| Autor: |
Iivanainen, Joonas, Mäkinen, Antti J., Zetter, Rasmus, Zevenhoven, Koos C. J., Ilmoniemi, Risto J., Parkkonen, Lauri |
| Předmět: |
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| Zdroj: |
Journal of Applied Physics; 7/28/2021, Vol. 130 Issue 4, p1-10, 10p |
| Abstrakt: |
Thermal motion of charge carriers in a conducting object causes magnetic field noise that may interfere with sensitive measurements near the object. In this paper, we describe a method to compute the spectral properties of the thermal magnetic noise from arbitrarily shaped thin conducting objects. The method is based on modeling divergence-free currents on a conducting surface using a stream function and calculating the magnetically independent noise-current modes. By doing this, we obtain the power spectral density of the thermal magnetic noise as well as its spatial correlations and frequency dependence. We also describe a numerical implementation of the method and verify it against analytic formulas. We provide the implementation as a part of the free and open-source software package bfieldtools. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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