Control electronics for a parallel dipole line trap

Patent metadata

Field	Value
Publication number	US-11735343-B2
Application number	US-201916293212-A
Country	US
Kind code	B2
Filing date	Mar 5, 2019
Priority date	Mar 5, 2019
Publication date	Aug 22, 2023
Grant date	Aug 22, 2023

Abstract

Techniques regarding operating one or more parallel dipole line traps are provided. For example, one or more embodiments described herein can comprise a system, which can comprise a parallel dipole line trap comprising a diamagnetic object positioned between a plurality of dipole line magnets. The system can also comprise a split photodetector sensor positioned adjacent to the parallel dipole line trap. The split photodetector sensor can detect a displacement of the diamagnetic object.

First claim

What is claimed is:

1. A system, comprising:
a plurality of electrodes having a plurality of gaps between adjacent ones of the plurality of electrodes;
a plurality of light sources aligned with the plurality of gaps such that a light source of the plurality of light sources is positioned over a gap of the plurality of gaps;
a parallel dipole line trap comprising:
a diamagnetic object positioned between a plurality of dipole line magnets and being at least partially surrounded by the plurality of electrodes, wherein the plurality of electrodes are arranged in a shell configuration at least partially surrounding the diamagnetic object; and

a split photodetector sensor positioned adjacent to the parallel dipole line trap, wherein the split photodetector sensor detects a displacement of the diamagnetic object.

2. The system of claim 1 , wherein the split photodetector sensor comprises:
a light source of the plurality of light sources, wherein the light source is positioned adjacent to a first side of the parallel dipole line trap; and
a plurality of photodetectors positioned adjacent to a second side of the parallel dipole line trap.

3. The system of claim 2 , further comprising:
a processor, operatively coupled to the split photodetector sensor, that determines the displacement based on the light emitted by the light source and detected by the split photodetector sensor.

4. The system of claim 1 , further comprising:
a capacitance sensor connected to the plurality of electrodes and the plurality of dipole line magnets, wherein the capacitance sensor measures a capacitance of the plurality of electrodes.

5. The system of claim 4 , wherein the capacitance of the plurality of electrodes is based on a position of the diamagnetic object between the plurality of electrodes.

6. The system of claim 4 , further comprising:
a processor operatively coupled to the split photodetector sensor and the capacitance sensor, wherein the processor determines a position of the diamagnetic object based on a measurement selected from a group consisting of a differential light detected by the split photodetector sensor and a differential in the capacitance measured by the capacitance sensor.

7. The system of claim 6 , further comprising:
a voltage source connected to the plurality of electrodes.

8. The system of claim 7 , further comprising:
electrode drive circuitry connected to the plurality of electrodes that splits an input drive signal to drive an electrode from the plurality of electrodes.

9. A method, comprising:
projecting light towards a first side of a parallel dipole line trap, wherein the parallel dipole line trap comprises a diamagnetic object levitating between a plurality of dipole line magnets, wherein the plurality of dipole line magnets are at least partially surrounded by a plurality of electrodes arranged in a shell configuration at least partially surrounding the diamagnetic object, wherein the plurality of electrodes comprise a non-magnetic metal, and wherein a plurality of light sources are positioned at opposite sides of the parallel dipole line trap; and
determining a displacement of the diamagnetic object based on a presence of the light at a second side of the parallel dipole line trap.

10. The method of claim 9 , further comprising:
detecting the light at the second side of the parallel dipole line trap by a split photodetector sensor.

11. The method of claim 9 , further comprising:
applying a bias voltage to an electrode of the plurality of electrodes that at least partially surround the diamagnetic object to change an electric potential of the parallel dipole line trap and control the displacement of the diamagnetic object.

12. The method of claim 11 , further comprising:
measuring a capacitance of the parallel dipole line trap, wherein the determining the displacement of the diamagnetic object is further based on the capacitance.

13. The method of claim 9 , further comprising:
splitting an electrical input signal into an electrode drive signal that is directed to an electrode of the plurality of electrodes, wherein the electrode is positioned adjacent to the diamagnetic object.

14. The method of claim 9 , wherein the determining is performed by a processor.

15. A system comprising:
an apparatus comprising:
a plurality of electrodes comprising:
a first plurality of electrodes arranged in a shell configuration; and
a second plurality of electrodes arranged linearly adjacent each one of the first plurality of electrodes, wherein a first gap is between a one of the second plurality of electrodes and a one of the first plurality of electrodes and wherein a second gap is between a second one of the second plurality of electrodes and a second one of the first plurality of electrodes; and

a parallel dipole line trap comprising a diamagnetic object positioned between a plurality of dipole line magnets and being at least partially surrounded by the plurality of electrodes, wherein the plurality of electrodes arranged in the shell configuration is at least partially surrounding the diamagnetic object;
sensory circuitry positioned adjacent to the parallel dipole line trap, and comprising a photodetector to detect a displacement of the diamagnetic object; and

a controller electrically coupled to the apparatus and comprising:
a high voltage converter;
an electrode drive component configured to electrically bias an electrode of the plurality of electrodes;
a split detector component; and
a light drive component.

16. The system of claim 15 , further comprising:
a light source positioned adjacent to a first side of the parallel dipole line trap, wherein the photodetector is a split photodetector positioned adjacent to a second side of the parallel dipole line trap.

17. The system of claim 15 , further comprising:
control circuitry, operatively coupled to the sensory circuitry, and comprising a processor that determines a position of the diamagnetic object based on the displacement.

18. The system of claim 17 , wherein the sensory circuitry further comprises a capacitance sensor to measure a differential capacitance of the plurality of electrodes comprised within the parallel dipole line trap, and wherein the processor determines the position of the diamagnetic object based further on the differential capacitance.

19. The system of claim 18 , further comprising:
electrode drive circuitry, operatively coupled to the parallel dipole line trap, and that supplies a voltage to change an electrostatic potential of the plurality of electrodes.

20. The system of claim 19 , wherein the electrode drive circuitry generates the voltage by splitting an input drive signal and supplies the voltage to an electrode of the plurality of electrodes, wherein the electrode is positioned adjacent to the diamagnetic object.

Assignees

• IBM

Inventors

• Gunawan Oki
• Zhou Wang

Classifications

• H01F7/0273 Primary

  Magnetic circuits with PM for magnetic field generation · CPC title

• H10F77/957 Primary

  for position-sensitive photodetectors, e.g. lateral-effect photodiodes or quadrant photodiodes · CPC title

• G01N27/72

  by investigating magnetic variables · CPC title

• H01L31/02024

  Electricity · mapped topic

• H10K39/30

  Devices controlled by radiation · CPC title