Berlin 2001 – scientific programme
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Q: Quantenoptik
Q 17: Poster: Cooling and Trapping
Q 17.11: Poster
Wednesday, April 4, 2001, 12:30–15:00, AT2
Novel design for a magnetic micro-trap for the preparation of one-dimensional quantum gases — •Herwig Ott, Jozsef Fortagh, Gerald Schlotterbeck, Alexander Grossmann, and Claus Zimmermann — Physikalisches Institut, Universität Tübingen, Auf der Morgenstelle 14, D-72076 Tübingen
Using a novel setup we can adiabatically transfer cold atoms from a spheric magnetic quadrupole into a micro-trap and compress the atomic cloud in order to achieve huge collision rates. The magnetic micro-trap consists of 25 mm long parallel Cu conductors at a width of 3 to 30 µm which are electroplated on a Al2O3 substrate. Experimentally, we determined current densities in the conductors which provide magnetic field gradients of up to 5·105 G/cm. Hence, a ratio between the transversal and the longitudinal oscillation frequency of about 100,000 can be attained. The setup complies with ultra-high vacuum requirements and is designed for the generation of a one-dimensional quantum gas.