omegatronn.
/ˈəʊmᵻɡətrɒn/, U.S. /oʊˈmeɪɡəˌtrɑn/, /oʊˈmɛɡəˌtrɑn/ Physics.
A mass spectrometer that employs the principle of the cyclotron to identify and measure gases at very low pressures.A radio-frequency electric field is applied at right angles to a magnetic field so that charged particles having a certain charge-to-mass ratio impinge on a collecting electrode.
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the world > matter > physics > atomic physics > decomposition of light, spectrum > study of spectra > types of spectrometry or spectroscopy > [noun] > analysis of mass > employing cyclotron principle
omegatron1949
1949 J. A. Hipple et al. in Physical Rev. 76 1878/1 Since this device measures ω, it is suggested that it be called the omegatron.
1966 W. Summer tr. E. von Angerer & H. Ebert Physical Lab. Handbk. x. 208 The omegatron..is useful as a gauge down to 10−12 torr.
1975 Nature 6 Feb. 408/2 Partial pressures were measured with an omegatron radio-frequency mass spectrometer which formed part of the UHV section.
2000 Physics of Plasmas 7 4573 The helium is ionized in a hotter region of the edge plasma and is transported to the omegatron.
This entry has been updated (OED Third Edition, March 2004; most recently modified version published online March 2022).
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n.1949