UDC 543.084.085: 541.12.084.085
INFLUENCE OF INPUT APERTURE SHAPE FOR TRIPOLE MASS ANALYZER ANALYTICAL CHARACTERISTICS
M. V. Dubkov, Dr. in technical sciences, full professor, Head of the Department, RSREU, Ryazan, Russia; orcid.org/0000-0002-5791-0991, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
M. A. Burobin, Ph.D. (in technical sciences), associate professor, RSREU, Ryazan, Russia;
orcid.org/0000-0003-4465-6362, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
V. V. Ivanov, Ph.D. (in technical sciences), associate professor, RSREU, Ryazan, Russia;
orcid.org/0000-0002-5655-0111, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
K. A. Vetshev, postgraduate student, RSREU, Ryazan, Russia;
orcid.org/0009-0000-7789-7520, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
A. D. Vetsheva, postgraduate student, RSREU, Ryazan, Russia;
orcid.org/0009-0004-0215-908x, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
The influence of entrance aperture shape on the analytical characteristics of a tripole mass analyzer is investigated. Numerical modeling of tripole mass analyzer's operation is used to study the influence of en trance aperture's length relative to analyzer's axis on its analytical characteristics. The authors show that varying the entrance aperture's shape improves some of the instrument's parameters. Giving entrance aper ture an oval shape, elongated along OX axis within 0.25 ÷ 0.3 of tripole field radius, results in a 40 % in crease in mass peak intensity, and consequently, signal-to-noise ratio of mass analyzer, with a minor (10 %) change in resolution. Using entrance aperture of a tripole mass analyzer elongated along OY axis leads to minor improvements in the analytical characteristics of tripole within small limits, while further increasing entrance aperture's length along OY axis significantly degrades instrument's resolution. The aim of this work is to study various configurations of input aperture shape in a tripole mass ana lyzer and their influence on its analytical characteristics.
Key words: : tripole mass analyzer, inlet aperture, mass peak, resolution, mass peak intensity.