Zobrazeno 1 - 10
of 151
pro vyhledávání: '"Knappe, Svenja"'
Robust calibration of vector optically pumped magnetometers (OPMs) is a nontrivial task, but increasingly important for applications requiring high-accuracy such as magnetic navigation, geophysics research, and space exploration. Here, we showcase a
Externí odkaz:
http://arxiv.org/abs/2409.09885
Autor:
Kiehl, Christopher, Menon, Thanmay S., Hewatt, Dawson P., Knappe, Svenja, Thiele, Tobias, Regal, Cindy A.
Publikováno v:
Phys. Rev. Applied 22, 014005 (2024)
We demonstrate how to measure in situ for heading errors of optically pumped magnetometers (OPMs) in the challenging parameter regime of compact vapor cells with imperfect optical pumping and high buffer gas pressure. For this, we utilize microwave-d
Externí odkaz:
http://arxiv.org/abs/2310.11017
Rabi measurements in atomic vapor cells are of current interest in a range of microwave imaging and sensing experiments, but are increasingly in a parameter space outside of theoretical studies of coherence defined by spin-exchange collisions. Here,
Externí odkaz:
http://arxiv.org/abs/2208.00120
A study of scalar optically-pumped magnetometers for use in magnetoencephalography without shielding
Publikováno v:
Physics in Medicine and Biology, vol 66 175030, Sept 2021
Scalar optically-pumped magnetometers (OPMs) are being developed in small packages with high sensitivities. The high common-mode rejection ratio of these sensors allows for detection of very small signals in the presence of large background fields ma
Externí odkaz:
http://arxiv.org/abs/2105.02316
Autor:
Robinson, Stephen E., Andonegui, Amaia Benitez, Holroyd, Tom, Hughes, K. Jeramy, Alem, Orang, Knappe, Svenja, Maydew, Tyler, Griesshammer, Andreas, Nugent, Allison
Publikováno v:
In NeuroImage 15 November 2022 262
Autor:
Sheng, Dong, Perry, Abigail R., Krzyzewski, Sean P., Geller, Shawn, Kitching, John, Knappe, Svenja
Publikováno v:
Appl. Phys. Lett. 110, 031106 (2017)
We report on the development of a microfabricated atomic magnetic gradiometer based on optical spectroscopy of alkali atoms in the vapor phase. The gradiometer, which operates in the spin-exchange relaxation free regime, has a length of 60 mm and cro
Externí odkaz:
http://arxiv.org/abs/1701.03236
We demonstrate an optically pumped $^{87}$Rb magnetometer in a microfabricated vapor cell based on a zero-field dispersive resonance generated by optical modulation of the $^{87}$Rb ground state energy levels. The magnetometer is operated in the spin
Externí odkaz:
http://arxiv.org/abs/1404.0374
Autor:
Zentile, Mark A, Andrews, Rebecca, Weller, Lee, Knappe, Svenja, Adams, Charles S, Hughes, Ifan G
Publikováno v:
J. Phys. B: At. Mol. Opt. Phys. 47, 075005 (2014)
We investigate experimentally and theoretically the Faraday effect in an atomic medium in the hyperfine Paschen-Back regime, where the Zeeman interaction is larger than the hyperfine splitting. We use a small permanent magnet and a micro-fabricated v
Externí odkaz:
http://arxiv.org/abs/1401.1659
Autor:
Jimenez-Martinez, Ricardo, Kennedy, Daniel J., Rosenbluh, Michael, Donley, Elizabeth A., Knappe, Svenja, Seltzer, Scott J., Ring, Hattie L., Bajaj, Vikram S., Kitching, John
Optically hyperpolarized $^{129}$Xe gas has become a powerful contrast agent in nuclear magnetic resonance (NMR) spectroscopy and imaging, with applications ranging from studies of the human lung to the targeted detection of biomolecules. Equally att
Externí odkaz:
http://arxiv.org/abs/1401.0068
Autor:
Weller, Lee, Kleinbach, Kathrin S., Zentile, Mark A., Knappe, Svenja, Adams, Charles S., Hughes, Ifan G.
Publikováno v:
J. Phys. B: At. Mol. Opt. Phys. 45 215005 (2012)
Here we report on measurements of the absolute absorption and dispersion properties of an isotopically pure 87Rb vapour for magnetic fields up to and including 0.6 T. We discuss the various regimes that arise when the hyperfine and Zeeman interaction
Externí odkaz:
http://arxiv.org/abs/1208.1879