公开(公告)号：GB2563810B

公开(公告)日：2019-11-27

申请号：GB201817913

申请日：2017-02-14

Applicant: IBM

Inventor： OKI GUNAWAN

IPC: H01F7/02

Abstract: Techniques for tuning magnetic potential using a variable gap in a parallel dipole line (PDL) trap are provided. In one aspect, a PDL trap is provided. The PDL trap includes: a pair of dipole line magnets separated from one another by a variable gap g; and a diamagnetic object levitating above the dipole line magnets. The dipole line magnets can be separated from one another by at least one spacer, or a variable gap fixture can be used in which the dipole line magnets are affixed to separate mounts for varying the gap g between the dipole line magnets. A bigger trap or track can be built with multiple segments of PDL trap. A method of operating a PDL trap is also provided.

公开(公告)号：GB2567384A

公开(公告)日：2019-04-10

申请号：GB201902052

申请日：2017-07-24

Applicant: IBM

Inventor： OKI GUNAWAN ,  YUDISTIRA VIRGUS

IPC: G01V1/16 ,  G01V1/18

Abstract: Parallel dipole line (PDL) trap seismometer and vibration sensors are provided. The seismometer includes: at least one PDL trap having a pair of dipole line magnets, and a diamagnetic object levitating above the dipole line magnets; and a sensing system for determining a position of the diamagnetic object relative to the dipole line magnets and to yield the seismic signal in terms of displacement of acceleration. Methods for sensing vibrations using the present PDL trap seismometer and vibration sensors are provided.

公开(公告)号：GB2553985A

公开(公告)日：2018-03-21

申请号：GB201717263

申请日：2016-03-24

Applicant: IBM

Inventor： OKI GUNAWAN ,  MICHAEL ALBERT PEREIRA

IPC: G01R33/07 ,  G01N27/72

Abstract: A rotating magnetic field Hall apparatus is provided and includes first and second magnets (201, 204) disposed in a master-slave configuration, a device-under-test (DUT) stage (205) interposable between the first and second magnets (201, 204) on which a DUT (2052) is disposable in first or second orientations for Hall measurement or photoelectromagnetic (PEM) testing, respectively, controllers disposed to center the DUT stage (205) between the first and second magnets (201, 204) and orthogonal magnetic field sensors (250, 260) disposed aside lateral sides of the first magnet (201) to facilitate positional initialization of the first and second magnets (201, 204) and to generate in-phase and out-of-phase reference signals for phase-sensitive or lock-in Hall signal detection. The system also includes software system to perform signal processing to yield the final Hall signal.