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Title: Hysteresis prediction inside magnetic shields and application

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.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [1]
  1. Observatoire de Paris, SYRTE, Avenue Denfert 77, 75014 Paris (France)
  2. (France)
  3. SOGETI High Tech, chemin Laporte 3, 31300 Toulouse (France)
  4. CNES, Edouard Belin 18, 31400 Toulouse (France)
Publication Date:
OSTI Identifier:
22308964
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 85; Journal Issue: 7; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ATOMIC CLOCKS; COMPUTER CODES; DISTURBANCES; HYSTERESIS; INTERNATIONAL SPACE STATION; MAGNETIC FIELDS; SHIELDS