کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
737170 893916 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Direct string magnetic gradiometer for space applications
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Direct string magnetic gradiometer for space applications
چکیده انگلیسی

Recently, a novel direct string magnetic gradiometer (DSMG) has been developed, where a vibrating wire, driven by an AC current, is used as a single sensitive element. It is designed to directly measure the local off-diagonal components of the magnetic gradient tensor, Bxz, Byz and Bxy, provided the distance to an object creating magnetic anomalies is much larger than the length of the string. This requirement is well satisfied in space, if the sensor is deployed from a satellite platform orbiting near the planet under surveillance. Current instruments operating at 1 kPa pressure achieve sensitivity of 4×10−10T/(mHz) in the band 0.0025–0.3 Hz. In this paper we show that proposed modifications to the current gradiometer design, specifically aimed at the deployment in space, could have a magnetic gradient sensitivity better than 10−13T/(mHz) in the frequency range of interest for specific missions both for fundamental research and for such applications as geophysical exploration on Mars and other solar system planets. Also, by combining a few single-axis magnetic gradiometer modules, it is possible to deploy a full tensor magnetic gradiometer.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators A: Physical - Volume 147, Issue 2, 3 October 2008, Pages 529–535
نویسندگان
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