dorsal/arxiv
View SchemaFocusing a fountain of neutral cesium atoms with an electrostatic lens triplet
| Authors | Juris G. Kalnins, Jason M. Amini, Harvey Gould |
|---|---|
| Categories | |
| ArXiv ID | physics/0603127 |
| URL | https://arxiv.org/abs/physics/0603127 |
| DOI | 10.1103/PhysRevA.72.043406 |
| Journal | Phys. Rev. A72, 043406 (2005) |
Abstract
An electrostatic lens with three focusing elements in an alternating-gradient configuration is used to focus a fountain of cesium atoms in their ground (strong-field-seeking) state. The lens electrodes are shaped to produce only sextupole plus dipole equipotentials which avoids adding the unnecessary nonlinear forces present in cylindrical lenses. Defocusing between lenses is greatly reduced by having all of the main electric fields point in the same direction and be of nearly equal magnitude. The addition of the third lens gave us better control of the focusing strength in the two transverse planes and allowed focusing of the beam to half the image size in both planes. The beam envelope was calculated for lens voltages selected to produced specific focusing properties. The calculations, starting from first principles, were compared with measured beam sizes and found to be in good agreement. Application to fountain experiments, atomic clocks, and focusing polar molecules in strong-field-seeking states is discussed.
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"abstract": "An electrostatic lens with three focusing elements in an alternating-gradient\nconfiguration is used to focus a fountain of cesium atoms in their ground\n(strong-field-seeking) state. The lens electrodes are shaped to produce only\nsextupole plus dipole equipotentials which avoids adding the unnecessary\nnonlinear forces present in cylindrical lenses. Defocusing between lenses is\ngreatly reduced by having all of the main electric fields point in the same\ndirection and be of nearly equal magnitude. The addition of the third lens gave\nus better control of the focusing strength in the two transverse planes and\nallowed focusing of the beam to half the image size in both planes. The beam\nenvelope was calculated for lens voltages selected to produced specific\nfocusing properties. The calculations, starting from first principles, were\ncompared with measured beam sizes and found to be in good agreement.\nApplication to fountain experiments, atomic clocks, and focusing polar\nmolecules in strong-field-seeking states is discussed.",
"arxiv_id": "physics/0603127",
"authors": [
"Juris G. Kalnins",
"Jason M. Amini",
"Harvey Gould"
],
"categories": [
"physics.acc-ph",
"physics.atom-ph"
],
"doi": "10.1103/PhysRevA.72.043406",
"journal_ref": "Phys. Rev. A72, 043406 (2005)",
"title": "Focusing a fountain of neutral cesium atoms with an electrostatic lens triplet",
"url": "https://arxiv.org/abs/physics/0603127"
},
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