimental sample of ionization manometric converter of orbitron type with low (up to 300 V) anode voltage and high vacuum sensitivity was performed. Using numerical simulation, it was shown that at cathode potentials 10 – 50 V the characteristic values of retention time of electrons in orbitron trap are 0.1 – 1 μs, but there are cases of retention for a long (up to 33 μs) time. Data about mechanism of electron trap formation and electron motion characteristics are presented. It is shown that a steady-state mode of motion occurs approximately after 5 μs. In the interval 5 – 33 μs, the radius of shuttle spiral stabilizes on 6 ± 0.3 mm level, and the energy is 95 ± 7 eV. Single pass time of an electron around an anode is 6.5 ns, the axial oscillations period is 120 ns, lead of a spiral is 4.6 mm, number of rotations is about 5000, path length is about 200 m. The ability of the developed orbitron to record gas pressure in the range 5 – 35 μTorr at average value of orbitron gauge sensitivity is 2200 Torr–1 , which is approximately two orders of magnitude greater than for a widely distributed PMI-2 ionization manometer has been experimentally verified. The aim of the work is to improve ionization vacuum sensors by increasing their manometric sensitivity, reducing the level of gassing in sensors and reducing ionic pumping of gases during the operation of gauges.

Key words: orbitron vacuum sensor, сomputer modelling, motion of electrons.

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