Ion Trap Electrode Compensation for Constant Radial Frequencies
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Solution Overview
Problem
Existing ion trap devices experience voltage drop along the shuttling path, affecting radial motion frequencies of ions and making it difficult to maintain stable shuttling sequences, and there is a need for scalable solutions to trap a larger number of ions.
Innovation Solution
The device incorporates a structured electrode layer with varying widths and configurations of RF and DC electrodes, along with electronic circuitry to adjust DC voltages based on distance from the RF feeding point, ensuring constant radial frequencies and stable shuttling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RF signals are fed into a feeding point of an ion trap device, then ions can be trapped and controlled, but a voltage drop occurs along the shuttling path affecting radial motion frequencies
Solution Approach 1:
The patent applies local quality by varying the width of RF electrodes and adjusting DC electrode voltages at different positions along the shuttling path. Specifically, RF electrode widths are modified locally to compensate for voltage drops, and DC electrode voltages are adjusted based on their distance from the feeding point, ensuring that radial motion frequencies remain stable throughout the entire shuttling path despite the inherent voltage drop from the feeding point
2Quantity of substance
If ion trap devices are scaled to trap a larger number of ions, then trapping capacity increases, but maintaining stable shuttling sequences becomes more difficult due to voltage drops
Solution Approach 1:
The patent employs parameter changes by systematically varying RF electrode widths and DC electrode voltages along the shuttling path. As the device scales to trap more ions, the electrode geometry parameters (widths) and electrical parameters (voltages) are adjusted according to their position, allowing the device to maintain stable shuttling sequences even when extended to accommodate larger numbers of ions
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration maintains consistent trapping frequencies and stable shuttling of ions, allowing for scalable ion trap devices capable of trapping multiple ions with minimal changes in electrode geometry or electronic architecture.
Implementation Method 1
the structured electrode layer forms multiple electrodes of an ion trap configured to trap ions in a zone above the structured electrode layer
Implementation Method 2
The multiple electrodes comprise a first RF electrode and a second RF electrode extending along a first direction
Implementation Method 3
The multiple electrodes further comprise at least one center DC electrode arranged between the first RF electrode and the second RF electrode
Data Source
Figure 1A~3
Figure 4~6
Figure 7~9
AI summary
A device (300) for controlling trapped ions includes a structured electrode layer, wherein the structured electrode layer forms multiple electrodes of an ion trap configured to trap ions in a zone above the structured electrode layer. The multiple electrodes include a first RF electrode (2A) and a second RF electrode (2B) extending along a first direction. The multiple electrodes further include at least one center DC electrode (6) arranged between the first RF electrode and the second RF electrode and extending along the first direction. A first width of the first RF electrode and a second width of the second RF electrode decrease along the first direction.