Results 101 to 110 of about 698 (138)

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 Velichko, V I Dudkin, A Yu Karseev   +2 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

Pulse Train Microprocessor Programmer for NMR Relaxometers-Diffusiometers

Instruments and Experimental Techniques, 2002
A pulse train programmer for a spin-echo NMR relaxometer-diffusiometer is based on an AT89C51-24PC microcontroller. The programmer ensures the arbitrary generation of pulse trains with a minimum train step of 30 μs and recording of up to 30 000 10-bit amplitudes of spin-echo NMR signals with a minimum quantization step of 3 μs. The all-in-one one-board
Teplov V., Romanov V., Anisimov A., Romanov A.   +3 more
openaire   +5 more sources

A Programmable Pulse Sequence Generator for an NMR Relaxometer

Instruments and Experimental Techniques, 2005
A pulse sequence generator for NMR relaxometer is described. The operation mode is loaded into the internal memory of the device by a program from a personal computer via a PCI bus. The project is realized on two MAX7000S and Cyclone (Altera) chips using the Qartus II 4.0 software.
R. N. Stolbunov, S. A. Chichikov, A. G. Lundin   +2 more
openaire   +1 more source

Magnetic Particle Fingerprinting using Arbitrary Waveform Relaxometer

2020
In magnetic particle imaging (MPI), the information about the local environment, such as its viscosity and temperature, can be inferred via the relaxation behavior of the nanoparticles. As the nanoparticle signal also changes with drive field (DF) parameters, one potential problem for quantitative mapping applications is the optimization of these ...
Yağız, Ecrin, Utkur, Mustafa, Top, C. B., Sarıtaş, Emine Ülkü   +3 more
openaire   +2 more sources

Using the NMR Relaxometer in Laboratory Petrophysical Analysis

Proceedings, 2013
In our laboratory the NMR method has been used for analysis of core samples. Inaccuracy of results has been estimated. All results have been compared with traditional methods of analysis. Pore space structure changes during different technical influence to rock, also when the drilling fluid flows through core, we used NMR relaxometer for determination ...
V.A. Vavilin, T.R. Galiev, E.V. Sorokina, A.A. Kunakasov   +3 more
openaire   +1 more source