NDLI: MEMS μ-wire magnetic field detection method@CERN

Content Provider	IEEE Xplore Digital Library
Author	Stifter, M. Steiner, H. Hortschitz, W. Sauter, T. Glatzl, T. Dabsch, A. Keplinger, F.
Copyright Year	2015
Description	Author affiliation: Center for Integrated Sensor Syst., Danube Univ. Krems, Wiener Neustadt, Austria (Stifter, M.; Steiner, H.; Hortschitz, W.; Sauter, T.; Glatzl, T.) \|\| Inst. of Sensor & Actuator Syst., Vienna Univ. of Technol., Vienna, Austria (Dabsch, A.; Keplinger, F.)
Abstract	This work reports a novel construction of a micromachined MEMS magnetometer detecting static magnetic fields of CERN's reference dipole with a custom made capacitive read-out. The magnetic flux density is characterized via vibration modes of the MEMS structure which are sensed capacitively. The device consists of a single-crystal silicon clamped-free plate (cantilever) carrying a thin conductor. The cantilever and thin film metal electrodes are separated by a small gap, building a vibrating plate capacitor. Movements of the cantilever are read out conveniently by electronic circuits. A static magnetic field generates a force density acting on the conductor that alternates according to the frequency of the current. By knowing the electrical current, the deflection amplitude of the cantilever is a measure of the component of the magnetic flux density that points perpendicular to the current. The highest vibration amplitudes are expected, of course, in the vicinity of resonance frequencies of the micromachined structure. At ambient pressure the prototype sensor has a measured resonance frequency of 3.8 kHz for the fundamental mode and 20 kHz for the first antisymmetric mode. In experiments, the magnetic flux of the dipole has been characterized between 0.1 and 1 T, with a relative uncertainty of 3·10-4.
Sponsorship	IEEE
Starting Page	1
Ending Page	4
File Size	2294704
Page Count	4
File Format	PDF
e-ISBN	9781479982035
DOI	10.1109/ICSENS.2015.7370244
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-11-01
Publisher Place	South Korea
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	capacitive read-out MEMS μ-wire resonant magnetic field sensor
Content Type	Text
Resource Type	Article

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