scholarly journals Characterization of an RF excited broad beam ion source operating with inert gases

2021 ◽  
Vol 129 (22) ◽  
pp. 223305
Author(s):  
Erik Rohkamm ◽  
Daniel Spemann ◽  
Frank Scholze ◽  
Frank Frost
Keyword(s):  
Ion Source ◽  
Inert Gases ◽  
Broad Beam

Etch characterization of a broad‐beam electron cyclotron resonance ion source

1990 ◽  
Vol 8 (3) ◽  
pp. 2945-2949 ◽  
Author(s):  
E. Ghanbari ◽  
T. Nguyen ◽  
S. Bui ◽  
E. Ostan
Keyword(s):  
Cyclotron Resonance ◽  
Electron Cyclotron Resonance ◽  
Ion Source ◽  
Electron Cyclotron ◽  
Beam Electron ◽  
Broad Beam

Characterization of reactive broad beam radio-frequency ion source

Vacuum ◽  
1989 ◽  
Vol 39 (5) ◽  
pp. 504
Keyword(s):  
Radio Frequency ◽  
Ion Source ◽  
Broad Beam

Characterization of a modular broad beam ion source

1998 ◽  
Vol 7 (3) ◽  
pp. 252-267 ◽  
Author(s):  
Michael Zeuner ◽  
Horst Neumann ◽  
Frank Scholze ◽  
Dieter Flamm ◽  
Michael Tartz ◽  
...  
Keyword(s):  
Ion Source ◽  
Broad Beam

A new broad-beam alkali ion source for use in ultra high vacuum

1996 ◽  
Vol 7 (6) ◽  
pp. 944-948 ◽  
Author(s):  
Ilija Terzic ◽  
Momcilo M Tosic ◽  
Jovan Elazar
Keyword(s):  
High Vacuum ◽  
Ion Source ◽  
Ultra High Vacuum ◽  
Broad Beam ◽  
Alkali Ion

scholarly journals Characterization of charge separation in the array of Micromachined UltraSonic Electrospray (AMUSE) ion source for mass spectrometry

2009 ◽  
Vol 20 (9) ◽  
pp. 1684-1687 ◽  
Author(s):  
Thomas P. Forbes ◽  
R. Brent Dixon ◽  
David C. Muddiman ◽  
F. Levent Degertekin ◽  
Andrei G. Fedorov
Keyword(s):  
Mass Spectrometry ◽  
Charge Separation ◽  
Ion Source

scholarly journals Characterization of hydrogen plasma in a permanent ring magnet based helicon plasma source for negative ion source research

2019 ◽  
Vol 61 (6) ◽  
pp. 065003 ◽  
Author(s):  
A Pandey ◽  
Debrup Mukherjee ◽  
Dipshikha Borah ◽  
M Bandyopadhyay ◽  
Himanshu Tyagi ◽  
...  
Keyword(s):  
Hydrogen Plasma ◽  
Plasma Source ◽  
Ion Source ◽  
Negative Ion ◽  
Helicon Plasma ◽  
Ring Magnet

scholarly journals Characterization of the mass-dependent transmission efficiency of a CIMS

2016 ◽  
Vol 9 (4) ◽  
pp. 1449-1460 ◽  
Author(s):  
Martin Heinritzi ◽  
Mario Simon ◽  
Gerhard Steiner ◽  
Andrea C. Wagner ◽  
Andreas Kürten ◽  
...  
Keyword(s):  
Mass Spectrometer ◽  
Chemical Ionization ◽  
Transmission Efficiency ◽  
Ion Source ◽  
Mass Discrimination ◽  
Perfluorinated Acids ◽  
Relative Transmission ◽  
The Absolute ◽  
Primary Ions

Abstract. Knowledge about mass discrimination effects in a chemical ionization mass spectrometer (CIMS) is crucial for quantifying, e.g., the recently discovered extremely low volatile organic compounds (ELVOCs) and other compounds for which no calibration standard exists so far. Here, we present a simple way of estimating mass discrimination effects of a nitrate-based chemical ionization atmospheric pressure interface time-of-flight (CI-APi-TOF) mass spectrometer. Characterization of the mass discrimination is achieved by adding different perfluorinated acids to the mass spectrometer in amounts sufficient to deplete the primary ions significantly. The relative transmission efficiency can then be determined by comparing the decrease of signals from the primary ions and the increase of signals from the perfluorinated acids at higher masses. This method is in use already for PTR-MS; however, its application to a CI-APi-TOF brings additional difficulties, namely clustering and fragmentation of the measured compounds, which can be treated with statistical analysis of the measured data, leading to self-consistent results. We also compare this method to a transmission estimation obtained with a setup using an electrospray ion source, a high-resolution differential mobility analyzer and an electrometer, which estimates the transmission of the instrument without the CI source. Both methods give different transmission curves, indicating non-negligible mass discrimination effects of the CI source. The absolute transmission of the instrument without the CI source was estimated with the HR-DMA method to plateau between the m∕z range of 127 and 568 Th at around 1.5 %; however, for the CI source included, the depletion method showed a steady increase in relative transmission efficiency from the m∕z range of the primary ion (mainly at 62 Th) to around 550 Th by a factor of around 5. The main advantages of the depletion method are that the instrument is used in the same operation mode as during standard measurements and no knowledge of the absolute amount of the measured substance is necessary, which results in a simple setup.

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