A new tandem mass spectrometer for photofragment spectroscopy of cold, gas-phase molecular ions
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A review, with 9 refs., is given on trace element anal. by mass spectrometry (MS) and potentiometric stripping anal. (PSA). The key question of the problem is detn. of the structure of the samples (i.e. distribution functions and concns. of atoms, mols., c ...
Particle formation has been investigated experimentally from the initial molecular precursors up to the final micron-sized particles in a low pressure silane rf capacitive discharge. Neutrals and ions were studied by quadrupole mass spectrometry in power-m ...
The time-resolved fluxes of negative polysilicon hydride ions from a power-modulated rf silane plasma have been measured by quadrupole mass spectrometry and modeled using a simple polymerization scheme. Experiments were performed with plasma parameters sui ...
Ion cyclotron modes excited in a low density, cylindrical plasma cavity using an external inductive antenna are investigated theoretically and experimentally. These modes, which have a long parallel wavelength, exhibit a strong electrostatic character and ...
Methods and spectrometers for carrying out ion-cyclotron-resonance spectrometry are described in which a pulse sequence is employed which is described by P1-t1-P2-Tm-P3-t2, (P1, P2, and P3 are radio-frequency pulses, with P1 and P2 having the same frequenc ...
Trace contaminants in sputter atmospheres (10(-2) mbar Ar) are determined with a mass spectrometer whose ionizer is directly exposed to the process pressure, whereas the quadrupole filter is kept at high vacuum. The background limitations inherent to conve ...
In this paper we present the first results obtained with a plasma ion mass spectrometer in the boundary of the TEXTOR tokamak. Measurements were made several days after TEXTOR was boronised. Comparisons are made with results obtained in DITE under similar ...