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Zeeman-slower, coil for a zeeman-slower device and method for cooling an atom beam

A Zeeman decelerator, atomic beam technology, applied in electrical components, accelerators, etc., can solve problems such as long processing intervals

Inactive Publication Date: 2009-07-01
SONY DEUT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This limits the atomic flux provided by the Zeeman decelerator, resulting in longer processing intervals if used for deposition

Method used

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  • Zeeman-slower, coil for a zeeman-slower device and method for cooling an atom beam
  • Zeeman-slower, coil for a zeeman-slower device and method for cooling an atom beam
  • Zeeman-slower, coil for a zeeman-slower device and method for cooling an atom beam

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Embodiment Construction

[0031] For effective cooling by the Zeeman retarder, the coil is adapted to provide a magnetic field distribution, and the laser with energy and wavelength provides Zeeman and Doppler misalignment of the atomic beam on part or all of the cross section of the internal channel. During the cooling period, that is, due to the deceleration of the Zeeman effect, the atoms absorb photons from the laser beam. At a certain time t local Later, the atom emits photons, but now in any direction in the 4π environment. Because the direction of the absorbed photon is fully defined, but the direction of the emitted photon is arbitrary, a net change results in a change in the atomic pulse, and therefore a change in the local atomic velocity.

[0032] The laser provides a "blue tuning" with respect to the atom depending on the atom type, which is cooled. For example, about 300MHz tuned to higher frequencies is a perfect value. In the embodiment, the "blue tuning" is between 1 MHz and 1 GHz.

[0033]...

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Abstract

The present invention relates to a Zeeman-slower device, to a coil for such a Zeeman-slower device and to a method for cooling an atom beam. A Zeeman-slower is disclosed having a cooling section (212) comprising an inner passage (230) extending along a longitudinal axis (L), the inner passage (230) having a cross-section perpendicular to the longitudinal axis (L), wherein the area of the cross-section of the inner passage (230) increases monotonously along the longitudinal axis (L) at least in a part of the cooling section (212).

Description

Technical field [0001] The invention relates to a Zeeman-slower, a coil arranged in a Zeeman-slower device, and a method for cooling an atomic beam. Background of the invention [0002] The Zeeman decelerator consists of a coil that produces a longitudinally reduced magnetic field and a laser that reduces the longitudinal velocity of atoms. This effect is also called laser cooling. In order to reduce the lateral velocity of the atoms, another laser device downstream of the coil reduces the lateral velocity of the atoms in one or two lateral directions, thereby providing lateral collimation of the atomic beam. Yoshiteru Kondo et al. published a publication “Influence of the magnetic field gradient on the extraction of slow sodium atoms outside the Japanese Journal of applied physics, Volume 36, Part 1, Issue 2, Pages 905-909 In "solenoid in the Zeeman-slower", a cooling device for cooling the atomic beam is described, in which a Zeeman retarder provides longitudinal deceleration. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05H3/04
CPCH05H3/04
Inventor T·米特瓦G·内尔斯安田章夫S·巴洛彻夫
Owner SONY DEUT GMBH
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