Hysteresis prediction inside magnetic shields and application

Journal Article · Tue Jul 15 00:00:00 EDT 2014 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4890561· OSTI ID:22308964

Morić, Igor ^[1]; De Graeve, Charles-Marie ^[2]; Grosjean, Olivier ^[3]; Laurent, Philippe ^[1]

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1. Observatoire de Paris, SYRTE, Avenue Denfert 77, 75014 Paris (France)
2. SOGETI High Tech, chemin Laporte 3, 31300 Toulouse (France)
3. CNES, Edouard Belin 18, 31400 Toulouse (France)

We have developed a simple model that is able to describe and predict hysteresis behavior inside Mumetal magnetic shields, when the shields are submitted to ultra-low frequency (<0.01 Hz) magnetic perturbations with amplitudes lower than 60 μT. This predictive model has been implemented in a software to perform an active compensation system. With this compensation the attenuation of longitudinal magnetic fields is increased by two orders of magnitude. The system is now integrated in the cold atom space clock called PHARAO. The clock will fly onboard the International Space Station in the frame of the ACES space mission.

• OSTI ID: 22308964
• Journal Information: Review of Scientific Instruments, Vol. 85, Issue 7; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ATOMIC CLOCKS
COMPUTER CODES
DISTURBANCES
HYSTERESIS
INTERNATIONAL SPACE STATION
MAGNETIC FIELDS
SHIELDS