Application of Grounded Electrical Source Airborne Transient Electromagnetic (GREATEM) System in Goaf Water Detection

2019 ◽  
Vol 24 (3) ◽  
pp. 387-397 ◽  
Author(s):  
Dongsheng Li ◽  
Zhongbin Tian ◽  
Yulong Ma ◽  
Jiayue Gu ◽  
Yanju Ji ◽  
...  
Keyword(s):  
Coal Mining ◽  
Detection Efficiency ◽  
Water Inrush ◽  
Shanxi Province ◽  
Effective Technique ◽  
Water Detection ◽  
Transient Electromagnetic ◽  
High Detection ◽  
High Detection Efficiency ◽  
Electrical Source

Since goaf water can cause water inrush, collapse or other severe geological hazards in coal mining, its detection has become a significant issue. As the grounded electrical source airborne transient electromagnetic (GREATEM) system can provide considerable prospecting depth, lateral resolution, and high detection efficiency, the method may be suitable for goaf water detection. To verify the feasibility, a field electromagnetic survey over Qinshui coal mine (Shanxi province, China) was conducted, and the system was used to detect the geoelectric characteristics of goaf water. After data acquisition, data processing, and apparent resistivity calculation, the resistivity profile of survey area is clearly presented, which is consistent with the information provided by Shanxi Coal Geology Geophysical Surveying Exploration Institute, China. The result shows that the application of GREATEM system is an effective technique for resistivity detection of goaf water, and can reduce the risks in coal mining.

High detection efficiency neutron sensitive microchannel plate

2013 ◽  
Vol 8 (01) ◽  
pp. P01015-P01015 ◽  
Author(s):  
J Pan ◽  
Y Yang ◽  
Y Tian ◽  
M Zeng ◽  
T Deng ◽  
...  
Keyword(s):  
Detection Efficiency ◽  
Microchannel Plate ◽  
High Detection ◽  
High Detection Efficiency

scholarly journals First measurements with the new 3He-filled Monoblock Aluminium Multitube neutron detector developed at the ILL for ANSTO PLATYPUS reflectometer

2020 ◽  
pp. 1-15
Author(s):  
Luis Abuel ◽  
Friedl Bartsch ◽  
Andrew Berry ◽  
Jean-Claude Buffet ◽  
Sylvain Cuccaro ◽  
...  
Keyword(s):  
Research Collaboration ◽  
Detection Efficiency ◽  
Mechanical Design ◽  
Performance Parameters ◽  
Detector Performance ◽  
High Detection ◽  
Neutron Wavelength ◽  
High Detection Efficiency ◽  
Main Detector ◽  
Characterisation Methods

A detector upgrade was carried out on the PLATYPUS instrument dedicated to neutron reflectometry at the Australian Nuclear Science and Technology Organisation (ANSTO). The new detector, developed in the framework of a research collaboration between the ILL and ANSTO, is based on the Monoblock Aluminium Multi-tube (MAM) detector design already in use on several reflectometers and SANS instruments at the ILL. This article provides a technical description of the mechanical design and read-out electronics of the PLATYPUS detector and its commissioning on the PLATYPUS instrument. The main detector performance parameters have been measured and are presented here as well as the characterisation methods and the results of several reflectometry measurements. These measurements show an improvement in experimental data quality resulting from high positional resolution, high detection efficiency and reduced neutron scattering background in the 2.5–19 Å neutron wavelength range used in PLATYPUS instrument.

scholarly journals Geothermal resource exploration by using Numerical simulation and comprehensive geophysical method

2021 ◽  
Author(s):  
Yang Yang ◽  
Bin Xiong ◽  
Sanxi Peng ◽  
Ibrar Iqbal ◽  
Tianyu Zhang
Keyword(s):  
Detection Efficiency ◽  
Energy Resource ◽  
Clean Energy ◽  
Shanxi Province ◽  
Geothermal System ◽  
Exploratory Research ◽  
Geothermal Resource ◽  
Geothermal Resources ◽  
Transient Electromagnetic ◽  
Resistivity Model

Abstract Geothermal energy is an important renewable clean energy resource with high development and usage potential. Geothermal resources, on the other hand, are buried deep below, and mining hazards are significant. Geophysical investigation is frequently required to determine the depth and location of geothermal resources. The Transient Electromagnetic Method (TEM) and the Controlled Source Audio Frequency Magnetotellurics (CSAMT) have the highest detection efficiency and accuracy of all electromagnetic exploration methods. This article initially explains the algorithm theory of the finite difference technique before establishing a simplified geothermal system resistivity model. Established on the simplified resistivity model, a simulation analysis of the ability of CSAMT and TEM to distinguish target body faults at different resistivities and dip angles was performed, and the effectiveness and difference of the two methods in detecting typical geothermal resource targets was verified. A complete exploratory research of CSAMT and TEM was conducted in Huairen County, Shuozhou City, Shanxi Province, China, based on theoretical analysis. Both approaches can reflect the geoelectric structure of the survey region, demonstrating the efficacy of the two methods in detecting genuine geothermal resources.

scholarly journals Potentialities of the future technical improvements in the search of rare nuclear decays by bolometers

2018 ◽  
Vol 33 (09) ◽  
pp. 1843003 ◽  
Author(s):  
Fabio Bellini
Keyword(s):  
Nuclear Physics ◽  
Detection Efficiency ◽  
Neutrinoless Double Beta Decay ◽  
Double Beta Decay ◽  
Particle Identification ◽  
X Ray ◽  
High Detection ◽  
High Detection Efficiency ◽  
Hybrid Devices ◽  
Excellent Energy Resolution

Bolometers are cryogenic calorimeters which feature excellent energy resolution, low energy threshold, high detection efficiency, flexibility in choice of materials, particle identification capability if operated as hybrid devices. After 30 years of rapid progresses, they represent nowadays a leading technology in several fields: particle and nuclear physics, X-ray astrophysics, cosmology. However, further and substantial developments are required to increase the sensitivity to the levels envisioned by future researches. A review of the challenges to be addressed and potentialities of bolometers in the search for rare nuclear decays is given, with particular emphasis to the neutrinoless double beta decay physics case.

Movements of mottled sculpins (Cottus bairdii) in a Michigan stream: how restricted are they?

2009 ◽  
Vol 66 (1) ◽  
pp. 31-41 ◽  
Author(s):  
Matthew J. Breen ◽  
Carl R. Ruetz ◽  
Kurt J. Thompson ◽  
Steven L. Kohler
Keyword(s):  
Home Range ◽  
Standard Error ◽  
Small Proportion ◽  
Detection Efficiency ◽  
Maximum Displacement ◽  
Passive Integrated Transponder ◽  
Seasonal Movement ◽  
High Detection ◽  
High Detection Efficiency ◽  
Movement Distance

We monitored 94 mottled sculpins ( Cottus bairdii ) marked with passive integrated transponder (PIT) tags to examine seasonal movement patterns. High detection efficiency (mean ± standard error = 0.76 ± 0.03) of PIT-tagged fish was obtained with a portable antenna. Nighttime searches were more effective than daytime relocations in summer, and smaller fish (<65 mm) were detected more readily than larger fish (≥65 mm). Sculpins used erosional habitats more than depositional habitats, particularly during summer and nighttime. Search attempts within a 150 m reach showed that displacement, mean movement distance, and home range did not differ significantly between summer and winter, suggesting that season did not strongly influence movement. Additionally, movement metrics were unrelated to sculpin size. However, supplementary searches of a larger reach (700 m) showed that 16% of PIT-tagged fish moved more than 100 m over 1 year, with a maximum displacement of 511 m, and mobile fish typically displayed upstream bias. Although most mottled sculpins in our system were relatively sedentary, a small proportion of individuals moved further than previously reported for other systems.

NUV Silicon Photomultipliers With High Detection Efficiency and Reduced Delayed Correlated-Noise

2015 ◽  
Vol 62 (3) ◽  
pp. 1318-1325 ◽  
Author(s):  
Fabio Acerbi ◽  
Alessandro Ferri ◽  
Gaetano Zappala ◽  
Giovanni Paternoster ◽  
Antonino Picciotto ◽  
...  
Keyword(s):  
Detection Efficiency ◽  
Correlated Noise ◽  
Silicon Photomultipliers ◽  
High Detection ◽  
High Detection Efficiency

Ultra-high cell-density silicon photomultipliers with high detection efficiency

2017 ◽  
Author(s):  
Fabio Acerbi ◽  
Alberto Gola ◽  
Veronica Regazzoni ◽  
Giovanni Paternoster ◽  
Giacomo Borghi ◽  
...  
Keyword(s):  
Cell Density ◽  
High Cell Density ◽  
Detection Efficiency ◽  
High Cell ◽  
Silicon Photomultipliers ◽  
High Detection ◽  
High Detection Efficiency
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