Conferences related to Nuclear Well Logging

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2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)

Technical presentations will range from the fundamental physics of electron emission and modulated electron beams to the design and operation of devices at UHF to THz frequencies, theory and computational tool development, active and passive components, systems, and supporting technologies.System developers will find that IVEC provides a unique snapshot of the current state-of-the-art in vacuum electron devices. These devices continue to provide unmatched power and performance for advanced electromagnetic systems, particularly in the challenging frequency regimes of millimeter-wave and THz electronics.Plenary talks will provide insights into the history, the broad spectrum of fundamental physics, the scientific issues, and the technological applications driving the current directions in vacuum electronics research.


2020 IEEE International Conference on Plasma Science (ICOPS)

IEEE International Conference on Plasma Science (ICOPS) is an annual conference coordinated by the Plasma Science and Application Committee (PSAC) of the IEEE Nuclear & Plasma Sciences Society.


2020 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)

All areas of ionizing radiation detection - detectors, signal processing, analysis of results, PET development, PET results, medical imaging using ionizing radiation


2018 12th International Symposium on Antennas, Propagation and EM Theory (ISAPE)

ISAPE, a serial symposium on antennas, propagation, and EM theory, offers an active forum for exchanging creative ideas and experiences on the latest developments and designs in the areas of antennas, propagation, and electromagnetic theory for professors, researchers, engineers, and excellent students all over the world.


2018 IEEE-NPSS Real Time Conference (RT)

Real time computing applications involving both hardware and software development in nuclear, particle, plasma and other related fields.


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Periodicals related to Nuclear Well Logging

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Antennas and Propagation, IEEE Transactions on

Experimental and theoretical advances in antennas including design and development, and in the propagation of electromagnetic waves including scattering, diffraction and interaction with continuous media; and applications pertinent to antennas and propagation, such as remote sensing, applied optics, and millimeter and submillimeter wave techniques.


Applied Superconductivity, IEEE Transactions on

Contains articles on the applications and other relevant technology. Electronic applications include analog and digital circuits employing thin films and active devices such as Josephson junctions. Power applications include magnet design as well asmotors, generators, and power transmission


Automation Science and Engineering, IEEE Transactions on

The IEEE Transactions on Automation Sciences and Engineering (T-ASE) publishes fundamental papers on Automation, emphasizing scientific results that advance efficiency, quality, productivity, and reliability. T-ASE encourages interdisciplinary approaches from computer science, control systems, electrical engineering, mathematics, mechanical engineering, operations research, and other fields. We welcome results relevant to industries such as agriculture, biotechnology, healthcare, home automation, maintenance, manufacturing, pharmaceuticals, retail, ...


Geoscience and Remote Sensing Letters, IEEE

It is expected that GRS Letters will apply to a wide range of remote sensing activities looking to publish shorter, high-impact papers. Topics covered will remain within the IEEE Geoscience and Remote Sensing Societys field of interest: the theory, concepts, and techniques of science and engineering as they apply to the sensing of the earth, oceans, atmosphere, and space; and ...


Geoscience and Remote Sensing, IEEE Transactions on

Theory, concepts, and techniques of science and engineering as applied to sensing the earth, oceans, atmosphere, and space; and the processing, interpretation, and dissemination of this information.


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Most published Xplore authors for Nuclear Well Logging

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Xplore Articles related to Nuclear Well Logging

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Monte Carlo differential neutron sensitivity calculations for nuclear well-logging

IEEE Transactions on Nuclear Science, 1993

The spatial response of neutron porosity measurements is of interest for understanding the physics of neutron logging tools. A generalized numerical technique using Monte Carlo simulation has been developed. It permits computations of sensitivity functions for essentially any type of nuclear well-logging measurement, including various neutron tools. Calculations of the sensitivity functions are implemented through modification of the MCNP Monte ...


Monte Carlo differential neutron sensitivity calculations for nuclear well-logging

IEEE Conference on Nuclear Science Symposium and Medical Imaging, 1992

The spatial response of neutron porosity measurements, particularly their depth of investigation and their vertical resolution, is of considerable interest for understanding the physics of neutron logging tools. A generalized numerical technique using Monte Carlo simulation has been developed which makes it possible to compute sensitivity functions for essentially any type of nuclear well-logging measurement, including various neutron tools. Calculations ...


Specific purpose Monte Carlo modelling of nuclear well logging tool responses

IEEE Transactions on Nuclear Science, 1988

Statistical estimation and direction biasing combined with path-length stretching have been incorporated in special-purpose Monte Carlo codes for modeling pulse-neutron and dual-spaced neutron well-logging-tool responses. Experimental test-pit results have been simulated with these codes, indicating that they are accurate. The codes are run on a DEC Microvax II computer in very reasonable CPU times and are easy to use. It ...


MCNP capabilities for nuclear well logging calculations

IEEE Transactions on Nuclear Science, 1990

The Los Alamos Radiation Transport Code System (LARTCS) consists of state-of- the-art Monte Carlo and discrete ordinates transport codes and data libraries. The general-purpose, continuous-energy Monte Carlo code MCNP (Monte Carlo neutron photon), part of the LARTCS, provides a computational, predictive capability for many applications of interest to the nuclear well logging community. The generalized three-dimensional geometry of MCNP is ...


Operative Petrophysical Interpretation Of The Nuclear Well Logging Data

1993 IEEE Conference Record Nuclear Science Symposium and Medical Imaging Conference, 1993

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Educational Resources on Nuclear Well Logging

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IEEE-USA E-Books

  • Monte Carlo differential neutron sensitivity calculations for nuclear well-logging

    The spatial response of neutron porosity measurements is of interest for understanding the physics of neutron logging tools. A generalized numerical technique using Monte Carlo simulation has been developed. It permits computations of sensitivity functions for essentially any type of nuclear well-logging measurement, including various neutron tools. Calculations of the sensitivity functions are implemented through modification of the MCNP Monte Carlo transport code. Analyses of the spatial responses of an epithermal logging tool using sensitivity function calculations are presented. The results are found to be in good agreement with the empirical data.<>

  • Monte Carlo differential neutron sensitivity calculations for nuclear well-logging

    The spatial response of neutron porosity measurements, particularly their depth of investigation and their vertical resolution, is of considerable interest for understanding the physics of neutron logging tools. A generalized numerical technique using Monte Carlo simulation has been developed which makes it possible to compute sensitivity functions for essentially any type of nuclear well-logging measurement, including various neutron tools. Calculations of the sensitivity functions are implemented through modification of the MCNP Monte Carlo transport code. The authors present analyses of the spatial responses of an epithermal logging tool using sensitivity function calculations. The results are found to be in good agreement with the empirical data.<<ETX>>

  • Specific purpose Monte Carlo modelling of nuclear well logging tool responses

    Statistical estimation and direction biasing combined with path-length stretching have been incorporated in special-purpose Monte Carlo codes for modeling pulse-neutron and dual-spaced neutron well-logging-tool responses. Experimental test-pit results have been simulated with these codes, indicating that they are accurate. The codes are run on a DEC Microvax II computer in very reasonable CPU times and are easy to use. It is estimated that further optimization of the biasing parameters, inclusion of correlated sampling, and other improvements will yield computer codes that are about an order of magnitude faster than the present general-purpose codes.<<ETX>>

  • MCNP capabilities for nuclear well logging calculations

    The Los Alamos Radiation Transport Code System (LARTCS) consists of state-of- the-art Monte Carlo and discrete ordinates transport codes and data libraries. The general-purpose, continuous-energy Monte Carlo code MCNP (Monte Carlo neutron photon), part of the LARTCS, provides a computational, predictive capability for many applications of interest to the nuclear well logging community. The generalized three-dimensional geometry of MCNP is well-suited for borehole-tool models. SABRINA, another component of the LARTCS, is a graphics code that can be used to interactively create a complex MCNP geometry. Users can define many source and tally characteristics with standard MCNP features. The time-dependent capability of the code is essential when modeling pulsed sources. Problems with neutrons, photons, and electrons as either single particle or coupled particles can be calculated with MCNP. The physics of neutron and photon transport and interactions is modeled in detail using the latest available cross-sectional data. A rich collection of variance reduction features can greatly increase the efficiency of a calculation. MCNP is written in FORTRAN 77 and has been run on a variety of computer systems from scientific workstations to supercomputers.<<ETX>>

  • Operative Petrophysical Interpretation Of The Nuclear Well Logging Data

    None

  • An application of Kalman filtering in nuclear well logging

    The paper describes an application of (adaptive) Kalman filtering to a geophysical subsurface estimation problem. The NGT is a sonde designed to detect the natural gamma rays of various energies emitted from a formation by the thorium (Th), uranium (U) and potassium (K). Using a minicomputer at the surface, the (Th, U, K) concentrations along the borehole have to be estimated on-line from the detection of the gamma rays in five energy windows. The standard technique in the logging industry has been to compute the elemental concentrations at a given depth from the corresponding observed counting rates. The resulting estimates have fairly large statistical errors which have limited the application of the NGT in computer reservoir evaluation. In this paper, it is shown that much better estimates can be obtained from a Kalman filter based on a dynamical model of the (Th, U, K) vertical variations.

  • Calculation of Monte Carlo importance functions for use in nuclear-well logging calculations

    Examines four variance reduction approaches: geometry splitting with Russian roulette; weight windows; quasi-deterministic generated weight windows; and integral transport functions applied in MCNP, a general Monte Carlo radiation transport computer code. The latter three are relatively new techniques that offer methodologies for improving the efficiency of the Monte Carlo calculation. Each of the techniques is applied to a neutron porosity tool. The near and far detector response are calculated, and the results are compared. Weight window generation is shown to work very well if iterations are performed on optimization of detector response. Quasi-deterministic generation requires less user interface, reduces statistical noise, and needs no iterative steps; however, with the current algorithms, there are large memory requirements. Integral-transport generation requires setting up and executing the XTRAPT code but provides very good weights, and the method yields global transport solutions useful to tool response understanding.<<ETX>>

  • Needs of well logging industry in new nuclear detectors

    In this paper we discuss some challenges of nuclear well logging related to the lack of the gamma ray and neutron detection technologies capable of operating reliably in the down-hole hostile environment. Different nuclear well logging techniques are described, the parameters of nuclear detectors which would satisfy the requirements imposed by these techniques are considered, and the results of the analysis in the well logging industry demand's for different types of nuclear detectors is presented. The impact of several technological innovations introduced recently in nuclear well logging, including detectors based on LnBr<sub>3</sub>:Ce and GYSO scintillation materials, are discussed. The possibility of replacing He<sup>3</sup> ionization detectors with Li<sup>6</sup> glass scintillation detectors is considered. Also some of the reliability problems of well logging nuclear detectors are analysed and their possible solutions are discussed.

  • Applicability of GSO scintillators for well logging

    Cerium-doped gadolinium oxyorthosilicate (GSO:Ce) was developed as a scintillating material for application in positron emission tomography. The fundamental properties of this material were studied, with particular attention given to properties relevant to nuclear well logging applications and their temperature dependence. Initial evaluations indicated that this material had a number of properties which seemed to make it a favorable candidate for well logging applications, such as the reported decay-time constant of 60 ns. Subsequent studies showed the presence of a longer, 600-ns. decay constant, which, coupled with its extremely high thermal neutron absorption cross section and relatively low light output, raised questions about its suitability. The temperature dependence of GSO:Ce was investigated to better evaluate its applicability as a gamma-ray detector for nuclear well logging applications. It is noted that the main advantage of GSO, compared to other scintillators that can be used for well logging applications. is the increase in detection efficiency that can be achieved without the need for cooling the detector.<<ETX>>

  • Applicability of barium fluoride and cadmium tungstate scintillators for well logging

    The authors discuss the fundamental properties of barium fluoride and cadmium tungstate, with particular attention to properties relevant to nuclear well logging applications and their temperature dependence. Both detectors have properties that would seem to make them useful for specific logging measurements. However, other properties limit their usefulness. For example, barium fluoride has a fast emission output that lends itself to high counting rates, but the intensity of this emission is very weak and is at a wavelength that is not efficiently detected by common logging photomultipliers. Cadmium tungstate's high density and atomic number give it excellent detection efficiency, but its applications in well logging are limited by its long scintillation decay constant.<<ETX>>



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