Vladimir Sapunov

Ural Federal University | UrFU · Quantum magnetometry laboratory

Some of the principal experimental and theoretical results concerning metrological parameters of proton and Overhauser magnetometers are studied. In particular, the effect of operating modes, processing algorithms, a sensor design and registration path on the absolute and random errors of geomagnetic field is discussed. The methods of testing and m...

The choice of the signal processing method may improve characteristics of the measuring device. We consider the measurement error of signal processing regression methods for a quasi-harmonic signal generated in a frequency selective device. The results are applied to analyze the difference between the simple period meter processing and regression a...

An Overhauser DNP sensor is described that allows a circularly polarized electron-pump field to be formed in the frequency range of 45-80 MHz that is from 0 zero up tu- 10 Oersted of polarisation field. The component with circular polarization of opposite sign in a working volume of 15 cm3 does not exceed 10-20%. The results of calculation of the f...

The NMR technology is widely used in a proton precession magnetometers of the Earth magnetic field intended for geological and geophysical exploration. The main method used in the devices is the Packard & Varian free precession method. Considerable improvement of the modern proton magnetometers reached by using the Overhauser dynamic nuclear polari...

New vector/scalar Overhauser DNP magnetometers POS-4 for magnetic observatories and directional oil drilling support V.A. Sapunov 1,, A.Y. Denisov 1, S.Y. Khomutov 2, P.А. Borodin 3 , E.D. Narkhov 1, А.V. Sergeev 1, D.N. Milyukov 1, A.N. Shirokov 1, D.V. Saveliev 1 1 Ural Federal University, Quantum Magnetometry Lab., Mira., 21, Ekaterinburg, 62...

A scheme for high–precision absolute measurement of the eclination angle (azimuth) and the modulus of the Earth's magnetic field using nuclear precession magnetometers, with an additional magnetic field bias system for determining the field component, is proposed. A formula for calculating the correction to the declination angle and evaluating the...

Dyatlov Pass is known as the site of the deaths of students in 1959. Earlier reconnaissance was conducted by amateurs, which stimulated the use of a professional MMPOS–2 magnetometer. The results are presented in the report. A location with an elevated magnetic gradient was detected.

Mapping pipelines, bends and branches is possible using high-precision magnetic survey. Using a highly sensitive magnetometer MMPOS, we measured magnetic field from an iron cylinder. The field was approximated by analytical models: a dipole, a rod, a parallelepiped, and a surface model, a set of triangles. We performed a comparison of the experimen...

The results of practical use of a POS-4 vector magnetometer, developed by the Research Laboratory of Quantum Magnetometry, UrFU (Yekaterinburg) and based on POS Overhauser sensors, are presented. Continuous measurements by POS-4 have been carried out at the Paratunka observatory (IKIR FEB RAS, Kamchatka) since 2015, were done at the Saint Petersbur...

The results of practical use of a POS-4 vector magnetometer, developed by the Research Laboratory of Quantum Magnetometry, UrFU (Yekaterinburg) and based on POS Overhauser sensors, are presented. Continuous measurements by POS-4 have been carried out at the Paratunka observatory (IKIR FEB RAS, Kamchatka) since 2015, were done at the Saint Petersbur...

We present comprehensive investigation of Overhauser dynamic nuclear polarization in solutions of the nitroxide radical TANO at high-frequency saturation field of electron paramagnetic resonance transitions with its parallel orientation, related to the static magnetic field up to 0.1 mT. Experimental observation requires specific technique of cycle...

This paper presents a hardware-software solution to the problem of studying and controlling the amplitude-time characteristics of the nuclear precession signal of the working substance of the Overhauser sensors of POS-1 magnetometers. The aspects of development are considered: the technical task for the test bench, the hardware design of the device...

The article discusses the effect of cylindrical shielding shells on the uniformity of the magnetic field created by coil sources used in measures of low-field induction. Calculations were carried out to adjust the parameters of such sources in order to increase the homogeneity of the magnetically shielded system field.

One of the most real factors of geological exploration optimization is low-altitude Earth remote sensing that includes geophysical prospecting methods. This article describes a case of the efficient application of complex low-altitude UAV-based aerogeophysical surveying during greenfield prospecting for gold in greenfield localized in the Western S...

The paper deals with the issues of remote determination of the spatial position of buried pipelines with the help of magnetic survey. This method is economical and does not affect the environment. To achieve the required accuracy of determining the position of the pipelines, it is proposed to use a full gradient multichannel magnetiс system consist...

The report presents marine Overhauser magnetometers developed and produced in the Quantum Magnetometry Lab of the Ural Federal University, Russia. The general design of Overhauser magnetometers and working radical properties are considered. In particular, we discuss a radical used in our land-based and marine magnetometers distinguished by increase...

On September 21-22, 2017 at the Geophysical Observatory Arti, Institute of Geophysics (Ekaterinburg), a intercomparison of scalar magnetometers was carried out. Main tasks were (1) to make an estimation of the systematic error of the absolute scalar magnetometers, using Overhauser scalar magnetometer POS-1 N11 (Quantum Magnetometry Laboratory of Ur...

On September 21-22, 2017 at the Geophysical Observatory "Arti", Institute of Geophysics (Ekaterinburg), a intercomparison of scalar magnetometers was carried out. Main tasks are (1) make an estimation of the systematic error of the absolute scalar magnetometers, using Overhauser scalar magnetometer POS-1 (Quantum magnetometry laboratory of Ural Fed...

Introduction Easy-to-discover deposits in the majority of the world's developed countries is essentially exhausted. Prospects for resource base expansion are often associated with prospecting and exploration works performed at remote and hard-to-get-to sites characterized by complex landscape and morphological conditions. These natural factors make...

We tested the full-gradient magnetometer’s system of two ortho oriented Overhauser with a GPS receiver in shallow water. Our investigations show that this is a promising layout prototype of magnetometer measuring complex, designed for high-precision 3D detecting and studying of underwater man-made objects. With such a system, and the existing set o...

Increased sensitivity and resolution of geophysical instruments significantly enhances the effectiveness of non- destructive investigation methods for standard geological problems and allows new experiments. We suggest to use modern highly sensitive scalar magnetometers for identification and study of geological and artificial low-contrast objects...

Key advantages of using fully graded shooting method are described. The method of detecting position of a pipeline in space by using gradient`s modulus of magnetic field is also presented. The results of expedition to Baidaratskaya Bay, Kara Sea, in which system of 4 Overhauser sensors was used, are reported. The method showed its perspective in se...

Increased sensitivity and resolution of geophysical instruments can significantly enhance the effectiveness of rational non-destructive investigation methods for standard geological problems and carrying out fundamentally new experiments. In particular, the growth in world mineral resources is currently associated with the prospecting and explorati...

This paper covers same results of the research directed at developing an absolute vector proton magnetometer POS-4 based on the switching bias magnetic fields methods. Due to the high absolute precision and stability magnetometer POS-4 found application not only for observatories and to directional drilling support of oi and gas well. Also we discu...

The results of measurements by Overhauser vector magnetometer POS-4 carried out for one year and a half are presented. The accuracy, stability and reliability are evaluated.

A list of Overhauser magnetometers and settings made QMLab - UrFU namely : exploration ground magnetometer MMPOS-1gps and MMPOS-2gps gradiometer, POS-1 of geophysical for magnetic observatories, marine kits SeaPOS, borehole magnetometer LOM-2 having no analogues in the world.

This article provides suggestions and ideas on the use of magnetic observatories to observe the stability of the gyromagnetic ratio of the proton and the electron in order to detect the effects of new fundamental physics and cosmology. The idea consist in long continuous recording of the signals Overhauser and optical pumping K magnetometers. Such...

The method of Overhauser dynamic nuclear polarization (ODNP) is widely applied in analytical chemistry. Usually it is used to strengthen NMR signals, but it is important by itself having a specific sensitivity to various types of spin interactions 1 , in particular, hyperpolarization at spin exchange 2. We developed synthesis method of a stable rad...

The results of two magnetic search explorations (March 2013 and February 2016) conducted by the Research Laboratory of Quantum Magnetometry of Ural Federal University are presented. The search was conducted with the help of MMPOS series high-precision proton NMR Overhauser magnetometer-gradiometer. The aim of the explorations was finding the locati...

The purpose of this paper is to solve two fundamental tasks, i.e., to design the pipeline model with sufficient adequacy and reproducibility, and to solve the inverse problem for the transition from the experimental data on the magnetic field in the measurement area directly to the pipeline characteristics, which are necessary for mapping pipes loc...

The recent LIGO successful proof on existence of the gravitational waves was a major motive of this proposal. In addition the high precision atomic magnetometers can be used for other fundamental research including spin-gravity coupling, tests of Lorentz and CPT violations, detection of dark matter. It is easy to see that many requirements are comp...

The summary results of the analysis of the measurements by Overhauser vector magnetometer POS-4 during about 1.5 years are presented.

Pipeline transportation has already proved to be a high-performance tool of resources transportation for the efficient functioning of modern society. However, an aggressive environment, the modernization of existing pipelines and the building of new pipelines pose a number of problems to be solved for secure exploitation. Such problems include mapp...

University network partnership for development of midget quantum scalar Оverhauser space magnetometer V. Sapunov, S. Kortov, N. Terlyga , Narhov, D. Savelyev, A. Denisov 1Research Laboratory of Quantum Magnetometry Physics and technology institute, 2 Innovation Infrastructure, «Ural state university named after the first President of Russia B.N.Ye...

Presentation of the Overhauser magnetometers promising for micro and nano satellites. The comparison with analogues and a brief description of the operating principle and technical parameters are reported. Sensitivity to 0.02 nT with an absolute accuracy of 0.2 nT in the range of 20,000 - 100,000 nT.

Study of five Chelyabinsk LL5 meteorite fragments using proton high-precision Overhauser magnetometer POS-1 was carried out. Preliminary results demonstrated possibility of this technique to determine magnetic anomaly relation to meteorite fragment's mass as well as remanent magnetization in two fragments. 15 февраля 2013 г. в Челябинской области п...

A method for calculating quality estimation of the magnetic field value measured by proton-precession magnetometers from data of single measurement is presented. This method is appropriate for frequency measurement algorithms which process time-series of signal s zero crossing. Expressions for measurement error estimation are obtained taking into a...

This report covers results of the long-term research directed at developing an absolute vector proton magnetometer based on the switching of bias magnetic fields. The distinctive feature is the attempt of the installation of a miniature Overhauser sensor and optimized Garret solenoid directly on the telescope of the theodolite. Thus this design (De...

The article is devoted to features of modulus magnetic field measurements by means of proton magnetometers. Inertial characteristics of the magnetometers and dynamic errors of variable magnetic field measurements are discussed. Three basic magnetometers averaging algorithms, processing zero crossing times of free precession, are compared. Theoretic...

Since 1987 the Quantum Magnetometry Laboratory (USTU, Ekaterinburg, Russia) produces the magnetometers POS-1 using the processor Overhauser sensor technology (POS -Processor Overhauser Sensor). Magnetometers are used for geology survey, magnetic observatories, seismic and volcanic monitoring, and as first reference standards of weak magnetic field...

The design of a sylphon bellows sensor and the basic circuits of an LC-generator and of a microprocessor unit are presented. An analytical pressure–frequency conversion function and a special method of adjusting the sensor ensure an error of less than 0.05%. The dynamic range is up to 105. The instruments developed cover the ranges 103, 104, and 10...

Creation experience and advantages of the cyclic Overhauser magnetometers with double polarization by magnetostatic and high-frequency magnetic fields (DC-HF OVH magnetometers) are discussed for some geophysical tasks. In particular, DC- HF OVH method provides: · The high sensitivity (0.01-0.05nT) is achievable even for the bottom geomagnetic field...

The systematic and random errors of proton precession geomagnetometers with digital processing by the algorithm of a period meter, a period meter with intracycle processing, and the method of least squares are considered. The analysis explicitly takes into account the effects of the precession signal damping, correlation of noise, and the main para...

A method has been devised for locating pipeline welds with a proton magnetometer from the earth's surface without disrupting the protective covering. A theoretical model is given along with experimental data for an actual pipeline, as well as an algorithm for weld location.

A method has been developed to determine the location of welded joints of pipelines, using a proton magnetometer from the surface of the earth. In this case, there is no destruction of the protective layer of the pipeline. A theoretical model is presented and experimental data for a real pipeline are given. An algorithm for searching the location o...

An NEDR (nuclear electron double resonance) sensor is described that allows a circularly polarized electron-pump field to be formed in the frequency range 45-80 MHz. The component with circular polarization of opposite sign in a working volume of 15 cm3 does not exceed 10-20%. The results of calculation of the field distribution and the effect of t...