Graphene Hall sensor is optimized for cryogenic applications

June 04, 2021 // By Rich Pell
Graphene Hall sensor is optimized for cryogenic applications
Graphene-based electronics developer Paragraf has introduced a graphene Hall sensor optimized for cryogenic applications including quantum computing.

The GHS-C Graphene Hall Sensor (GHS) is offered as providing the industry’s only viable approach to measuring magnetic field strengths of 7 Tesla (T) and above at temperature extremes below 3 Kelvin (K). The sensor, says the company, enables commercial organizations to accurately measure high magnetic field strengths at cryogenic temperatures, increasing manufacturing throughput by quicker magnet mapping, replacing existing NMR probe mapping stages.

The cryogenic sensor also allows measurements directly in cold bore, removing the need for room temperature inserts allowing quicker collection of quality data. The sensor is optimized to provide high field measurements while operating at cryogenic temperatures, and, says the company, achieves this while dissipating virtually no heat.

"When looking for high sensitivity, one of the biggest challenges that researchers and engineers working at very low temperatures face is the instability caused by the heat dissipated by conventional sensors," says Ellie Galanis, Product Owner at Paragraf. "This is particularly relevant when working in cryogenic applications, such as quantum computing. Our GHS-C dissipates nanowatts of heat rather than milliwatts. This has a much smaller impact on the apparatus, allowing researchers to make accurate and repeatable measurements."

The GHS-C, says the company, is the only Hall sensor now in volume production that can offer this level of performance at temperatures below 3 K. The underlying technology is capable of operating at temperatures even lower, with no loss of performance. This is made possible by the lack of any planar Hall effect in graphene, a unique feature that the company has harnessed.

The GHS-C uses graphene optimized and tuned for high field applications, including super-conduction, quantum computing, high-energy physics, low-temperature physics, fusion and space. In addition, as the next generation of particle accelerators rely on magnets that generate field strengths more than 16 T, the GHS-C is already drawing interest from leaders in this field, says the company.

The GHS-C is now in volume production and is being supplied

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