A compact radiofrequency drive based on interdependent resonant circuits for precise control of ion traps

Year: 2019

Authors: Detti Amelia; De Pas Marco; Duca Lucia; Perego Elia; Sias Carlo

Autors Affiliation: Univ Firenze, Dipartimento Fis & Astron, Via G Sansone 1, I-50019 Sesto Fiorentino, Italy; Ist Nazl Ric Metrol, Str Cacce 91, I-10135 Turin, Italy; European Lab Nonlinear Spect, Via N Carrara 1, I-50019 Sesto Fiorentino, Italy; Politecn Torino, Corso Duca Abruzzi 24, I-10129 Turin, Italy; CNR, INO, Via N Carrara 1, I-50019 Sesto Fiorentino, Italy.

Abstract: Paul traps are widely used to confine electrically charged particles like atomic and molecular ions by using an intense radiofrequency (RF) field, typically obtained by a voltage drop on capacitative electrodes placed in vacuum. We present a RF drive realized on a compact printed circuit board and providing a high-voltage RF signal to a quadrupole Paul trap. The circuit is formed by using four interdependent resonant circuits – each of which is connected to an electrode of a Paul trap – fed by low-noise amplifiers, leading to an output voltage of peak-to-peak amplitude up to 200 V at 3.23 MHz. The presence of a single resonant circuit for each electrode ensures a strong control on the voltage drop on each electrode, e.g., by applying a DC field through a bias tee. Additionally, the moderate quality factor Q = 67 of the resonant circuits ensures a fast operation of the drive, which can be turned on and off in less than 10 mu s. Finally, the RF lines are equipped with pickups that sample the RF in phase and amplitude, thus providing a signal that can be used to actively control the voltage drop at the trap’s electrodes. (C) 2019 Author(s).

Journal/Review: REVIEW OF SCIENTIFIC INSTRUMENTS

Volume: 90 (2)      Pages from: 023201  to: 023201

More Information: This work was supported by the ERC-Starting Grant PlusOne (Grant Agreement No. 639242), the SIR grant ULTRACOLDPLUS (Grant No. RBSI14GNS2), the FARE grant UltraCrystals (Grant No. R165JHRWR3), and the European Metrology Programme for Innovation and Research (EMPIR) Project No. 17FUN07 (CC4C). This project has received funding from the EMPIR programme co-financed by the Participating States and from the European Union?s Horizon 2020 Research and Innovation programme.
KeyWords: Transformer; Ion-trap; Rectifier; Electronic circuits; RLC circuit; Ferromagnetic materials; Paul trap
DOI: 10.1063/1.5063305

Citations: 5
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