Results 141 to 150 of about 1,709 (182)

Simulation study of a novel Relaxometer shield design

2015 5th International Workshop on Magnetic Particle Imaging (IWMPI), 2015
Developing tracers for MPI and related applications requires a thorough understanding of underlying relaxation processes. In X-Space MPI reconstruction, relaxation has a profound impact on the image through a decrease in SNR and direction-dependent blurring.
Patrick William Goodwill, Mark A Griswold   +1 more
exaly   +2 more sources

Desktop fast-field cycling nuclear magnetic resonance relaxometer

Solid State Nuclear Magnetic Resonance, 2010
In this paper a new type of Fast Field Cycling (FFC) Nuclear Magnetic Resonance (NMR) relaxometer with low power consumption (200W) and cycle to cycle field stability better than 10(-4) is described. The new high-permeability magnet was designed to allow for good magnetic field homogeneity and allows for the sample rotation around an axis perpendicular
Gil D Marques, Pedro J Sebastião
exaly   +3 more sources

Current source of a FFC NMR relaxometer linearly controlled

2013 15th European Conference on Power Electronics and Applications (EPE), 2013
A Fast Field Cycling (FFC) Nuclear Magnetic Resonance (NMR) relaxometer combines optimized magnets (low volume and power losses) and power apparatus that integrate power supplies and control methods. The magnet of a FFC NMR relaxometer determines the requirements of the main power supply.
Elmano F Margato
exaly   +2 more sources

A nuclear magnetic relaxometer for express testing of the condensed medium conditions

Instruments and Experimental Techniques, 2015
The design of a compact nuclear magnetic relaxometer is described. This relaxometer is capable of measuring longitudinal T 1 and transverse T 2 relaxation times of condensed media in a weak magnetic field with B 0 = 62 mT.
Elena N Velichko
exaly   +2 more sources

Using NMR Relaxometer in the Study of Unconventional Rocks Characteristics

SPE Russian Oil and Gas Exploration & Production Technical Conference and Exhibition, 2014
Abstract NUCLEAR MAGNETIC RESONANCE (NMR), NMR RELAXOMETER, STRUCTURE OF VOID SPACE, "FRITILLARY", "WEATHERING CRUST", "BAZHENITE" (OIL SHALES), BI-MODAL NMR DISTRIBUTION, ROUTINE CAPILLARY METHODS This paper presents the results of NMR studies of structure of void space of rocks from unconventional reservoirs.
V. Vavilin, T. Galiyev, A. Kunakasov, E. Sorokina   +3 more
exaly   +2 more sources

Electromagnetic relaxometer (RF-1 relaxograph)

Polymer Science USSR, 1968
V.T. Fayerman, V.V. Korzin, V.V. Dronnikov   +2 more
exaly   +2 more sources

An Inexpensive Controlled‐Atmosphere Stress Relaxometer

Review of Scientific Instruments, 1971
exaly   +2 more sources

A Compression Relaxometer for Rubber Materials

Rubber Chemistry and Technology, 1973
Abstract A relaxometer which permits measurements of stress relaxation for compressed rubber samples is presented. Measurements in the temperature range 316.5 to 412.7° K show the good function of the relaxometer. The relaxometer has also been used in a study of deviations from linear viscoelastic behavior.
B. Stenberg, J. F. Jansson
openaire   +1 more source

Structure of a Nuclear Magnetic Resonance Signal in a Small Relaxometer

Journal of Communications Technology and Electronics, 2021
A model is proposed for describing the line shape of absorption and dispersion signals from which a recorded signal of nuclear magnetic resonance (NMR) is formed in a weak field. The expediency of using spectral analysis to determine the contributions of absorption and dispersion signals to the recorded NMR signal has been substantiated using a ...
R. V. Davydov, V. I. Dudkin, D. I. Nikolaev, V. V. Davydov, S. S. Makeev, A. V. Moroz   +5 more
openaire   +1 more source

Measuring stress relaxation in a compression relaxometer

Journal of Non-Crystalline Solids, 1992
In stress relaxation measurements, utilizing a sample in the shape of a thick cylinder the stiffness of the sample is typically greater than the stiffness of the measuring unit of the device. In this case, the observed stress relaxation time may be orders of magnitude greater than that expected from the viscosity over shear modulus ratio.
Steven N. Crichton, Simon M. Rekhson
openaire   +1 more source