Hannover 2016 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 42: Poster: Quantum Optics and Photonics III

Q 42.27: Poster

Mittwoch, 2. März 2016, 16:30–19:00, Empore Lichthof

A Fast Multichannel Signal Generator for Segmented Ion Traps — •Vidyut Kaushal, Heinz Lenk, Kilian Singer, Ferdinand Schmidt-Kaler, and Ulrich Poschinger — QUANTUM, Institut für Physik, Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany

Modern segmented ion traps require hardware for individual real-time control of the segment voltages, with stringent requirements on signal integrity and sampling rate. We present the functional design of a fast multichannel, arbitary waveform generator, which supports up to 80 independent analog output channels. The device reaches a maximum analog update rate of 3.9 million samples/s for all channels simultaneously. Additionally, the delay between consecutive samples can be controlled in steps of 20 ns, resolving typical trap oscillation periods - a crucial feature for the control of fast shuttling operations [1,2]. The output voltage range of ± 40 V allows for tight confinement of trapped ions and compensation of signal distortion.

We describe the architecture of the device in detail and present a thorough characterization of the relevant signal characteristics, such as slew rate, long-time stability, nonlinearities, glitch impulse areas and output noise. We also discuss future extensions towards a complete real-time control system including feedback capbilities.

[1] A. Walther et al., PRL 109, 080501 (2012)

[2] T. Ruster et al., PRA 90, 033410 (2014)