scholarly journals Muography applications developed by IFIN-HH

2018 ◽  
Vol 377 (2137) ◽  
pp. 20180137 ◽  
Author(s):  
Bogdan Mitrica ◽  
Denis Stanca ◽  
Bogdan Cautisanu ◽  
Mihai Niculescu-Oglinzanu ◽  
Alexandru Balaceanu ◽  
...  
Keyword(s):  
Detection System ◽  
Cosmic Ray ◽  
Muon Flux ◽  
Radiation Shielding ◽  
Radioactive Materials ◽  
Mining Sites ◽  
Non Invasive ◽  
Cosmic Muon ◽  
New Directions ◽  
Flux Measurements

Cosmic-ray muons have been studied at IFIN-HH for more than 20 years. Starting as fundamental physics research, the muon flux measurements bring new directions of study regarding muography. Two new directions have been recently developed: underground muon scanning of old mining sites in order to detect the possible presence of unknown cavities and underwater scanning of ships in commercial harbours in order to prevent the illegal traffic of radioactive materials. The main goal of the first direction of study is to improve the security of underground civilian and industrial infrastructures, by starting the development of a new, innovative detection system that can be used to identify potentially dangerous conditions using a non-invasive, totally safe method. The method proposed uses information provided by a device placed underground that measures directional cosmic muon flux and identifies anomalies produced by irregularities in the geological layers above. For the second direction of study, the method proposed is based on the detection and analysis of the cosmic muon flux. The high-density materials (uranium, lead—used for radiation shielding, etc.) cause a decrease in the directional muon flux. The detection system will be submerged underneath the ship that will be scanned, being able to locate illegal radioactive materials without exposing any personnel to radiation or contamination. Correlated with simulations based on the known configuration of the ship scanned, the data provided by the detection system will provide the location and dimensions of the undeclared material transported. This article is part of the Theo Murphy meeting issue ‘Cosmic-ray muography’.

scholarly journals Cosmic muon flux measurements at the Kimballton Underground Research Facility

2014 ◽  
Vol 9 (08) ◽  
pp. P08010-P08010 ◽  
Author(s):  
L N Kalousis ◽  
E Guarnaccia ◽  
J M Link ◽  
C Mariani ◽  
R Pelkey
Keyword(s):  
Muon Flux ◽  
Research Facility ◽  
Cosmic Muon ◽  
Flux Measurements

scholarly journals A Mobile Detector for Muon Measurements Based on Two Different Techniques

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
B. Mitrica ◽  
D. Stanca ◽  
M. Petcu ◽  
I. M. Brancus ◽  
R. Margineanu ◽  
...  
Keyword(s):  
Optical Fibers ◽  
Wave Length ◽  
Light Output ◽  
Environmental Studies ◽  
Muon Flux ◽  
Practical Applications ◽  
Cosmic Muon ◽  
Flux Measurements ◽  
Comparative Results ◽  
Set Up

Precise measurements of the muon flux are important for different practical applications, both in environmental studies and for the estimation of the water equivalent depths of underground sites. A mobile detector for cosmic muon flux measurements has been set up at IFIN-HH, Romania. The device is used to measure the muon flux on different locations at the surface and underground. Its first configuration, not used in the present, has been composed of two 1 m2scintillator plates, each viewed by wave length shifters and read out by two Photomultiplier Tubes (PMTs). A more recent configuration, consists of two 1 m2detection layers, each one including four 1 · 0,25 m2large scintillator plates. The light output in each plate is collected by twelve optical fibers and then read out by one PMT. Comparative results were obtained with both configurations.

scholarly journals Design Study of an Underground Detector for Measurements of the Differential Muon Flux

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Bogdan Mitrica
Keyword(s):  
Cosmic Ray ◽  
Muon Flux ◽  
Salt Mine ◽  
Important Variation ◽  
Directional Variation ◽  
Underground Detector ◽  
Flux Measurements ◽  
Plastic Scintillators ◽  
Mobile Frame ◽  
Differential Flux

Since 2006 an underground laboratory is in operation in Unirea salt mine from Slanic Prahova Romania. A new rotatable detector for measurements of the directional variation of the muon flux has been designed and will be put in operation at the end of 2013. The detector will be used to investigate the possible presence of unknown cavities in the salt ore. Preliminary muon flux measurements performed in the underground of Slanic Prahova salt mine show an important variation of the flux with the thickness of the rock but indicate also that more precise data are necessary. Based on that, a modern detector using 4 layers of plastic scintillators bars has been designed. The detector is installed on a rotatable and mobile frame which allows precise directional measurements of the muon flux on different locations in the mine. In order to investigate the performances of the detector, detailed Monte Carlo simulations have been performed using several codes available on the market. The simulations show that the detector can be used for measurements of the differential flux of cosmic ray muons and for the detection of hidden cavities in the ore.

DEPENDENCE OF THE COSMIC MUON FLUX ON ATMOSPHERIC PRESSURE AND TEMPERATURE

2007 ◽  
Vol 14 (1) ◽  
Author(s):  
PHAM NGOC DIEP ◽  
PHAM THI TUYET NHUNG ◽  
PHAM NGOC DINH ◽  
NGUYEN HAI DUONG ◽  
PIERRE DARRIULAT ◽  
...  
Keyword(s):  
Atmospheric Pressure ◽  
Muon Flux ◽  
Cosmic Muon

scholarly journals Buccal swabs as non-invasive specimens for detection of severe acute respiratory syndrome coronavirus-2

2021 ◽  
Vol 49 (5) ◽  
pp. 030006052110169
Author(s):  
Ritu Gaur ◽  
Dipesh Kumar Verma ◽  
Ritin Mohindra ◽  
Kapil Goyal ◽  
Shipra Gupta ◽  
...  
Keyword(s):  
Severe Acute Respiratory Syndrome ◽  
Internal Control ◽  
Gold Standard ◽  
Detection System ◽  
Buccal Swab ◽  
Non Invasive ◽  
Human Rnase ◽  
Buccal Swabs ◽  
Reverse Transcription Quantitative Pcr ◽  
Env Protein

Introduction The current gold standard for detection of severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) RNA involves subjecting nasopharyngeal or oropharyngeal swabs to reverse transcription quantitative PCR (RT-qPCR). However, both sample types need to be collected by trained professionals. Using self-collected buccal swabs as an alternative could simplify and accelerate diagnosis of coronavirus disease 2019 (COVID-19). Objective To assess self-collected buccal swab samples as an alternative method for SARS-CoV-2 detection in patients with COVID-19. Methods Buccal swab samples were self-collected by 73 patients with COVID-19. Total RNA was extracted using Qiagen kits. RNA encoding the SARS-CoV-2 Env protein and human RNase P as an internal control was amplified using the TRUPCR® SARS-CoV-2 RT-qPCR kit version 2.1 and a Bio-Rad CFX96 Real-Time Detection System. Result The sensitivity of RT-qPCR from buccal swabs was 58.9% (43/73; 95% confidence interval [CI] 46.77%–70.27%) and that of RT-qPCR from saliva was 62.90% (39/62; 95% CI 49.69%–74.84%) taking positive SARS-CoV-2 RT-qPCR from nasopharyngeal swabs as the gold standard. Conclusion Self-collected buccal swabs are promising alternatives to nasopharyngeal or oropharyngeal swabs for SARS CoV-2 detection.

scholarly journals Sensors for the detection of ammonia as a potential biomarker for health screening

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Peter P. Ricci ◽  
Otto J. Gregory
Keyword(s):  
Vapor Phase ◽  
Detection System ◽  
Health Screening ◽  
The Body ◽  
Peptic Ulcers ◽  
Non Invasive ◽  
Sensing Platform ◽  
Potential Biomarker ◽  
Screening Protocol ◽  
H Pylori

AbstractThe presence of ammonia within the body has long been linked to complications stemming from the liver, kidneys, and stomach. These complications can be the result of serious conditions such as chronic kidney disease (CKD), peptic ulcers, and recently COVID-19. Limited liver and kidney function leads to increased blood urea nitrogen (BUN) within the body resulting in elevated levels of ammonia in the mouth, nose, and skin. Similarly, peptic ulcers, commonly from H. pylori, result in ammonia production from urea within the stomach. The presence of these biomarkers enables a potential screening protocol to be considered for frequent, non-invasive monitoring of these conditions. Unfortunately, detection of ammonia in these mediums is rather challenging due to relatively small concentrations and an abundance of interferents. Currently, there are no options available for non-invasive screening of these conditions continuously and in real-time. Here we demonstrate the selective detection of ammonia using a vapor phase thermodynamic sensing platform capable of being employed as part of a health screening protocol. The results show that our detection system has the remarkable ability to selectively detect trace levels of ammonia in the vapor phase using a single catalyst. Additionally, detection was demonstrated in the presence of interferents such as carbon dioxide (CO2) and acetone common in human breath. These results show that our thermodynamic sensors are well suited to selectively detect ammonia at levels that could potentially be useful for health screening applications.

Measurement of the east–west asymmetry of the cosmic muon flux in Hanoi

2004 ◽  
Vol 678 (1-2) ◽  
pp. 3-15 ◽  
Author(s):  
Pham Ngoc Diep ◽  
Pham Ngoc Dinh ◽  
Nguyen Hai Duong ◽  
Pham Thi Tuyet Nhung ◽  
Pierre Darriulat ◽  
...  
Keyword(s):  
Muon Flux ◽  
Cosmic Muon ◽  
East West
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