Enhancing the capture velocity of a Dy magneto-optical trap with two-stage slowing
Name
PhysRevA.101.063403.pdf
Description
Published version
Size
823.96 KB
Format
Adobe PDF
Checksum (MD5)
0bd0459a1302d1aa57c7664fe39c77ff
Author(s)
Lunden, William
Du, Li
Cantara, Michael
Barral, Pierre
Jamison, Alan O
Ketterle, Wolfgang
Date Issued
2020
Journal
Physical Review A
Publisher
American Physical Society (APS)
Version
Final published version
Abstract
© 2020 American Physical Society. Magneto-optical traps (MOTs) based on the 626-nm, 136-kHz-wide intercombination line of Dy, which has an attractively low Doppler temperature of 3.3μK, have been implemented in a growing number of experiments over the last several years. A challenge in loading these MOTs comes from their low capture velocities. Slowed atomic beams can spread out significantly during free flight from the Zeeman slower to the MOT position, reducing the fraction of the beam captured by the MOT. Here we apply a scheme for enhancing the loading rate of the MOT wherein atoms are Zeeman slowed to a final velocity larger than the MOT's capture velocity and then undergo a final stage of slowing by a pair of near-detuned beams addressing the 421-nm transition directly in front of the MOT. By reducing the free-flight time of the Zeeman-slowed atomic beam, we greatly enhance the slowed flux delivered to the MOT, leading to more than an order-of-magnitude enhancement in the final MOT population.
MIT Department
Massachusetts Institute of Technology. Research Laboratory of Electronics
MIT-Harvard Center for Ultracold Atoms
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevA.101.063403
