Continuous loading of a magnetic trap
J. Stuhler, P. O. Schmidt, S. Hensler, J. Werner, J. Mlynek, T. Pfau
Abstract
We have realized a scheme for continuous loading of a magnetic trap (MT). 52Cr atoms are continuously captured and cooled in a magneto-optical trap (MOT). Optical pumping to a metastable state decouples atoms from the cooling light. Due to their high magnetic moment (6 Bohr magnetons), low-field seeking metastable atoms are trapped in the magnetic quadrupole field provided by the MOT. Limited by inelastic collisions between atoms in the MOT and in the MT, we load 108 metastable atoms at a rate of 108 atoms/s below 100 microkelvin into the MT. After loading we can perform optical repumping to realize a MT of ground state chromium atoms.
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