Note: Readout of a micromechanical magnetometer for the ITER fusion reactor

Journal Article · Wed May 15 00:00:00 EDT 2013 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4807718· OSTI ID:22118570

Rimminen, H.; Kyynaeraeinen, J. ^[1]

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1. VTT Technical Research Centre of Finland, Tietotie 3, 02150 Espoo (Finland)

We present readout instrumentation for a MEMS magnetometer, placed 30 m away from the MEMS element. This is particularly useful when sensing is performed in high-radiation environment, where the semiconductors in the readout cannot survive. High bandwidth transimpedance amplifiers are used to cancel the cable capacitances of several nanofarads. A frequency doubling readout scheme is used for crosstalk elimination. Signal-to-noise ratio in the range of 60 dB was achieved and with sub-percent nonlinearity. The presented instrument is intended for the steady-state magnetic field measurements in the ITER fusion reactor.

• OSTI ID: 22118570
• Journal Information: Review of Scientific Instruments, Vol. 84, Issue 5; Other Information: (c) 2013 Euratom; 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
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
AMPLIFIERS
CAPACITANCE
ELECTROMECHANICS
ITER TOKAMAK
MAGNETIC FIELDS
MAGNETOMETERS
MICROSTRUCTURE
NONLINEAR PROBLEMS
READOUT SYSTEMS
SEMICONDUCTOR MATERIALS
SIGNAL-TO-NOISE RATIO
STEADY-STATE CONDITIONS