Scientific Results

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

Year: 2019

Authors: Detti A., De Pas M., Duca L., Perego E., Sias C.

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: 023201-1  to: 023201-8

KeyWords: Paul trap
DOI: 10.1063/1.5063305

Citations: 3
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