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Q: Fachverband Quantenoptik und Photonik

Q 11: Quantum Technologies II

Q 11.3: Vortrag

Montag, 14. März 2022, 17:15–17:30, Q-H13

Argon Trap Trace Analysis - an applied Quantum Technology — •Julian Robertz¹, Yannis Arck², David Wachs^1,2, Florian Meienburg^1,2, Werner Aeschbach^2,3, and Markus Oberthaler¹ — ¹Kirchhoff Institute for Physics, Heidelberg, Germany — ²Institute of Environmental Physics, Heidelberg, Germany — ³Heidelberg Center for the Environment, Heidelberg, Germany

Environmental tracers serve as an important source of information in a wide range of sciences. Due to the low relative abundance of some of these tracers an ultra-sensitive detection technique is necessary. In the case of the environmental tracer ³⁹Ar the Argon Trap Trace Analysis (ArTTA) allows us to measure relative abundances in the range of 10⁻¹⁶. The isotopic shift in the resonance frequency together with multiple resonant scattering processes grants perfect selectivity. Single atoms are captured and identified in a magneto-optical trap (MOT), while the huge background of abundant isotopes remains unaffected.

This ultra-sensitive Quantum Technology was successfully used to study groundwater, lake, ocean and ice samples. Resulting requirements on ArTTA as well as (fundamental) limits will be discussed.