A focussing funnel for metastable helium

G. Labeyrie; A. Browaeys; W. Rooijakkers; D. Voelker; J. Grosperrin; B. Wanner; C. I. Westbrook; A. Aspect

doi:10.1007/s100530050577

A focussing funnel for metastable helium

G. Labeyrie
, A. Browaeys
, W. Rooijakkers
, D. Voelker
, J. Grosperrin
, B. Wanner
, C. I. Westbrook
, A. Aspect

Laboratoire Charles Fabry
University of Sussex
University of Konstanz

Résultats de recherche: Contribution à un journal › Article › Revue par des pairs

6 Citations (Scopus)

Résumé

We have constructed a magneto-optical funnel for He atoms and studied its properties using a laser cooled, highly mono-energetic atomic beam. A simple model of its action allows us to quantitatively understand the observed spot size and "focal length". We show that for a fast beam, the velocity damping coefficient plays an important role in determining the focal length of the device. The observed spot size is limited mainly by transverse heating processes which impose a transverse velocity spread. The device also permits easy scanning of the focussed spot.

langue originale	Anglais
Pages (de - à)	341-350
Nombre de pages	10
journal	European Physical Journal D
Volume	7
Numéro de publication	3
Les DOIs	https://doi.org/10.1007/s100530050577
état	Publié - 1 janv. 1999
Modification externe	Oui

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10.1007/s100530050577

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AU - Labeyrie, G.

AU - Browaeys, A.

AU - Rooijakkers, W.

AU - Voelker, D.

AU - Grosperrin, J.

AU - Wanner, B.

AU - Westbrook, C. I.

AU - Aspect, A.

PY - 1999/1/1

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AB - We have constructed a magneto-optical funnel for He atoms and studied its properties using a laser cooled, highly mono-energetic atomic beam. A simple model of its action allows us to quantitatively understand the observed spot size and "focal length". We show that for a fast beam, the velocity damping coefficient plays an important role in determining the focal length of the device. The observed spot size is limited mainly by transverse heating processes which impose a transverse velocity spread. The device also permits easy scanning of the focussed spot.

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A focussing funnel for metastable helium

Résumé

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