A passively pumped vacuum package sustaining cold atoms for more than 200 days

Abstract

Compact cold-atom sensors depend on vacuum technology. One of the major limitations to miniaturizing these sensors are the active pumps -- typically ion pumps -- required to sustain the low pressure needed for laser cooling. Although passively pumped chambers have been proposed as a solution to this problem, technical challenges have prevented successful operation at the levels needed for cold-atom experiments. We present the first demonstration of a vacuum package successfully independent of ion pumps for more than a week; our vacuum package is capable of sustaining a cloud of cold atoms in a magneto-optical trap (MOT) for greater than 200 days using only non-evaporable getters and a rubidium dispenser. Measurements of the MOT lifetime indicate the package maintains a pressure of better than $2\times 10^{-7}$ Torr. This result will significantly impact the development of compact atomic sensors, including those sensitive to magnetic fields, where the absence of an ion pump will be advantageous.

6 pages, 5 figures. (This replacement corrects cross-section value.)

References in corpus (9)

• Measurement of the fine-structure constant as a test of the Standard Model
• Precision Measurement of the Newtonian Gravitational Constant Using Cold Atoms
• An ${}^{27}$Al${}^{+}$ quantum-logic clock with systematic uncertainty below $10^{-18}$
• Absolute absorption on the rubidium D lines: comparison between theory and experiment
• The Feasibility of a Fully Miniaturized Magneto-Optical Trap for Portable Ultracold Quantum Technology
• Laser cooling in a chip-scale platform
• Enhanced observation time of magneto-optical traps using micro-machined non-evaporable getter pumps
• A Low-power Reversible Alkali Atom Source
• Clean, Robust Alkali Sources by Intercalation within Highly-Oriented Pyrolytic Graphite

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