Title Gravity, Magnetic and Electromagnetic Gradiometry
Subtitle Strategic Technologies in the 21st Century
Author Alexey V Veryaskin
ISBN 9781681747019
List price USD 55.00
Price outside India Available on Request
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Binding Paperback
No of pages 134
Book size 178 x 254 mm
Publishing year 2018
Original publisher Morgan & Claypool Publishers (Eurospan Group)
Published in India by .
Exclusive distributors Viva Books Private Limited
Sales territory India, Sri Lanka, Bangladesh, Pakistan, Nepal, .
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Gradiometry is a multidisciplinary area that combines theoretical and applied physics, ultra-low noise electronics, precision engineering, and advanced signal processing. All physical fields have spatial gradients that fall with distance from their sources more rapidly than the field strength itself. This makes the gradient measurements more difficult. However, there has been a considerable investment, both in terms of time and money, into the development of various types of gradiometers driven by the extremely valuable type of information that is contained in gradients. Applications include the search for oil, gas, and mineral resources, GPS-free navigation, defence, space missions, medical research, and some other applications.

The author describes gravity gradiometers, magnetic gradiometers, and electromagnetic (EM) gradiometers. The first two types do not require any active sources of the primary physical fields whose gradients are measured, such as gravity field and ambient magnetic field. EM gradiometers do require a primary EM field, pulsed, or sinusoidal, which propagates through media and creates a secondary EM field. The latter one contains information about the non-uniformness of electromagnetically active media such as conductivity and magnetic permeability contrasts. These anomalies are the boundaries of mineral deposits, oil and gas traps, underground water reserves, buried artifacts, unexploded ordnance (UXO), nuclear submarines, and even cancerous human tissue.

This book provides readers with a comprehensive introduction, history, potential applications, and current developments in relation to some of the most advanced technologies in the 21st Century. Most of the developments are strictly controlled by Defence Export Control rules and regulations, introduced in all developed countries that typically require permission to transfer relevant information from one country to another. The book is based on the materials that have been available in public domain such as scientific journals, conferences’ extended abstracts, and online presentations. In addition, medical applications of EM gradiometers are exempt from any control, and some new results relevant to breast cancer early detection research are published in this book for the first time.



From the author

Author biography

Chapter 1. Gravity gradiometry:
Introduction • History and recent developments • Quantum gravity gradiometers • Recent gravity gradiometer developments at Lockheed Martin • Superconducting gravity gradiometers • String (ribbon) gravity gradiometer developments • Conventional absolute gravity gradiometers • MEMS gravity gradiometers • Classification of existing gravity gradiometers • Gravity gradiometry applications • Gravity gradiometry in oil, gas and mineral exploration • Borehole gravity gradiometry • Global positioning system (GPS)-free navigation • Underground tunnels and void detection • Cargo hidden masses detection • Space missions • References

Chapter 2. Magnetic gradiometry:
Introduction • History and recent developments • Direct string magnetic gradiometer developments • Advantages of measuring the magnetic gradients • Magnetic gradiometry applications • Magnetic gradiometry in oil, gas and mineral exploration • Borehole magnetic gradiometry • Space missions • Archaeology • UXO detection • Medical applications • References

Chapter 3. Electromagnetic gradiometry:
Introduction • EM gradiometry in geophysical prospecting • A novel EM gradiometric technique for early detection of breast cancer  • Passive EM gradiometry • References

Chapter 4. Selected topics of gravity, magnetic and electromagnetic gradiometry:
Spatial coordinates and reference frames • Gravity field spatial gradients: representation and properties • Gravity gradient tensor for arbitrary ellipsoid • A simple torsional oscillator in inhomogeneous gravity field • Noise analysis and problems of optimum detection in gravity gradiometry  • Moving-base gradiometry without gradiometers: back to the future  • Electromagnetic gradiometry application examples • References


About the Author:

Alexey V Veryaskin, PhD, is the Director and Founder of Trinity Research Labs, an independent R&D laboratory based at the School of Physics of the University of Western Australia (UWA). He is an Adjunct Professor and a member of the UWA Frequency Standards and Quantum Metrology Group. He received his MSc degree in electronic engineering in 1973 and PhD in Theoretical and Mathematical Physics in 1982. In his early career, he spent 12 years as a research fellow at the Sternberg State Astronomical Institute of the Moscow State University (the Faculty of Physics) specialising in precise gravity measurements. He also was specialising in Superconducting Quantum Interference Devices (SQUIDS) applied to gravimetry and gravity gradiometry. In 1992. he was invited to join a team of researchers at the University of Strathclyde in Glasgow (Scotland, UK) where he was working on a superconducting gravity gradiometer and some aspects of the Satellite Test of Equivalence Principle (STEP), a European space mission. In 1995 he moved to New Zealand where he patented a Direct String Gravity Gradiometer, a technology that attracted a reasonable investment either from private sector or various institutions and government agencies in a number of countries across the globe. He also invented a Direct String Magnetic Gradiometer technology and an Extremely Low Frequency Interferometric System (ELFISHTM), which is a new type of electromagnetic gradiometer. Recently, the ELFISH technology has found its application for breast cancer early-detection research and is currently under development at UWA. Dr Veryaskin moved permanently to Perth (Western Australia) in 2005, and has been working since on various applications of gravity, magnetic, and electromagnetic gradiometry.

Target Audience:

People interested in Physics.

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