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Diamond-based magnetometer aboard the International Space Station

Yarne Beerden1,2, Boo Carmans1,2, Remy Vandebosch1,2, Dries Hendrikx1, Sam Bammens1, Musa Aydogan1, Siemen Achten1, Jeffrey Gorissen1, Sebastiaan Vanspauwen1 et al.

Siemen Vandervoort1, Teoman Köseoglu1, Jens Mannaerts1, Stijn Jacobs1, Daphne Box1, Milos Nesladek1,2, and Jaroslav Hruby1,2,*

  • 1Hasselt University, Institute for Materials Research (IUMAT), Martelarenlaan 42, B-3500 Hasselt, Belgium
  • 2imec, IUMAT, Wetenschapspark 1, B-3590 Diepenbeek, Belgium

  • *Contact author: jaroslav.hruby@uhasselt.be
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Phys. Rev. Applied 25, 054017 – Published 7 May, 2026

DOI: https://doi.org/10.1103/483m-8hfc

Abstract

Precise mapping of the geomagnetic field is essential for understanding Earth’s geodynamics, space weather interactions, and navigation applications. Traditional magnetometers face limitations in sensitivity for a wide dynamic range, and compactness. To address these challenges, the OSCAR-QUBE quantum magnetometer based on nitrogen-vacancy centers in diamond was developed, providing a sensitive and compact solution for space-based magnetic-field measurements. Our system employs optically detected magnetic resonance to measure magnetic fields utilizing the quantum properties of nitrogen-vacancy centers in a miniaturized design. The form factor of the final device was 1U (10×10×10cm3), weighing 420 g, and had a power consumption of 5 W. Deployed aboard the International Space Station, our magnetometer measured high-resolution magnetic-field maps, achieving a sensitivity of <300nT/Hz and successfully demonstrating in situ vector magnetic-field mapping under low-Earth-orbit conditions. These results validate the flight-proven application of diamond quantum sensing in space, demonstrating the feasibility of solid-state quantum magnetometry for next-generation remote sensing and Earth observation missions. This work lays the foundation for future compact, multisensor quantum payloads for both scientific and commercial space applications.

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Phys. Rev. Applied 25, 054017– Published 7 May, 2026
  • Received 10 September 2025
  • Revised 20 January 2026
  • Accepted 3 March 2026
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