Details
| Original language | English |
|---|---|
| Article number | 065102 |
| Journal | Review of Scientific Instruments |
| Volume | 86 |
| Issue number | 6 |
| Publication status | Published - 5 Jun 2015 |
Abstract
Non-radioactive electron sources are of great interest in any application requiring the emission of electrons at atmospheric pressure, as they offer better control over emission parameters than radioactive electron sources and are not subject to legal restrictions. Recently, we published a simple electron source consisting only of a vacuum housing, a filament, and a single control grid. In this paper, we present improved control electronics that utilize this control grid in order to focus and defocus the electron beam, thus pulsing the electron emission at atmospheric pressure. This allows short emission pulses and excellent stability of the emitted electron current due to continuous control, both during pulsed and continuous operations. As an application example, this electron source is coupled to an ion mobility spectrometer. Here, the pulsed electron source allows experiments on gas phase ion chemistry (e.g., ion generation and recombination kinetics) and can even remove the need for a traditional ion shutter.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Instrumentation
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In: Review of Scientific Instruments, Vol. 86, No. 6, 065102, 05.06.2015.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Fast pulsed operation of a small non-radioactive electron source with continuous emission current control
AU - Cochems, P.
AU - Kirk, A. T.
AU - Bunert, E.
AU - Runge, M.
AU - Goncalves, P.
AU - Zimmermann, S.
PY - 2015/6/5
Y1 - 2015/6/5
N2 - Non-radioactive electron sources are of great interest in any application requiring the emission of electrons at atmospheric pressure, as they offer better control over emission parameters than radioactive electron sources and are not subject to legal restrictions. Recently, we published a simple electron source consisting only of a vacuum housing, a filament, and a single control grid. In this paper, we present improved control electronics that utilize this control grid in order to focus and defocus the electron beam, thus pulsing the electron emission at atmospheric pressure. This allows short emission pulses and excellent stability of the emitted electron current due to continuous control, both during pulsed and continuous operations. As an application example, this electron source is coupled to an ion mobility spectrometer. Here, the pulsed electron source allows experiments on gas phase ion chemistry (e.g., ion generation and recombination kinetics) and can even remove the need for a traditional ion shutter.
AB - Non-radioactive electron sources are of great interest in any application requiring the emission of electrons at atmospheric pressure, as they offer better control over emission parameters than radioactive electron sources and are not subject to legal restrictions. Recently, we published a simple electron source consisting only of a vacuum housing, a filament, and a single control grid. In this paper, we present improved control electronics that utilize this control grid in order to focus and defocus the electron beam, thus pulsing the electron emission at atmospheric pressure. This allows short emission pulses and excellent stability of the emitted electron current due to continuous control, both during pulsed and continuous operations. As an application example, this electron source is coupled to an ion mobility spectrometer. Here, the pulsed electron source allows experiments on gas phase ion chemistry (e.g., ion generation and recombination kinetics) and can even remove the need for a traditional ion shutter.
UR - http://www.scopus.com/inward/record.url?scp=84930958830&partnerID=8YFLogxK
U2 - 10.1063/1.4921707
DO - 10.1063/1.4921707
M3 - Article
AN - SCOPUS:84930958830
VL - 86
JO - Review of Scientific Instruments
JF - Review of Scientific Instruments
SN - 0034-6748
IS - 6
M1 - 065102
ER -