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Q: Fachverband Quantenoptik und Photonik

Q 25: Poster – Cold Atoms and Molecules, Matter Waves (joint session Q/A/MO)

Q 25.49: Poster

Dienstag, 11. März 2025, 14:00–16:00, Tent

Fast 24-bit analog-to-digital converter for high-precision experiment control — •Jonas Drotleff, Philipp Lunt, Johannes Reiter, Paul Hill, Maciej Gałka, and Selim Jochim — Physikalisches Institut der Universität Heidelberg, Im Neuenheimer Feld 226, 69120 Heidelberg, Germany

Cold atom experiments rely on precision measurements and stable experimental parameters to prepare and control quantum states with high fidelity. High-dynamic range analog-to-digital converters (ADCs) minimize the information loss caused by the digitalization and play a major role in modern experiment control systems. We present a novel measurement device that provides a large dynamic range (19 noise-free bits) at sampling rates of up to 2 million samples per second. At lower sampling rates, the converter yields up to 24 noise-free bits, allowing for enhanced flexibility in the type and bandwidth of input signals. With its small and portable design, the device allows for digitalization close to the signal's origin, thereby eliminating long signal paths and subsequent noise pickup. This ADC is the first step towards more precise control of experimental parameters, with potential applications in the range from ultra-precise stabilization of optical trap depths to magnetic offset field control at unprecedented levels.

Keywords: Electronics; Experiment Control; Magnetic field