A battery-powered floating current source of 100 A for precise and fast control of magnetic field
Source abstract
Abstract
In various leading-edge ultracold atom experiments in fields such as quantum simulation, quantum computing, and quantum precision measurement, precise and fast control of the magnetic field is important and a current source with a low noise level and high control bandwidth is required. Conventional commercial current sources, even the expensive ones, may not meet the requirements. Here, we present a battery-powered current source (BPCS) solution that has a maximum output of 100 A with a root-mean-square noise of about only 0.35 mA (integrated from 1 Hz to 3 MHz) and a control bandwidth of about 10 kHz. The large output current is sourced from a lead-acid battery, a fluxgate current sensor is used to detect the output current, and fast feedback regulation is done by using an insulated-gate bipolar transistor under the control of an analog proportional-integral controller. The battery power method eliminates the switching noise. A prepulse method is applied to shorten the settling time when the current steps down from a high level to a low level that is close to zero. These features make the BPCS a suitable analog-controlled floating current source for cold-atom experiments such as the preparation of a single 2D quantum gas and optical lattice atomic clocks.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Cold Atom Physics and Bose-Einstein Condensates · Atomic and Subatomic Physics Research · Advanced Frequency and Time Standards
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics, University of Science and Technology of China 1 , Hefei, Anhui 230026, China
CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics, University of Science and Technology of China 2 , Hefei, Anhui 230026, China
Shanghai Branch, National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China 3 , Shanghai 201315, China
Funding
National Key R&D Program of China · CAS Key Technology Talent Program · Shanghai Municipal Science and Technology Major Project · Foundation for Innovative Research Groups of the National Natural Science Foundation of China
References (31)
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