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11:45
Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps
Published on: August 17, 2017
Low-energy-spread ion bunches from a trapped atomic gas
M P Reijnders1, P A van Kruisbergen, G Taban
1Department of Applied Physics, Eindhoven University of Technology, P.O Box 513, 5600 MB Eindhoven, The Netherlands.
Physical Review Letters
|March 5, 2009
Summary
We achieved ultracold ion beams with extremely low energy spread, ideal for nanoscale focused ion beam technology and studying beam dynamics.
Area of Science:
- Atomic, Molecular, and Optical Physics
- Ion Beam Technology
- Plasma Physics
Background:
- Focused ion beam (FIB) technology requires precise control over ion beam properties.
- Existing ion sources, like liquid-metal ion sources, have limitations in energy spread.
- Pulsed ultracold ion beams offer potential for advanced applications.
Purpose of the Study:
- To measure the longitudinal energy spread of pulsed ultracold ion beams.
- To evaluate the suitability of these beams for nanoscale focused ion beam applications.
- To investigate space charge effects in low-energy, pulsed ion beams.
Main Methods:
- Time-of-flight measurements of ion beam energy.
- Production of ultracold ion beams via near-threshold ionization of rubidium atoms.
- Utilizing a magneto-optical atom trap for ion beam generation.
Main Results:
- Generation of well-defined pulsed ion beams with 1 eV energy.
- Achieved a root-mean-square energy spread as low as 0.02 eV.
- Demonstrated an energy spread two orders of magnitude lower than gallium liquid-metal ion sources.
Conclusions:
- The ultracold ion beams possess significantly reduced energy spread, enabling sub-nm precision in FIB milling and deposition.
- These beams are well-suited for studying complex space charge dynamics in pulsed ion bunches.
- The study provides a foundation for developing next-generation ion beam sources and applications.
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