I. T. Platzner, K. Habfast, A. J. Walder, and A. Goetz, Modern isotope ratio mass spectrometry, vol.530, pp.978-978, 1997.

A. O. Nier, A Mass Spectrometer for Isotope and Gas Analysis, Rev. Sci. Instrum, vol.18, pp.398-411, 1947.

E. H. Copland and N. S. Jacobson, Measuring thermodynamic properties of metals and alloys with Knudsen Effusion mass spectrometry, p.17245, 2010.

K. Kuhnke, K. Kern, R. David, and G. Comsa, High efficiency molecular beam ionization detector with short ionization region, Rev. Sci. Instrum, vol.65, pp.3458-3465, 1994.

D. A. Dahl, SIMION for the personal computer in reflection, Int. J. Mass Spectrom, vol.200, pp.3-25, 2000.

A. Basak, R. K. Bhati, V. K. Yadav, E. Ravisankar, T. K. Saha et al., An improved ion source for thermal ionization mass spectrometer, Int. J. Mass Spectrom, vol.423, pp.33-38, 2017.

C. Maden, A. Trinquier, A. L. Fauré, A. Hubert, F. Pointurier et al., Design of a prototype thermal ionization cavity source intended for isotope ratio analysis, Int. J. Mass Spectrom, vol.434, pp.70-80, 2018.

A. D. Appelhans, J. E. Olson, D. A. Dahl, and M. B. Ward, High-Efficiency Noble Gas Electron Impact Ion Source for Isotope Separation, 2016.

H. W. Werner, A study of a mass spectrometer ion source by means of computer-calculated ion trajectories, J. Phys. E: Sci. Instrum, vol.7, pp.115-121, 1974.

A. R. Alderwick, A. P. Jardine, H. Hedgeland, D. A. Maclaren, W. Allison et al., Simulation and analysis of solenoidal ion sources, Rev. Sci. Instrum, vol.79, pp.123301-123301, 2008.

C. J. Park and J. R. Ahn, Effect of magnetic field in electron-impact ion sources and simulation of electron trajectories, Rev. Sci. Instrum, vol.77, pp.85107-085107, 2006.

O. Hadjar and W. K. Fowler, High-efficiency cross-beam magnetic electron-impact source for improved miniature Mattauch-Herzog mass spectrometer performance, Rev. Sci. Instrum, vol.83, pp.64101-064101, 2012.

M. Dekieviet, D. Dubbers, M. Klein, U. Pieles, and C. Schmidt, Design and performance of a highly efficient mass spectrometer for molecular beams, Rev. Sci. Instrum, vol.71, pp.2015-2018, 2000.

A. V. Kalinin, L. Yu, J. P. Rusin, and . Toennies, Ion source with longitudinal ionization of a molecular beam by an electron beam in a magnetic field, Instrum. Exp. Tech, vol.49, pp.709-713, 2006.

F. Muntean, Magnetically assisted electron impact ion source for mass spectrometry, US Patent 9, vol.721, pp.777-778, 2017.

J. Drowart, C. Chatillon, J. Hastie, and D. Bonnell, High-Temperature Mass Spectrometry: Instrumental Techniques, Ionization Cross-Sections, Pressure Measurements, and Thermodynamic Data (IUPAC Technical Report), vol.77, pp.683-737, 2005.

R. Weiss, Molecular Beam Electron Bombardment Detector, Rev. Sci. Instrum, vol.32, pp.397-401, 1961.

J. R. Ahn and C. J. Park, Computer simulation of electron and ion trajectories in electronimpaction sources of a quadrupole mass spectrometer, Nucl. Instrum. Methods Phys. Res A, vol.645, pp.345-349, 2011.

G. Caro, B. Bourdon, J. Birck, and S. Moorbath, High-precision 142 Nd/ 144 Nd measurements in terrestrial rocks: Constraints on the early differentiation of the Earth's mantle, Geochim. Cosmochim. Acta, vol.70, pp.164-191, 2006.