A5084918459- Particle accelerators and beam dynamics
- Seismic Imaging and Inversion Techniques
- Nuclear Physics and Applications
- Particle Accelerators and Free-Electron Lasers
- Superconducting Materials and Applications
- Drilling and Well Engineering
- Nuclear reactor physics and engineering
- Magnetic confinement fusion research
- Solid-state spectroscopy and crystallography
- Hydraulic Fracturing and Reservoir Analysis
- Seismic Waves and Analysis
- Reservoir Engineering and Simulation Methods
- Seismology and Earthquake Studies
- Advanced NMR Techniques and Applications
- Particle Detector Development and Performance
- Geological Studies and Exploration
- Atomic and Subatomic Physics Research
- Radiation Detection and Scintillator Technologies
- Ultrasonics and Acoustic Wave Propagation
- Geotechnical and Geomechanical Engineering
- Crystal Structures and Properties
- Nonlinear Optical Materials Research
- Geological Modeling and Analysis
- Geophysical Methods and Applications
- Scientific Computing and Data Management
Oak Ridge National Laboratory
2012-2024
Penza State University of Architecture and Construction
2021
Peoples' Friendship University of Russia
2020
Geophysical Survey
2006-2019
Moscow Power Engineering Institute
2019
GGG (France)
2019
Central Bank of the Russian Federation
2018
University of Tennessee at Knoxville
2018
Moscow State University
2016-2017
Lomonosov Moscow State University
2016-2017
Мы провели расширенный эксперимент для исследования, как управляемые свип-сигналы могут улучшить полноволновые сейсмические изображения по сравнению со стандартным линейным свип-сигналом при одинаковых параметрах съемки. Для эксперимента использовался легкий электромеханический вибратор в режимах излучения продольных и поперечных волн. Трехкомпонентная подвижная регистрация данных осуществлялась 220-метровой приемной расстановкой вдоль тротуара университетского кампуса. Были протестированы...
В работе представлены способы формирования новых псевдослучайных свип-сигналов, результаты моделирования синтетических трасс и разрезов на их основе, а также обработки данных разных свипов. Псевдослучайные свип-сигналы рассчитывались из линейных синусоидальных разверток путем изменения полярности сегментов полного периода или полупериода квазисинусоидального сигнала в соответствии с кодом М-последовательности. Были смоделированы пять различных включая один линейный свип-сигнал, случайный...
This Letter presents the first complete six dimensional phase space measurement of a beam in an accelerator. The was made on Spallation Neutron Source Beam Test Facility. data reveal previously unknown correlations distribution that are not visible lower dimensionality measurements. shown to be intensity dependent.
High-power particle accelerators are complex machines with thousands of pieces equipmentthat frequently running at the cutting edge technology. In order to improve day-to-dayoperations and maximize delivery science, new analytical techniques being exploredfor anomaly detection, classification, prognostications. As such, we describe applicationof an uncertainty aware Machine Learning method, Siamese neural network model, predictupcoming errant beam pulses using data from a single monitoring...
Research on the seismic nonlinearity of rocks began in Russia 1980s. The first stage this experimental and theoretical research established that geologic environment is seismically nonlinear sufficient to be recorded by existing systems. However, initial did not focus solving practical problems reservoir analysis.
Abstract 181Ta pure NQR spectra in ferroelectric LiTaO3 were studied from 77 K to room temperature. It was found that the electric field gradient asymmetry parameter has a non-zero value over all temperature ranges. 93Nb nuclear quadrupole interactions rare earth orthoniobates LaNbO4, YbNbO4, ErNbO4, and solid solutions K0.5Eu0.5Nb2O6 K0.5Tm0.5NB2O6 have been investigated 450 K. 139La frequencies LaNbO4 single crystal also measured at
The U.S. Spallation Neutron Source (SNS) is a state-of-the-art neutron scattering facility delivering the world's most intense pulsed beams to wide array of instruments, which are used conduct investigations in many fields engineering, physics, chemistry, material science, and biology. Neutrons produced by spallation liquid Hg bombardment short (∼1 µs), (∼35 A) pulses protons delivered at 60 Hz an accumulator ring fed high-intensity, 1 GeV, H- LINAC (linear accelerator). This has operated...
The adaptive vibroseis technology offers a way to improve seismic survey resolution and signal-to-noise ratio. This employs nonlinear sweep signals that are adjusted/adapted match the near-surface environment at each source point. automatic adjustment of signal changes in point environments along shot line expands spectra and, accordingly, results better reflection resolution, as well more consistent shapes amplitudes line. is introduced real time has virtually no effect on progress field surveys.
Charge exchange injection is the standard mechanism used to accumulate short, intense pulses of proton beams from an ${\mathrm{H}}^{\ensuremath{-}}$ injector into a synchrotron. Historically, this process has relied on foils remove two electrons ${\mathrm{H}}^{\ensuremath{-}}$, technique that been successfully employed for beam powers up 1.4 MW. However, such are known sublimate beyond threshold power density, requiring development another stripping technology does not have same limitation....
We conduct a detailed measurement and analysis of hadron beam in five-dimensional phase space at the Spallation Neutron Source Beam Test Facility. The measurement's resolution dynamic range are sufficient to image sharp, high-dimensional features low-density regions space. To facilitate complex task feature identification space, we develop several visualization techniques, including non-planar slicing. use these techniques examine transverse dependence longitudinal hollowing distribution....
At present, there is a need for vehicle-board antenna system of telecommand system. The includes the receiving antennas, transmitting power dividers and cable network. In this paper space vehicles series "Canopus-V" designed presented. addition to testing complex full-scale test has been developed. results measurement voltage standing-wave ratio, radiation pattern, gain antennas are obtained satisfy technical task equipment
Modern accelerator front ends almost exclusively include radio-frequency quadrupoles for initial capture and focusing of the low-energy beam. Dynamics in RFQ define longitudinal bunch parameters. Simulation SNS with PARMTEQ seeded a realistic LEBT distribution produces 2.5 MeV, 40 mA H- beam root-mean-square emittance 130 deg-keV. In measurement, detailed characterization phase space is made, including novel study dependence on transverse coordinates. This work introduces new virtual slit...
The purpose of the article is a scientific analysis activity detection, disclosure and investigation criminal offenses. Such specific type professional socially useful carried out by subjects (investigator, inquirer, operational unit employee, detective, etc.) with aim establishing truth, based on procedural evidence in proceedings. It has been proven that construction coherent, logically consistent, comprehensive system knowledge, which characterizes offenses, still ongoing criminology....
A. P. Zhukov, L. S. Golovchenko and G. K. Semin, Chem. Commun. (London), 1968, 854 DOI: 10.1039/C19680000854
Automatic methods used in conventional seismic data processing to make statics corrections work well with short-wavelength anomalies but regularly fail resolve mid-wavelength near-surface anomalies. Calculation of correct static time delays caused by heterogeneities is especially difficult when the extend from half a spread length 2–3 times source-receiver offset.