Active stabilization of ion trap radiofrequency potentials
US10262849B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 4, 2018 |
| Grant date | Apr 16, 2019 |
| Priority date | — |
| Expiry date | Jun 4, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/422
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed are improved methods and structures for actively stabilizing the oscillation frequency of a trapped ion by noninvasively sampling and rectifying the high voltage RF potential at circuit locations between a step-up transformer and a vacuum feedthrough leading to the ion trap electrodes. We use this sampled/rectified signal in a feedback loop to regulate the RF input amplitude to the circuit. By employing techniques and structures according to the present disclosure we are advantageously able to stabilize a 1 MHz trapped ion oscillation frequency to <10 Hz after 200 s of integration, representing a 34 dB reduction in the level of trap frequency noise and drift, over a locking bandwidth of up to 30 kHz.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.