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Boron-10 lined proportional counter development for thermal neutron detection

Radiation Detection Technology and Methods 2021年第1期5卷 110-116页

作者： mohamed Fares mohamed yacine debili Mohammed Messaoudi Samir Begaa Kassida Negara Adnane Messai Laboratory of Nuclear Detectors Department Detection and MeasurementNuclear Research Centre of BirineP.O.Box 18017200 Ain OusseraDjelfaAlgeria LM2S Physics DepartmentFaculty of ScienceBadji Mokhtar UniversityBP 1223200 AnnabaAlgeria Reactor Chemistry Department Nuclear Research Centre of BirineP.O.Box 18017200 Ain OusseraDjelfaAlgeria

Purpose Neutrons detection is of paramount importance in nuclear physics experiments,reactor physics,monitoring and control of nuclear reactors and in radiation *** the neutron detectors used are Proportional Counters(PC to BF3,boron deposition,3He),Our Detection and Measurements laboratory has embarked on a project to develop,design and build proportional counters with boron deposition mainly for gas filling,several prototypes of which have been *** This work presents the Boron-10 Lined Proportional Counters(PC),developed and produced in the Detection and Measurements Department(DDM19).The PC was designed by adopting,for the electrodes,a stainless steel cathode 0.5 mm thick and a gold-plated tungsten anode with diameter of 25μ*** detectors are filled with an Ar-CH4 mixture(10%)at a pressure of 20 *** boron deposition is performed by the technique of *** The results obtained using the DDM19 prototype PC(Detector produced in our Detection and Measurement laboratory,2019),show the advantage of electrophoresis as a better boron deposition technique,and the limitation of the surface mass of 10B to optimal values is around 0.5 at 0.6 mg/*** The characteristics of the gas amplification in the mixture(Ar-CH4(CH410%)),were measured by different methods and compared with the values of the proportional reference counter *** counting plates for the two reference meters LND232 and our DDM19 prototype from 200 to 300 V have slopes ranging from 6.5 to 10%/100 V,and gas amplification factors from 1436 to 1380,respectively.

关键词： Neutron detector Boron-10 lined proportional counter Reference LND232 Boron deposition technique

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^(3)He proportional counter development for thermal neutron detection

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Radiation Detection Technology and Methods 2021年第2期5卷 264-272页

作者： mohamed Fares Adnane Messai Samir Begaa Maameri Salem Kassida Negara mohamed yacine debili Mohammed Messaoudi Laboratory of Nuclear Detectors Department Detection and MeasurementNuclear Research Centre of BirineP.O.Box 18017200 Ain OusseraDjelfaAlgeria Reactor Chemistry Department Nuclear Research Centre of BirineP.O.Box 18017200 Ain OusseraDjelfaAlgeria LM2S Physics DepartmentFaculty of ScienceUniversity of Badji Mokhtar-AnnabaP.O.Box.BP 1223000 AnnabaAlgeria

Neutron detection is used in a wide range of applications in nuclear physics,radiation protection,nuclear fuel cycle,reactor instrumentation,security and industrial *** the detectors used in this field,we notice the gas-filled 3He proportional counters which have been one of the main detecting tools for thermal and cold neutron detection for many *** last characteristic has ensured that this detector is one of the best tools for thermal neutron flux measurements in a nuclear reactor *** the instrumentation and detection laboratory of the Nuclear Research Center,of Birine,we are working toward the design and the development of this type of detectors,indeed,several prototypes of neutron detectors have been realized including the 3He proportional *** this paper,we will present the experimental steps and the obtained results to carry out a 3He proportional counter prototype that was fully developed and tested in our laboratory.A comparison study was made between our detector and a commercial cylindrical 3He neutron detector which was considered in this work as a reference detector:LND252(3He)-*** results showed that the characteristics of the gas amplification and the counting plateau for the two counters reference LND 252(3He)-PC and our prototype was of the same order of *** experimental tests show that our developed prototype perfect fit with the standard International Electrotechnical Commission(IEC,***)in the operating principle,the technology adopted and obtained technical specifications.

关键词： Neutrons detectors 3He proportional counters Counting plateau Discrimination Gas amplification

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Development of self-powered neutron detectors used in nuclear medicine for the measurement of neutron flows during treatment of boron neutron therapy

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Radiation Detection Technology and Methods 2021年第3期5卷 459-465页

作者： mohamed Fares Adnane Messai Salem Mameri Mohammed Messaoudi mohamed yacine debili Hebboul Nourddine Kassida Negara Begaa Samir Laboratory of Nuclear Detectors Department Detection and MeasurementNuclear Research Centre of BirineAin OusseraP.O.Box 18017200 DjelfaAlgeria Reactor Chemistry Department Nuclear Research Centre of BirineAin OusseraP.O.Box 18017200 DjelfaAlgeria LM2S Physics DepartmentFaculty of ScienceUniversity of Badji Mokhtar-AnnabaP.O.Box.BP 1223000 AnnabaAlgeria

Purpose The Self Powered Neutrons Detectors(SPND)have the advantage of not requiring a high voltage power supply for their operation and are small in size,enhancing the interest of these detectors in *** In this context,we have developed a thermal neutron detection system based on *** detector was placed in the thermal channel of our nuclear research reactor;where the values of the current for each detector have been recorded as a function of time,with a chain in a current mode where electrometers without HV were *** We performed the real-time measurement of neutron flux during boron neutron capture therapy or boron neutron therapy,the different materials constituting the SPND detectors have been carefully chosen for this *** detectors were tested at a power of four MW corresponding to a neutron flux of 10^(9) n cm^(−2) s^(−1).Conclusions The usefulness of 103Rh-SPND is for online measurement of thermal neutron flux on BNCT patients has been demonstrated based on an appropriate calibration of the thermal neutron spectrum.

关键词： SPND Thermal neutron Capture therapy Flux Detection Boron

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Observer design for induction motor： an approach based on the mean value theorem

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Frontiers in Energy 2014年第4期8卷 426-433页

作者： mohamed yacine HAMMOUDI Abdelkarim ALLAG mohamed BECHERIF mohamed BENBOUZID Hamza ALLOUI MSE Laboratory Department of Electrical Engineering University ofBiskra BP 145 Biskra 07000 Algeria FCLab University of Technology of Belfort-Montbdliard CNRS 3539 Femto-ST UMR 6174 Belfort 90010 France LBMS University of Brest Kergoat street CS 93837 29238 BrestCedex 3 France Ecole militaire polytechnique UER ELT Algiers 1611 Algeria

In this paper, observer design for an induction motor has been investigated. The peculiarity of this paper is the synthesis of a mono-Luenberger observer for highly coupled system. To transform the nonlinear error dynamics for the induction motor into the linear parametric varying （LPV） system, the differential mean value theorem combined with the sector nonlinearity transformation has been used. Stability conditions based on the Lyapunov function lead to solvability of a set of linear matrix inequalities. The proposed observer guarantees the global exponential convergence to zero of the estimation error. Finally, the simulation results are given to show the performance of the observer design.

关键词： observer design differential mean value theorem (DMVT) sector nonlinearity transformation linear matrix inequalities (LMI) induction motor

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Classical state feedback controller for nonlinear systems using mean value theorem： closed Ioop-FOC of PMSM motor application

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Frontiers in Energy 2015年第4期9卷 413-425页

作者： Abrar ALLAG Abdelhamid BENAKCHA Meriem ALLAG Ismail ZEIN mohamed yacine AYAD LGEB Laboratory Department of Electrical Engineering University of Biskra Biskra BP 145 Algeria R&D Industrial Hybrid Vehicle Applications Belfort 90010 France

The problem of state feedback controllers for a class of Takagi-Sugeno （T-S） Lipschitz nonlinear systems is investigated. A simple systematic and useful synthesis method is proposed based on the use of the differential mean value theorem （DMVT） and convex theory. The proposed design approach is based on the mean value theorem （MVT） to express the nonlinear error dynamics as a convex combination of known matrices with time varying coefficients as linear parameter varying （LPV） systems. Using the Lyapunov theory, stability conditions are obtained and expressed in terms of linear matrix inequalities （LMIs）. The controller gains are then obtained by solving linear matrix inequalities. The effectiveness of the proposed approach for closed loop-field oriented control （CL-FOC） of permanent magnet synchronous machine （PMSM） drives is demonstrated through an illustrative simulation for the proof of these approaches. Furthermore, an extension for controller design with parameter uncertainties and perturbation performance is discussed.

关键词： Takagi-Sugeno (T-S) fuzzy systems sectornonlinearity nonlinear controller linear matrix inequality(LMI) approach differential mean value theorem (DMVT),field oriented control (FOC) linear parameter varying(LPV)

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Introduction to Mesh Based Generated Lumped Parameter Models for Electromagnetic Problems

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CES Transactions on Electrical Machines and Systems 2021年第2期5卷 152-162页

作者： Shuo Yang Salim Asfirane Sami Hlioui Smail Mezani Guillaume Krebs yacine Amara Georges Barakat mohamed Gabsi Wei Hua Southeast University NanjingChina UniversitéLe Havre Normandie Conservatoire national des arts et métiers Universitéde Lorraine UniversitéParis-Saclay Facultédes Sciences d'Orsay ENS Paris-Saclay

This paper is an introduction to mesh based generated reluctance network *** overview of scientific works which led to the development of this approach is first *** concepts of the approach are then presented in the case of electromagnetic devices.A step-by-step procedure for coding the approach in the case of a flat linear permanent magnet machine is *** developed under MATLAB and Scilab environments are also included.

关键词： Lumped parameter modeling finite element method mesh electromagnetic devices modeling

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Thermodynamic Analysis of Hydrocarbon Refrigerants-Based Ethylene BOG Re-liquefaction System

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Journal of Marine Science and Application 2016年第3期15卷 321-330页

作者： Boumedienne M. Beladjine Ahmed Ouadha yacine Addad Laboratoire des Sciences et Ingenierie Maritimes Faculte de Genie Mecanique Universite des Sciences et de la Technologie Mohamed BOUDIAF d'Oran Oran E1-Mnouar 31000 Oran Algerie Khalifa University of Science Technology and Research P.O. Box 127788 Abu Dhabi UAE

The present study aims to make a thermodynamic analysis of an ethylene cascade re-liquefaction system that consists of the following two subsystems: a liquefaction cycle using ethylene as the working fluid and a refrigeration cycle operating with a hydrocarbon refrigerant. The hydrocarbon refrigerants considered are propane(R290), butane(R600), isobutane(R600a), and propylene(R1270). A computer program written in FORTRAN is developed to compute parameters for characteristic points of the cycles and the system's performance, which is determined and analyzed using numerical solutions for the refrigerant condensation temperature, temperature in tank, and temperature difference in the cascade condenser. Results show that R600 a gives the best performance, followed by(in order) R600, R290, and R1270. Furthermore, it is found that an increase in tank temperature improves system performance but that an increase in refrigerant condensation temperature causes deterioration. In addition, it is found that running the system at a low temperature difference in the cascade condenser is advantageous.

关键词： ethylene BOG re-liquefaction thermodynamic analysis hydrocarbon refrigerants

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Effect of Substrates on the Properties of ZnO Thin Films Grown by Pulsed Laser Deposition

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Advances in Materials Physics and Chemistry 2013年第4期3卷 209-213页

作者： Adel Taabouche Abderrahmane Bouabellou Fouad Kermiche Faouzi Hanini Sarah Menakh yacine Bouachiba Tahar Kerdja Chawki Benazzouz mohamed Bouafia Saad Amara Advanced Technology Development Center (CDTA) Baba-Hassen Algiers Algeria Center CRNA 2 Bd Franz Fanon Algiers Algeria Laboratory of Applied Optics Ferhat Abbas University Setif Algeria Thin Films and Interfaces Laboratory University of Constantine Constantine Algeria

Polycrystalline zinc oxide (ZnO) thin films have been deposited at 450°C onto glass and silicon substrates by pulsed laser deposition technique (PLD). The used source was a KrF excimer laser (248 nm, 25 ns, 5 Hz, 2 J/cm2). The effects of glass and silicon substrates on structural and optical properties of ZnO films have been investigated. X-ray diffraction patterns showed that ZnO films are polycrystalline with a hexagonal wurtzite—type structure with a strong (103) orientation and have a good crystallinity on monocrystalline Si(100) substrate. The thickness and compositional depth profile were studied by Rutherford Backscattering spectrometry (RBS). The average transmittance of ZnO films deposited on glass substrate in the visible range is 70%.

关键词： ZnO Thin Films PLD Silicon X-Ray Diffraction Optical Transmittance RBS

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Prevalence of Types of Arterial Hypertension in Pregnant Women at the Maternity Ward of the Centre Médical Communal Les Flamboyants Conakry Guinea

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Open Journal of Nephrology 2023年第3期13卷 234-245页

作者： Amadou Yaya Diallo Kadiatou Mamadou Bobo Barry Mamadou Malal Diallo Soriba Bangoura Bangoura Diallo Fatoumata Binta Oury Diallo Mamadou yacine Bah Aly Traoré mohamed Lamine Kaba Department of Nephrology and Haemodialysis CHU Donka Conakry Guinea Centre Médical Communal les Flamboyants Conakry Guinea

Introduction: Arterial hypertension (AH) during pregnancy is defined as systolic blood pressure greater than or equal to 140 mm Hg and/or diastolic blood pressure greater than or equal to 90 mm Hg on two (2) successive visits separated by at least 4 hours in a woman who has been at rest for 10 to 15 minutes in the seated position and then in the left lateral decubitus position. The aim of this study was to determine the prevalence and types of arterial hypertension among pregnant women in the maternity ward of the CMC les Flamboyants. Methods: This was a prospective descriptive study lasting six (6) months, from 1 October 2021 to 31 March 2022, of all pregnant women and/or parturients admitted to the maternity ward of the CMC les Flamboyants with a resting blood pressure (BP) greater than or equal to 140/90 mm Hg during the study period. Results: During the study period, we recorded 707 cases of pregnant and/or parturient women, 50 (7.07%) of whom were hypertensive. The average age of the patients was 29 years, with extremes of 18 and 41 years. The 20 - 29 age group was the most affected, with 26 cases (52%). Headache, dizziness and oedema of the lower limbs were constant in all cases. The risk factors for arterial hypertension were dominated by familial hypertension in 19 cases (38%), multiple gestures in 17 cases (34%) and a history of gestational hypertension in 16 cases (32%). Gestational age between 28 and 36 weeks’ amenorrhoea was the most common, with 20 cases (40%). Type I hypertension was most common on admission, with 34 cases (68%), followed by type II hypertension, with 8 cases (16%). Pre-eclampsia was the most frequent maternal complication with 27 cases (54%) followed by eclampsia with 15 cases (30%). Fetal distress was the most frequent fetal complication, 19 cases (38%), followed by death in utero 9 cases (18%). Conclusion: Compliance with consultation programmes and correct patient follow-up could help reduce maternal-foetal complications.

关键词： Hypertension Pregnant Women Maternity Unit Conakry Guinea

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