... The model accurately represents the total magnetospheric magnetic field for conditions of low magnetic activity and to a geocentric distance of 15 ...

Magsat, designed for making measurements of the geomagnetic vector field, is evaluated. For accurate

... of the NUC tower which accurately ... RESEARCH FACILITIES, TOWERS, SHALLOW WATER ... RESEARCH, OFFSHORE STRUCTURES, GRADIENTS ...

... The instrument is suitable for absolute and relative measurements of ... for gauging of other less accurate instruments for measuring magnetic fields ...

Magnetic Forming Studies. The use of transient high magnetic-field devices has made possible the generation of very large accurately ...

A magnetometer utilizing magnetic resonance techniques is designed for measuring weak fields quickly and accurately. The apparatus is especially suitable for determining local variations of the earth's magnetic field, as in geophysical prospecting from an airplane. (D.L.C.)

... CYCLES, REDUCTION, FLIGHT, DATA REDUCTION, DIFFUSION, DISKS, TRANSFER, SEXTANTS, BALLOONS, MAGNETIC FIELDS, FINES ...

The periodic size effect in pure single crystal gallium plates is applied to high field calibration and particularly to accurate differential measurements of high magnetic fields. A simple rf probe is described which is used to measure the characteristics...

A magnetic susceptibility logging system has been developed which is relatively stable under normal field logging conditions and which produces logs that accurately represent in situ variations in magnetic susceptibility. However, both field and laborator...

The use of magnetic fields to control and steer assistive and operative devices is increasing in minimally invasive surgical applications. The design of the magnetic link between an external permanent magnet, maneuvered by an industrial robot, and a robotic laparoscopic camera was investigated in this paper, with ...

Two methods for measuring the Earth's magnetic field are described. In the former, according to Gauss, the Earth's magnetic field is compared with that of a permanent magnet; in the latter, a well-known method, the comparison is made with the magnetic ...

The magnetic field is the easiest tool for determining the momentum of a particle through its trajectory and, the more accurate the knowledge of the magnetic field, the more accurate the particle momentum determination. This simple fact explains why more and more particle ...

Due to stringent requirements on the spatial harmonic content of ISABELLE's magnetic field, the magnet power supplies for the half-cell prototype must be dynamically accurate and stable to within 0.01% of their full-scale rating. Depending on the applicat...

Analytical expressions of the torque on cuboidal permanent magnets are given. The only hypothesis is that the magnetizations are rigid, uniform, and perpendicularly oriented. The analytical calculation is made by replacing magnetizations by distributions of magnetic charges on the magnet poles. ...

Methodology to estimate the depth and diameter of steel rebars is presented using information obtained from scans generated by a magnetic field imaging camera (mFIC). It has generated accurate dimensional information to a depth of 10 cm.

A simplified electrolytic tank has been constructed that serves as a relatively easy and reasonably accurate analog method of designing a magnetic field configuration to be used in a plasma containment device. The current density in the electrolyte is dir...

The transport of charged particle beams requires magnetic fields that must be shaped correctly and very accurately. During the last 20 years or so, many studies have been made, both analytically and through the use of computer programs, of various magneti...

Developments in permanent magnet materials such as alnicos, rare-earth cobalts and ferrites have brought in their wake new interest in their application to the design of electrical machinery, torque couplers, lifting magnets, and other electromechanical devices. In all these cases, the magnetic field provides the ...

A quantitative model of the magnetospheric magnetic field and associated procedures for accurately cataloging charged-particle data out to and beyond geosynchronous orbit is developed. The magnetic field model incorporates all major magnetospheric current systems and is valid for all tilt ...

Penning traps have proven to be powerful tools for the determination of nuclear masses with high accuracy. A crucial parameter for precision mass measurements in Penning traps is the accurate determination of the magnetic-field strength. However, the magnetic field of a superconducting magnet ...

Oct 5, 1998 ... NRL magnetic flux tube image "Very accurate measurements are needed to tell how much energy is stored in the field." Davis said. ...

Research is presented on temperature sensitive liquid crystal designed to meet the need for a measuring device to accurately measure temperature and temperature distribution in the presence of electric, magnetic, and sonic fields, especially with high spa...

Radio scintillation observations from two or more sites provide accurate measurements of solar wind velocity. Regions of rotated magnetic field produce a ...

Measure magnetic field vector to 0.5 nano Tesla. " Gravity science. Obtain Doppler accurate to 50 microns/s with 60-s integration periods ...

The electrical resistance of the Kondo system Cu95Au5-Fe, similar to Cu-Fe, has been measured in magnetic fields to 50 kG in the temperature range 0.4-100 K. The presence of the gold constituent reduces the normal magnetoresistance effects to negligible values, and field depreciation of the Kondo state can be ...

An alternative method is developed to compute the magnetic field from a circular cylindrical magnetic source. Specifically, a Fourier series expansion whose coefficients are toroidal functions is introduced which yields an alternative to the more familiar spherical harmonic solution or the Elliptic integral solution. This alternate ...

Miscible displacement of magnetic fluids in a radial flow is investigated by means of highly accurate numerical schemes. Vigorous fingering instability is observed due to both the viscous contrast and external magnetic field if the less viscous fluid is the displacing force. However, the ...

Fringe-field-induced local Hall magnetometry is applied to investigate microstructured NiFe rings. The semiconductor-based technique yields a high detection sensitivity of magnetic stray fields. This allows an accurate measurement of different magnetic configurations and their reversible and ...

An analysis of a magnetic field sensor based on a graphene spin capacitor is presented. The proposed device consists of graphene nanoribbons on top of an insulator material connected to a ferromagnetic source/drain. The time evolution of spin polarized electrons injected into the capacitor can be used for an accurate determination at ...

A numerical procedure is described for the evaluation of magnetic coordinates given a toroidal, scalar pressure plasma with an arbitrary magnetic field. The accurate representation of magnetic field strength in this way is invaluable for the calculation of drift orbits and ...

Specific emphasis has been placed upon incorporating accurate .... The magnetic focusing field provided by the platinum cobalt magnets ... been made to match the ferrite to the Stycast K3 dielectric that fills the ..... verification testing; and 3) heat transfer tests. Care must be exercised ...

The traditional least squares method for modeling seamount magnetism is often unsatisfactory because the models fail to reproduce the observations accurately. An alternative approach generate an external field in close agreement with the observed anomaly....

The SSC dipole magnets must be very accurately aligned for the accelerator to work correctly. To align the magnets one must accurately know the center of the magnetic field. However, locating the center is difficult because of the extreme uniformity of the dipole ...

The SSC dipole magnets must be very accurately aligned for the accelerator to work correctly. To align the magnets one must accurately know the center of the magnetic field. However, locating the center is difficult because of the extreme uniformity of the dipole ...

X-ray powder diffraction experiments under pulsed magnetic fields were carried out at the DUBBLE beamline (BM26B) at the ESRF. A mobile generator delivered 110kJ to the magnet coil, which was sufficient to generate peak fields of 30T. A liquid He flow cryostat allowed us to vary the sample temperature ...

The Hanle effect was first used in solar physics to determine weak magnetic fields in prominences (see Leroy [CITE]). More recently the development of a new generation of very accurate spectro-polarimeters has open a new window for the diagnostics of weak magnetic fields in the solar ...

The accurate computation of the external magnetic field from a permanent magnet motor is accomplished by first computing its magnetic scalar potential. In order to find a solution which is valid for any arbitrary point external to the motor, a number of p...

The steady state of dipolar magnetic field expansion is examined by injecting a plasma jet from the center of the dipolar magnetic field (magnetic inflation). An effective magnetic inflation is essential for the realization of a magneto plasma sail (MPS), which produces a ...

This paper presents the theoretical and experimental studies of a dual-magnet (DM) configuration that forms the electromagnetic circuit of a nanopositioning actuator. Motivation of this work arises when an accurate prediction of the magnetic field behavior within the DM configuration is required to achieve ...

High precision mapping of the vacuum flux surfaces of the H-1NF heliac is carried out using electron-beam multi-wire tomography for various magnetic configurations and field strengths. The extreme accuracy of this technique has been exploited to understand the nature of error fields and to determine the best-fit empirical values for ...

High precision mapping of the vacuum flux surfaces of the H-1NF heliac is carried out using electron-beam multi-wire tomography for various magnetic configurations and field strengths. The extreme accuracy of this technique has been exploited to understand the nature of error fields and to determine the best-fit empirical values for ...

In the area where there is no field source, gravity field and magnetic field have similar properties. They all satisfy Laplace equation. In the area in which we need solution, the boundary low gradient values can be considered as the values of regional background field, so that separating out ...

Measurements of the effect of the superconductor magnetization on the field shape of dipole magnets are presented. Such effects are most obvious at low fields where the current capability of the windings is very high and only a small fraction is used to support the transport current which produces the ...

We present an accurate quantum mechanical study of elastic scattering and spin relaxation in collisions of O2(^3?g^-) molecules at cold and ultracold temperatures in the presence of a magnetic field. Our calculations show that magnetic spin relaxation in molecule-molecule collisions is extremely efficient except at ...

Although the electrocardiogram is known to be nondiagnostic within the bore of any high-field magnet due to the magnetohydrodynamic effect, there are an increasing number of applications that require accurate electrocardiogram monitoring of a patient inside the MRI room but outside of the magnet bore. ...

Motivated by the need for new means for specification and determination of 3D fields that are produced by electromagnetic lens elements in the region interior to coil windings and seeking to obtain techniques that will be convenient for accurate conductor placement and dynamical study of particle motion, we have generalized the representation of a 2D ...

Miscible flow displacements of a ferrofluid droplet subjected to various magnetic field configurations and confined in a time-dependent gap Hele-Shaw cell are examined through highly accurate numerical simulations. The interplay between lifting, miscibility, and applied magnetic fields resulted ...

The magnet shimming of compact cyclotrons generally consists of iterative procedures. The isochronous field error can be obtained with accurate ion gyration frequency along the radius calculated by numerical integration. The method related on the transformation from the isochronous field error to the geometry ...

It is vitally important to accurately measure the field components of a simulated electromagnetic pulse (EMP), to determine both the waveshape and the amplitude of the electromagnetic test environment. A parallel plate transmission line is used to calibra...

Observations of Zeeman transitions in Rb87 vapor can be used to make accurate measurements of the earth's magnetic field provided that the resonance lines are narrow enough so that the separate components of the transitions are resolved. However, the resu...

The properties of ferrogels in homogeneous magnetic fields are studied using a simple microscopic model and Monte Carlo simulations. The main phenomena of interest concern the anisotropy and enhancement of the elastic moduli that result from applying uniform magnetic fields before and after the ...

The zeta function regularization technique is used to study the finite temperature Casimir effect for a massless Majorana fermion field confined between parallel plates and satisfying bag boundary conditions. A magnetic field perpendicular to the plates is included. An expression for the zeta function is obtained, which is exact to all ...