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An Experimental Protocol for Femtosecond NIR/UV - XUV Pump-Probe Experiments with Free-Electron Lasers
Published on: October 23, 2018
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Fast pulsed operation of a small non-radioactive electron source with continuous emission current control.
P Cochems1, A T Kirk1, E Bunert1
1Department of Sensors and Measurement Technology, Institute of Electrical Engineering and Measurement Technology, Leibniz University Hannover, Hannover, Germany.
The Review of Scientific Instruments
|July 3, 2015
Summary
This study introduces improved control electronics for non-radioactive electron sources, enabling pulsed electron emission at atmospheric pressure for enhanced control and stability in applications like ion mobility spectrometry.
Area of Science:
- Physics
- Chemistry
- Analytical Instrumentation
Background:
- Non-radioactive electron sources offer advantages over radioactive ones, including better control and fewer regulatory restrictions.
- Previous work established a basic atmospheric pressure electron source design.
Purpose of the Study:
- To develop improved control electronics for atmospheric pressure electron sources.
- To enable pulsed electron emission with enhanced stability and control.
Main Methods:
- Utilized a single control grid within a vacuum housing to focus and defocus the electron beam.
- Developed advanced control electronics to modulate electron emission.
- Integrated the pulsed electron source with an ion mobility spectrometer.
Main Results:
- Achieved pulsed electron emission at atmospheric pressure.
- Demonstrated excellent stability of the emitted electron current during both pulsed and continuous operations.
- Enabled new experimental possibilities in gas phase ion chemistry.
Conclusions:
- The improved control electronics significantly enhance the functionality of non-radioactive electron sources.
- Pulsed electron emission at atmospheric pressure opens avenues for advanced studies in ion chemistry.
- This technology can potentially replace traditional ion shutters in certain analytical instruments.
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