dc.identifier.uri |
http://dx.doi.org/10.15488/4417 |
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dc.identifier.uri |
https://www.repo.uni-hannover.de/handle/123456789/4457 |
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dc.contributor.author |
Bunert, Erik
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dc.contributor.author |
Heptner, Andre
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dc.contributor.author |
Kirk, Ansgar T.
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dc.contributor.author |
Käbein, Oliver
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dc.contributor.author |
Zimmermann, Stefan
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dc.contributor.author |
Kusch, Alexander
|
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dc.contributor.author |
Wurz, Marc Christopher
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dc.date.accessioned |
2019-01-25T11:24:27Z |
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dc.date.available |
2019-01-25T11:24:27Z |
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dc.date.issued |
2017 |
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dc.identifier.citation |
Bunert, E.; Heptner, A.; Kirk, A.T.; Käbein, O.; Zimmermann, S. et al.:
Pulsed electron source for atmospheric pressure chemical ionization in ion mobility spectrometry.
In: 30th International Vacuum Nanoelectronics Conference (IVNC). Piscataway : IEEE, 2017, S.102-103.
DOI: https://doi.org/10.1109/IVNC.2017.8051563 |
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dc.description.abstract |
Ion mobility spectrometers (IMS) are measurement devices for fast and ultra-sensitive trace gas analysis. Most IMS employ radioactive electron sources, such as 3 H or 63 Ni, to provide free electrons with high kinetic energy at atmospheric pressure for initiating a chemical gas phase ionization of the analytes. The disadvantage of these radioactive materials are legal restrictions and the electron emission cannot be adjusted or turned off. Therefore, we developed a non-radioactive electron source and replaced the 3 H-source of our existing IMS, leading to comparable spectra. An advantage of our non-radioactive electron source is that it can operate in a fast pulsed mode. By optimizing the geometric parameters and developing fast control electronics, we can achieve short electron emission pulses with high intensities and adjustable pulse width down to a few nanoseconds. This allows to control the ionization process, which can enhance the analytical performance of the IMS. Furthermore, a miniaturized non-radioactive electron source is desirable, e.g. for hand-held IMS devices. Therefore, we developed an emission current control for field emitter cathodes and investigated their suitability for this application. |
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dc.language.iso |
eng |
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dc.publisher |
Piscataway, NJ : IEEE |
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dc.rights |
Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden. |
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dc.subject |
non-radioacitve electron source |
eng |
dc.subject |
ion mobility spectrometry |
eng |
dc.subject |
APCI |
eng |
dc.subject |
pulsed electron emission |
eng |
dc.subject |
thermionic emission |
eng |
dc.subject |
field emission |
eng |
dc.subject |
emission current control |
eng |
dc.subject.ddc |
621,3 | Elektrotechnik, Elektronik
|
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dc.title |
Pulsed electron source for atmospheric pressure chemical ionization in ion mobility spectrometry |
eng |
dc.type |
ConferenceObject |
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dc.type |
Text |
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dc.relation.essn |
2380-6311 |
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dc.relation.doi |
10.1109/IVNC.2017.8051563 |
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dc.bibliographicCitation.firstPage |
102 |
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dc.bibliographicCitation.lastPage |
103 |
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dc.description.version |
acceptedVersion |
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tib.accessRights |
frei zug�nglich |
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