公开(公告)号：US20220159883A1

公开(公告)日：2022-05-19

申请号：US17307716

申请日：2021-05-04

Applicant: ColdQuanta, Inc.

Inventor： Evan SALIM ,  Hugo LEON

IPC: H05K9/00 ,  G21K1/00

Abstract: A magnetic-field shield is used to shield a magneto-optical trap (MOT) in an ultra-high vacuum (UHV) cell from magnetic fields generated by an ion pump used to maintain the UHV. The magnetic-field shield includes an enclosure of ferro-magnetic material that acts to capture portions of the magnetic field generated by the ion pump. However, as the distance between the ion pump and the MOT is less than 6 centimeters, enough of the magnetic field escapes through the ferro-magnetic material, and this leakage could impair the MOT. A drive magnet attached to the yoke redirects magnetic flux, that would otherwise leak out of the magnetic-field shield, along a path within the ferro-magnetic enclosure and away from the MOT.