Schematic of a Nier-type ion source. A positive ion beam is …
WEBA Nier-type source ( Fig. 1) ionizes neutral gas molecules by producing a stream of electrons perpendicular to the path of the ion beam. The ionizing chamber (‘ion box’) is held at a high...
Numerical simulations of magnetic electron-impact ion source
WEBAug 1, 2019 · Based on the electron and ion trajectories we have modified the classical Nier-type ion source and found the optimal geometrical and potential parameters to provide better electron ionization and higher ion extraction efficiency.
Numerical simulations of magnetic electron-impact ion source
WEBAug 1, 2019 · One of the most commonly used ion sources in gas mass spectrometers is the Nier-type with ionization produced by electron-impact [2]. This type of source has also been used for Knudsen Effusion Mass Spectrometry where the sample is introduced in the ionization volume by a molecular flow stemming from a Knudsen cell [3].
WEBNier-type ion sources. These and their variants have remained the standard for commercial noble gas mass spectrometers. The efficiency (ions produced per neutral atom introduced into the source) of these ion sources typically ranges from 1 x 10
WEBBased on the electron and ion trajectories we have modified the classical Nier-type ion source and found the optimal geometrical and potential parameters to provide better electron ionization and higher ion extraction efficiency.
Simulated and developed an electron impact ionization source for …
WEBApr 1, 2020 · The most common ionization source of mass spectrometers is the electron impact (EI) ionization source designed by Nier [13], which consists of the ionization chamber, the ion repeller and the ion focusing electrode.
WEBThe atomic level ion source used in the HIM is capable of producing a very high brightness low E ion beam but the available ion species are limited to Helium and Neon. For most of these sources the technical requirements are complex resulting in a large physical size.
WEBIn this study we have characterized a Nier-type electron impact source, a commonly used ionization source in noble gas mass spectrometers (e.g. MAP 215-50, VG Helix SFT, and VG 5400).
1 - Schematic diagram of a Nier-type ion source with a typical ...
WEBDownload scientific diagram | 1 - Schematic diagram of a Nier-type ion source with a typical potential distribution on the electrodes. The extracting plates and beam de fi ning slits are expan-...
Electron Ionization: More Ins and Outs - Spectroscopy Online
WEBOct 1, 2006 · The Nier–Inghram source is widely used with a Knudsen cell for generation of transient reactive species, and Inghram made his own contributions to the field of dating through the study of isotopes. The Nier EI source has been referred to as a "three-electrode source."