Speaker
Description
Superconducting magnets play a key role in the search for dark matter particles such as axions. This application benefits from a large B2V factor within the magnet bore. A low B field region in close vicinity of the main magnet and a low temperature environment are also required for the detection. Oxford Instruments has developed a range of large bore superconducting magnet systems for dark matter research. We are presenting the design and performance of recent systems.
The 12 T, 320 mm bore, liquid helium bath cooled magnet system, built for the Center for Axion and Precision Physics Research (CAPP) in South Korea, achieves high magnetic energy stored in the microwave cavity within the magnet bore to maximise signal output power. A cancellation coil located above the main magnet enables field-sensitive measurements close to the magnet. The challenges of making such a system are described.
The Proteox™ MX system designed for the Quantum Sensors for the Hidden Sector (QSHS) collaboration in the UK, features a smaller, actively shielded, Cryofree® magnet. This design not only provides a low field region for the readout electronics but also reduces the radial stray field significantly. The integrated dilution refrigerator, which delivers a base temperature below 10 mK, cools down both the electromagnetic resonator and the quantum electronics, greatly improving the signal-to-noise ratio. The advances already made to further developments in dark matter research are described.
| Submitters Country | UK |
|---|
