Abstract
The Scanning Quantum Cryogenic Atom Microscope (SQCRAMscope) is a quantum sensor in which a quasi-1D quantum gas images electromagnetic fields emitted from a nearby sample. We report improvements to the microscope. Cryogen usage is reduced by replacing the liquid cryostat with a closed-cycle system and modified cold finger, and cryogenic cooling is enhanced by adding a radiation shield. The minimum accessible sample temperature is reduced from 35~K to 5.7~K while maintaining low sample vibrations. A new sample mount is easier to exchange, and quantum gas preparation is streamlined.
Highlights
The Scanning Quantum Cryogenic Atom Microscope (SQCRAMscope) is a scanning probe quantum sensor that combines cryogenics with the techniques of laser cooling and trapping of neutral atoms [1, 2]
An acousto-optic deflector (AOD) moves the focus of the optical dipole trap (ODT) vertically, bringing the atoms approximately 0.9-mm below the atom chip
We found that better heat sinking of the atom chip, as well as the addition of the AOD described above, rendered these wires obsolete
Summary
The Scanning Quantum Cryogenic Atom Microscope (SQCRAMscope) is a scanning probe quantum sensor that combines cryogenics with the techniques of laser cooling and trapping of neutral atoms [1, 2]. It utilizes an ultracold Bose-Einstein condensate (BEC) of atoms to sense fields. The custom radiation shield reduces the radiative heat load on the sample stage while accommodating all necessary optical access and a large range of motion of the sample Together, these modifications enable operation down to 5.7 K, a sixfold improvement in temperature. A closed-cycle cryostat, radiation shield, and heater allow the sample temperature to be tuned from room temperature down to cryogenic temperatures. More detailed descriptions of the cryostat, sample mount, and radiation shield are provided in the following subsections
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
