dorsal/arxiv
View SchemaCompensation of eddy-current-induced magnetic field transients in a MOT
| Authors | Carlos L. Garrido Alzar, Plamen G. Petrov, Daniel Oblak, Joerg H. Mueller, Eugene S. Polzik |
|---|---|
| Categories | |
| ArXiv ID | physics/0701251 |
| URL | https://arxiv.org/abs/physics/0701251 |
Abstract
The design and implementation of a current driver for the quadrupole coil of a magneto-optical trap are presented. The control and the power stages of the driver, both based on a push-pull configuration with high-speed transistors, are separated, allowing for a protection of the control electronics. Moreover, the coil current can be set by an analog voltage, a feature that makes possible both fast and adiabatic switching of the quadrupole magnetic field. In order to compensate magnetic field transients induced by eddy currents, the driver allows a quick reversal of the quadrupole coil current providing in such a way the required magnetic flux compensation. From a fit to the measured magnetic field transients, we have extracted the decay constants which confirm the efficiency of the compensation. Furthermore, we measured the influence of eddy currents on a sample of cold caesium atoms, testing at the same time the ultimate performance of the driver for our applications. The results show that the implemented electronic circuit is able to reduce substantially the transient effects with switching times of the magnetic field below 100 microseconds.
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"date_created": "2026-03-02T18:01:17.875000Z",
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"abstract": "The design and implementation of a current driver for the quadrupole coil of\na magneto-optical trap are presented. The control and the power stages of the\ndriver, both based on a push-pull configuration with high-speed transistors,\nare separated, allowing for a protection of the control electronics. Moreover,\nthe coil current can be set by an analog voltage, a feature that makes possible\nboth fast and adiabatic switching of the quadrupole magnetic field. In order to\ncompensate magnetic field transients induced by eddy currents, the driver\nallows a quick reversal of the quadrupole coil current providing in such a way\nthe required magnetic flux compensation. From a fit to the measured magnetic\nfield transients, we have extracted the decay constants which confirm the\nefficiency of the compensation. Furthermore, we measured the influence of eddy\ncurrents on a sample of cold caesium atoms, testing at the same time the\nultimate performance of the driver for our applications. The results show that\nthe implemented electronic circuit is able to reduce substantially the\ntransient effects with switching times of the magnetic field below 100\nmicroseconds.",
"arxiv_id": "physics/0701251",
"authors": [
"Carlos L. Garrido Alzar",
"Plamen G. Petrov",
"Daniel Oblak",
"Joerg H. Mueller",
"Eugene S. Polzik"
],
"categories": [
"physics.ins-det"
],
"title": "Compensation of eddy-current-induced magnetic field transients in a MOT",
"url": "https://arxiv.org/abs/physics/0701251"
},
"schema_id": "dorsal/arxiv",
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