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Focusing of a Rydberg Positronium Beam with an Ellipsoidal Electrostatic Mirror
A C L Jones1, J Moxom1, H J Rutbeck-Goldman1
1Department of Physics and Astronomy, University of California, Riverside, California 92521, USA.
Physical Review Letters
|September 27, 2017
Summary
Researchers developed a novel mirror for slow Rydberg atoms, achieving efficient specular reflection and focusing of positronium beams. This technology enhances atom collection and transport for future experiments.
Area of Science:
- Atomic physics
- Quantum mechanics
- Materials science
Background:
- Slow atoms in Rydberg states can be specularly reflected from surfaces with specific potentials.
- Developing efficient methods for manipulating and focusing atomic beams is crucial for advancements in atomic physics.
Purpose of the Study:
- To construct and test a novel concave mirror for reflecting and focusing slow Rydberg atoms.
- To investigate the focusing properties and efficiency of the constructed mirror for positronium beams.
Main Methods:
- Constructed a concave mirror in the shape of a truncated oblate ellipsoid of revolution.
- Used a beam of n=32 positronium atoms directed towards the mirror in a vacuum pipe.
- Measured the focal length optically and analyzed the focused beam's intensity and spot size.
Main Results:
- The mirror has an optically measured focal length of (1.50±0.01) m.
- Achieved focusing of positronium atoms at a distance of (6.03±0.03) m with an overall reflection efficiency of approximately 30%.
- The focal spot diameter was (32±1) mm (FWHM) and was achromatic over a range of flight times.
Conclusions:
- The constructed mirror effectively reflects and focuses slow Rydberg atoms, demonstrating significant potential for applications in atomic physics.
- The mirror's achromatic nature and high collection efficiency make it a valuable tool for experiments involving slow atom beams.
- This technology can improve the efficiency of collecting, transporting, and imaging slow Rydberg atoms and molecules in various experimental setups.
