Electromagnetic trap cooling system with parallel dipole line trap
US10128013B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 2017 |
| Grant date | Nov 13, 2018 |
| Priority date | — |
| Expiry date | Nov 30, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F7/0268
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method, apparatus and system for decreasing random motions of a levitated diamagnetic cylinder is provided. Embodiments of the present invention utilizes a parallel dipole line (PDL) trap system to trap a diamagnetic object. The trap consists of a magnetic parallel dipole line system made of a pair of transversely magnetized (or diametric) cylindrical magnets. A diamagnetic object such as graphite rod can be trapped at the center. The system includes a differential photodetector pair, a differential amplifier, a differentiator, a proportional integral differential (PID) feedback controller and electrode voltage drive system. The feedback control system will minimize the speed of the trapped rod thus lowering its effective temperature. The system can be used to minimize intrinsic noise and enhance the precision in various sensing applications using a parallel dipole line trap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.