Journalartikel

Jahr der Veröffentlichung: 1979

Seiten: 137-154

Zeitschrift: International journal of mass spectrometry and ion physics

Bandnummer: 30

Heftnummer: 2

ISSN: 0168-1176

DOI Link: https://doi.org/10.1016/0020-7381(79)80091-1

Verlag: Elsevier Science

Abstract: 

Special ion detectors for mass separators or spectrometers are proposed which reject a large percentage of contaminating ions of the mass m passing the exit slit for mass m_o because of scattering processes in their flight through the vacuum system. Such detectors accept ions only if they lie within a small range of angles of inclination and if they have the correct energy. Since such a detector is absolutely insensitive to ions scattered just behind the ion source and just before the exit slit, a higher rest gas pressure than normal can be tolerated in these regions, as long as a lower rest gas pressure than normal is achieved in the main separator tank, thus reducing rest gas scattering. In addition, with a better pumping geometry the rest gas pressure in the ion acceleration region is able to reduce the number of ions of wrong energy formed by charge exchange processes.

Harvard-Zitierstil: Wollnik, H. (1979) Special ion detectors which reduce the contamination in electromagnetic isotope separators or spectrometers, International journal of mass spectrometry and ion physics, 30(2), pp. 137-154. https://doi.org/10.1016/0020-7381(79)80091-1

APA-Zitierstil: Wollnik, H. (1979). Special ion detectors which reduce the contamination in electromagnetic isotope separators or spectrometers. International journal of mass spectrometry and ion physics. 30(2), 137-154. https://doi.org/10.1016/0020-7381(79)80091-1