1. Electronic impact source

Nier source mass spectrometers, also known as electron impact mass spectrometers, are used to measure the concentrations and isotopic compositions of elements (H ₂ , CO ₂ , N ₂ , noble gases, etc.). They consist of three distinct elements namely, a source to ionize the gases, a magnetic sector to separate the isotopes according to their m/q ratio and several collectors to transform ionic fluxes into measurable electrical currents (figure 1 ).

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Electronic impact source

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Bibliography

(1) - BURNARD (P.G.), FARLEY (K.A.) - Calibration of pressure-dependent sensitivity and discrimination in Nier-type noble gas ion sources. - Geochemistry Geophysics Geosystems, 1 (1), p. 1-9 (2000).
(2) - MABRY (J.), BURNARD (P.), BLARD (P.H.), ZIMMERMANN (L.) -...