| Autor: |
Kolomenskii, Al. A., Jerebtsov, S. N., Stoker, J. A., Scully, M. O., Schuessler, H. A. |
| Předmět: |
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| Zdroj: |
Journal of Applied Physics; Nov2007, Vol. 102 Issue 9, p094902, 7p, 1 Color Photograph, 4 Diagrams, 4 Graphs |
| Abstrakt: |
We employ a Paul-Straubel ring-type electrodynamic trap for studies of single microparticles. Such a trap provides ready access for laser beams to a stored species and is especially suited for scattering and spectroscopic studies of fine particles. We derive the pseudopotential for such a trap and determine the stability regions for confinement of charged particles considering also the viscous force of a buffer medium and the force of gravity. The dynamics of microparticles in such a trap is numerically simulated. The diffraction pattern of light scattered on a polystyrene particle of about 10 μm diameter was registered. For measuring Raman spectra from a single dipicolinic acid microparticle, we used excitation at 488 nm and detection with a fiber optics spectrometer. To improve the collection of light, the trap with the stored particle was placed inside an elliptical mirror. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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