C. Goodway, P. Mcintyre, A. Sears, Nadir Belkhier, G. Burgess, O. Kirichek, E. Lelièvre-Berna, F. Marchal, Sébastien Turc, S. Wakefield
Blue series top-loading furnaces are regularly used at neutron facilities to carry out experiments at up to 1700◦C. The sample temperature is controlled using the indirect resistance heating method which consists in placing the sample inside a radiating cylindrical heater made from vanadium or niobium into which a current of up to 180 A circulates. To prevent the oxydation and deterioration of the heated elements, the sample, the heater and the heat shields are in a secondary vacuum which limits very much the cooling rate. We present an automated fast-cooling technique which reduces the cool-down time by a factor of 4 to 5 without impacting the lifetime of the heated elements. This method is now routinely used at the ILL and ISIS facilities and reduces very much beam time losses.
{"title":"A fast-cooling mode for blue series furnaces","authors":"C. Goodway, P. Mcintyre, A. Sears, Nadir Belkhier, G. Burgess, O. Kirichek, E. Lelièvre-Berna, F. Marchal, Sébastien Turc, S. Wakefield","doi":"10.3233/jnr-190128","DOIUrl":"https://doi.org/10.3233/jnr-190128","url":null,"abstract":"Blue series top-loading furnaces are regularly used at neutron facilities to carry out experiments at up to 1700◦C. The sample temperature is controlled using the indirect resistance heating method which consists in placing the sample inside a radiating cylindrical heater made from vanadium or niobium into which a current of up to 180 A circulates. To prevent the oxydation and deterioration of the heated elements, the sample, the heater and the heat shields are in a secondary vacuum which limits very much the cooling rate. We present an automated fast-cooling technique which reduces the cool-down time by a factor of 4 to 5 without impacting the lifetime of the heated elements. This method is now routinely used at the ILL and ISIS facilities and reduces very much beam time losses.","PeriodicalId":44708,"journal":{"name":"Journal of Neutron Research","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2020-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3233/jnr-190128","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47765983","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Muon spectroscopy offers a uniquely sensitive method for exploring many mechanisms in chemistry and chemical physics through the study of muonium, a probe species formed during muon implantation that is chemically equivalent to hydrogen. Next generation experiments in the field of muonium chemistry will require reliable liquid handling systems, in-situ experimental capabilities and access to advanced methods such as Radio-Frequency (RF) muon spin resonance spectroscopy. This paper discusses the development and commissioning of systems for sample handling, describing details of two liquid panels suitable for deoxygenation and transfer of liquid samples, the development of a centre stick for an existing 4He flow cryostat suitable for RF muon chemistry experiments, a dedicated muon chemistry insert specifically optimized for RF liquid phase chemistry experiments, and a birdcage RF cavity optimized for high frequency measurements and with a geometry wellsuited for beamline experiments that exploit the chemistry insert. Example data is presented, demonstrating the application of these various pieces of equipment.
{"title":"Next generation equipment for muon chemistry research","authors":"M. Aramini, S. Cottrell, J. Peck, K. Yokoyama","doi":"10.3233/jnr-190118","DOIUrl":"https://doi.org/10.3233/jnr-190118","url":null,"abstract":"Muon spectroscopy offers a uniquely sensitive method for exploring many mechanisms in chemistry and chemical physics through the study of muonium, a probe species formed during muon implantation that is chemically equivalent to hydrogen. Next generation experiments in the field of muonium chemistry will require reliable liquid handling systems, in-situ experimental capabilities and access to advanced methods such as Radio-Frequency (RF) muon spin resonance spectroscopy. This paper discusses the development and commissioning of systems for sample handling, describing details of two liquid panels suitable for deoxygenation and transfer of liquid samples, the development of a centre stick for an existing 4He flow cryostat suitable for RF muon chemistry experiments, a dedicated muon chemistry insert specifically optimized for RF liquid phase chemistry experiments, and a birdcage RF cavity optimized for high frequency measurements and with a geometry wellsuited for beamline experiments that exploit the chemistry insert. Example data is presented, demonstrating the application of these various pieces of equipment.","PeriodicalId":44708,"journal":{"name":"Journal of Neutron Research","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2020-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3233/jnr-190118","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41250488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
D. Hajdú, E. Dian, E. Klinkby, C. Cooper-Jensen, J. Osán, P. Zagyvai
The neutron activation properties of the PE-B4C-concrete recently developed for the European Spallation Source (ESS) ERIC (European Spallation Source, https://europeanspallationsource.se/about) were investigated. On the one hand the concrete activation was compared to that of the ordinary concrete from which it was developed by means of irradiating concrete samples in the Budapest Research Reactor (BRR) (Budapest Neutron Centre, https://www.bnc.hu/). On the other hand, the measured activities were used to study the impact of input composition on Monte Carlo activation simulations. For this purpose, the complete course of the irradiation experiments were reproduced with MCNPX and Cinder90 simulations with nominal and measured elemental concrete compositions. Simulations suggest that for realistic activation predictions more detailed elemental compositions are required than the nominal ones. Energy-dispersive X-ray fluorescence (EDXRF) analysis technique was applied for this purpose, providing fair results for short-term activation estimations.
研究了新研制的用于欧洲散裂源(ESS) ERIC (European Spallation Source, https://europeanspallationsource.se/about)的pe - b4c混凝土的中子活化性能。一方面，混凝土活化与普通混凝土的活化进行了比较，普通混凝土是通过布达佩斯研究反应堆(BRR)(布达佩斯中子中心，https://www.bnc.hu/)中的辐照混凝土样品开发的。另一方面，测量的活度用于研究输入成分对蒙特卡罗激活模拟的影响。为此，用MCNPX和Cinder90模拟模拟了名义和实测混凝土元素成分，再现了辐照实验的完整过程。模拟表明，对于实际的活化预测，需要比名义上的更详细的元素组成。为此应用了能量色散x射线荧光(EDXRF)分析技术，为短期激活估计提供了公平的结果。
{"title":"Neutron activation properties of PE-B4C-concrete assessed by measurements and simulations","authors":"D. Hajdú, E. Dian, E. Klinkby, C. Cooper-Jensen, J. Osán, P. Zagyvai","doi":"10.3233/jnr-190126","DOIUrl":"https://doi.org/10.3233/jnr-190126","url":null,"abstract":"The neutron activation properties of the PE-B4C-concrete recently developed for the European Spallation Source (ESS) ERIC (European Spallation Source, https://europeanspallationsource.se/about) were investigated. On the one hand the concrete activation was compared to that of the ordinary concrete from which it was developed by means of irradiating concrete samples in the Budapest Research Reactor (BRR) (Budapest Neutron Centre, https://www.bnc.hu/). On the other hand, the measured activities were used to study the impact of input composition on Monte Carlo activation simulations. For this purpose, the complete course of the irradiation experiments were reproduced with MCNPX and Cinder90 simulations with nominal and measured elemental concrete compositions. Simulations suggest that for realistic activation predictions more detailed elemental compositions are required than the nominal ones. Energy-dispersive X-ray fluorescence (EDXRF) analysis technique was applied for this purpose, providing fair results for short-term activation estimations.","PeriodicalId":44708,"journal":{"name":"Journal of Neutron Research","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2020-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3233/jnr-190126","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42650625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
McStas ScatterLogger component bundle was adapted for evaluating a contribution to dose rate around neutron guides arising from prompt gamma radiation accompanying neutron capture in the supermirror guide coating upon specular reflection. Thickness of typical shielding materials needed to reduce this contribution to the desired level can be now evaluated directly from running a ray-tracing simulation of the instrument in McStas. An overview of the corresponding modifications to the existing McStas components and description of the newly written supplementary ones is given together with examples and use instructions.
{"title":"McStas and Scatter Logger driven calculations of prompt gamma shielding for neutron guides","authors":"R. Kolevatov","doi":"10.3233/jnr-190123","DOIUrl":"https://doi.org/10.3233/jnr-190123","url":null,"abstract":"McStas ScatterLogger component bundle was adapted for evaluating a contribution to dose rate around neutron guides arising from prompt gamma radiation accompanying neutron capture in the supermirror guide coating upon specular reflection. Thickness of typical shielding materials needed to reduce this contribution to the desired level can be now evaluated directly from running a ray-tracing simulation of the instrument in McStas. An overview of the corresponding modifications to the existing McStas components and description of the newly written supplementary ones is given together with examples and use instructions.","PeriodicalId":44708,"journal":{"name":"Journal of Neutron Research","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2020-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3233/jnr-190123","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44697372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
R. Oliveira-Silva, Agathe Belime, Clémence Le Coeur, Alexis Chennevière, A. Hélary, F. Cousin, P. Judeinstein, D. Sakellariou, J. Zanotti
. In soft condensed matter, Small Angle Neutron Scattering (SANS) is a central tool to probe structures with characteristic sizes ranging from 1 to 100 nm. However, when used as a standalone technique, the dynamic properties of the sample are not accessible. Nuclear Magnetic Resonance (NMR) is a versatile technique which can easily probe dynamical information. Here, we report on the coupling of a low-field NMR system to a SANS instrument. We show that this original set-up makes it possible to obtain structural information and to simultaneously extract in situ on a same sample, long-range translational diffusion coefficient, T 1 and T 2 nuclear spin relaxation times. Such a feature is of major interest when a sample experiences a transient physical state or evolves rapidly. We illustrate the capabilities of alliancing these experimental methods by following the critical temperature-induced phase separation of a concentrated Poly(Methacrylic Acid) solution at its Lower Critical Solution Temperature. The characteristic size related to the domain growth of the polymer-rich phase of the gel is monitored by the evolution of the SANS spectra, while the dynamics of the sol phase (H 2 O and polymer) is simultaneously characterized by NMR by measuring T 1 , T 2 and the diffusion coefficient. Great care has been taken to design a cell able to optimize the thermalization of the sample and in particular its equilibration time. Details are given on the sample cell specifically designed and manufactured for these experiments. The acquisition time needed to reach good signal-to-noise ratios, for both NMR and SANS, match: it is of the order of one hour. Altogether, we show that in situ low-field NMR/SANS coupling the NMR is meaningful and is a promising experimental approach.
{"title":"Coupling NMR to SANS: Addressing at once structure and dynamics in soft matter","authors":"R. Oliveira-Silva, Agathe Belime, Clémence Le Coeur, Alexis Chennevière, A. Hélary, F. Cousin, P. Judeinstein, D. Sakellariou, J. Zanotti","doi":"10.3233/jnr-190114","DOIUrl":"https://doi.org/10.3233/jnr-190114","url":null,"abstract":". In soft condensed matter, Small Angle Neutron Scattering (SANS) is a central tool to probe structures with characteristic sizes ranging from 1 to 100 nm. However, when used as a standalone technique, the dynamic properties of the sample are not accessible. Nuclear Magnetic Resonance (NMR) is a versatile technique which can easily probe dynamical information. Here, we report on the coupling of a low-field NMR system to a SANS instrument. We show that this original set-up makes it possible to obtain structural information and to simultaneously extract in situ on a same sample, long-range translational diffusion coefficient, T 1 and T 2 nuclear spin relaxation times. Such a feature is of major interest when a sample experiences a transient physical state or evolves rapidly. We illustrate the capabilities of alliancing these experimental methods by following the critical temperature-induced phase separation of a concentrated Poly(Methacrylic Acid) solution at its Lower Critical Solution Temperature. The characteristic size related to the domain growth of the polymer-rich phase of the gel is monitored by the evolution of the SANS spectra, while the dynamics of the sol phase (H 2 O and polymer) is simultaneously characterized by NMR by measuring T 1 , T 2 and the diffusion coefficient. Great care has been taken to design a cell able to optimize the thermalization of the sample and in particular its equilibration time. Details are given on the sample cell specifically designed and manufactured for these experiments. The acquisition time needed to reach good signal-to-noise ratios, for both NMR and SANS, match: it is of the order of one hour. Altogether, we show that in situ low-field NMR/SANS coupling the NMR is meaningful and is a promising experimental approach.","PeriodicalId":44708,"journal":{"name":"Journal of Neutron Research","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2020-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3233/jnr-190114","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46170939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Kibble, V. Laliena, C. Goodway, E. Lelièvre-Berna, K. Kamenev, S. Klotz, O. Kirichek
This work was performed within the world class Science and Innovation with Neutrons in Europe 2020 (“SINE 2020”) project, funded by the European Commission, Grant Agreement n°654000.
{"title":"Low-background materials for high pressure cells used in inelastic neutron scattering experiments","authors":"M. Kibble, V. Laliena, C. Goodway, E. Lelièvre-Berna, K. Kamenev, S. Klotz, O. Kirichek","doi":"10.3233/jnr-190115","DOIUrl":"https://doi.org/10.3233/jnr-190115","url":null,"abstract":"This work was performed within the world class Science and Innovation with Neutrons in Europe 2020 (“SINE 2020”) project, funded by the European Commission, Grant Agreement n°654000.","PeriodicalId":44708,"journal":{"name":"Journal of Neutron Research","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2020-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3233/jnr-190115","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42637152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Neutron Spin Echo methods (NSE) use Larmor labelling to measure the precession phase of the neutron beam polarization around well-defined magnetic fields. Scattering by a sample can affect the resulting precession phase providing information on the sample's structure and dynamics with high accuracy and resolution. A major limitation for the performance of Neutron Spin Echo instruments is the homogeneity of the precession magnetic fields. Here we investigate the influence of the new 'pancake' moderator, which is being built at the European Spallation Source, on the design of a Neutron Spin Echo spectrometer. The calculations show clear gains when the height to width ratios of the rectangular beam cross-sections mimic those of the ESS 'pancake' moderator beams. In such a case the homogeneity of the magnetic field integrals could improve by at least 30%. However, the calculations show that will not be possible to preserve a high resolution and at the same time reduce the length of the instrument. Consequently, NSE spectrometers will perform better at the ESS but they will not be substantially compacter than at other neutron sources e.g. ILL or FRM2.
{"title":"Semi-analytical calculations of intrinsic field magnetic field inhomogeneities for a Neutron Spin Echo spectrometer at the ESS","authors":"A. Kusmin, C. Pappas","doi":"10.3233/jnr-190121","DOIUrl":"https://doi.org/10.3233/jnr-190121","url":null,"abstract":"Neutron Spin Echo methods (NSE) use Larmor labelling to measure the precession phase of the neutron beam polarization around well-defined magnetic fields. Scattering by a sample can affect the resulting precession phase providing information on the sample's structure and dynamics with high accuracy and resolution. A major limitation for the performance of Neutron Spin Echo instruments is the homogeneity of the precession magnetic fields. Here we investigate the influence of the new 'pancake' moderator, which is being built at the European Spallation Source, on the design of a Neutron Spin Echo spectrometer. The calculations show clear gains when the height to width ratios of the rectangular beam cross-sections mimic those of the ESS 'pancake' moderator beams. In such a case the homogeneity of the magnetic field integrals could improve by at least 30%. However, the calculations show that will not be possible to preserve a high resolution and at the same time reduce the length of the instrument. Consequently, NSE spectrometers will perform better at the ESS but they will not be substantially compacter than at other neutron sources e.g. ILL or FRM2.","PeriodicalId":44708,"journal":{"name":"Journal of Neutron Research","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2020-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3233/jnr-190121","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48322713","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This double issue presents some of the work accomplished by two Joint Research Activities (JRAs) of the project World class Science and Innovation with Neutrons in Europe 2020 (SINE2020) financed by the European Commission under the 8th Framework Programme. Within these two JRAs entitled E-tools for Instrumentation and Sample Environment, efforts have been made to explore the full potential of the large scale facilities and enable challenging experiments required by the neutron and muon user communities. In the following pages, we present new McStas components based on Monte-Carlo algorithms to optimise the signal to background ratio, a decisive factor for the success of many experiments. The first McStas bundle allows evaluating one of the major contributions to dose rate around neutron guides. Combined with the next article presenting the investigation of the neutron activation properties of the PE-B4C-concrete recently developed for the European Spallation Source (ESS), this will help facilities to optimise the siting of guides and instruments. The second presented McStas bundle calculates neutron pathways through materials surrounding samples which are generally the most difficult to screen. For the first time, textured materials are considered, taking elastic and inelastic scattering into account, including multiple scattering. The article is followed by a review of different materials for building novel pressure cells for inelastic scattering whose measurements have allowed to determine the effective phonon generalised density of states of these materials, a prerequisite for performing simulations. The next two articles focus on pressure devices. The first one presents the developments of gasket-anvil assemblies for the Paris–Edinburgh cell with 30% improved pressure performance giving a similar signal-to-background ratio. It also describes an improved Bridgman seal package which makes the low-temperature operation of the PE press significantly more reliable. The second article describes a new cell for the investigation of hydrogen storage materials at pressures up to 700 bar and temperatures up to 500°C. The following articles present a simple but very efficient technique for reducing the cool-down times of blue series furnaces by a factor 4 to 5, a comprehensive suite of sample environment equipment for efficient running of muon chemistry experiments over a wide range of conditions, and a portable single-sided NMR setup adapted to a small angle neutron scattering instrument for retrieving both structural and dynamical informations from a single experiment. This issue ends with an article demonstrating that rectangular beam cross-sections with a height over width ratio which mimic the ESS “pancake” moderator beams will lead to an improved homogeneity of the magnetic field integrals of spin echo instruments and an introduction to SECoP, the international Sample Environment Communication Protocol developed on close collaboration with the Int
{"title":"Towards innovative, successful and cost-efficient use of beam time","authors":"E. Lelièvre-Berna, P. Willendrup","doi":"10.3233/jnr-200147","DOIUrl":"https://doi.org/10.3233/jnr-200147","url":null,"abstract":"This double issue presents some of the work accomplished by two Joint Research Activities (JRAs) of the project World class Science and Innovation with Neutrons in Europe 2020 (SINE2020) financed by the European Commission under the 8th Framework Programme. Within these two JRAs entitled E-tools for Instrumentation and Sample Environment, efforts have been made to explore the full potential of the large scale facilities and enable challenging experiments required by the neutron and muon user communities. In the following pages, we present new McStas components based on Monte-Carlo algorithms to optimise the signal to background ratio, a decisive factor for the success of many experiments. The first McStas bundle allows evaluating one of the major contributions to dose rate around neutron guides. Combined with the next article presenting the investigation of the neutron activation properties of the PE-B4C-concrete recently developed for the European Spallation Source (ESS), this will help facilities to optimise the siting of guides and instruments. The second presented McStas bundle calculates neutron pathways through materials surrounding samples which are generally the most difficult to screen. For the first time, textured materials are considered, taking elastic and inelastic scattering into account, including multiple scattering. The article is followed by a review of different materials for building novel pressure cells for inelastic scattering whose measurements have allowed to determine the effective phonon generalised density of states of these materials, a prerequisite for performing simulations. The next two articles focus on pressure devices. The first one presents the developments of gasket-anvil assemblies for the Paris–Edinburgh cell with 30% improved pressure performance giving a similar signal-to-background ratio. It also describes an improved Bridgman seal package which makes the low-temperature operation of the PE press significantly more reliable. The second article describes a new cell for the investigation of hydrogen storage materials at pressures up to 700 bar and temperatures up to 500°C. The following articles present a simple but very efficient technique for reducing the cool-down times of blue series furnaces by a factor 4 to 5, a comprehensive suite of sample environment equipment for efficient running of muon chemistry experiments over a wide range of conditions, and a portable single-sided NMR setup adapted to a small angle neutron scattering instrument for retrieving both structural and dynamical informations from a single experiment. This issue ends with an article demonstrating that rectangular beam cross-sections with a height over width ratio which mimic the ESS “pancake” moderator beams will lead to an improved homogeneity of the magnetic field integrals of spin echo instruments and an introduction to SECoP, the international Sample Environment Communication Protocol developed on close collaboration with the Int","PeriodicalId":44708,"journal":{"name":"Journal of Neutron Research","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2020-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3233/jnr-200147","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43899643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Neslihan Aslan, C. Horstmann, O. Metz, O. Kotlyar, M. Dornheim, C. Pistidda, S. Busch, W. Lohstroh, M. Müller, K. Pranzas
{"title":"High-pressure cell for in situ neutron studies of hydrogen storage materials","authors":"Neslihan Aslan, C. Horstmann, O. Metz, O. Kotlyar, M. Dornheim, C. Pistidda, S. Busch, W. Lohstroh, M. Müller, K. Pranzas","doi":"10.3233/jnr-190116","DOIUrl":"https://doi.org/10.3233/jnr-190116","url":null,"abstract":"","PeriodicalId":44708,"journal":{"name":"Journal of Neutron Research","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2020-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3233/jnr-190116","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46551031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
H. Amsil, A. Jalil, K. Embarch, H. Bounouira, Abdessamad DIDI, K. Laraki, H. Marah, A. Chetaine
The first installation around the tangential beam tube of the Moroccan TRIGA Mark II research reactor comprises combined instruments for Prompt Gamma Neutron Activation Analysis (PGAA) and Neutron Imaging (NI). The implementation of this project is divided over three main stages, namely the installation of the collimator and the primary beam shutter, which is a common section for introduction inside the reactor; the PGAA instruments’ installation; and finally, the installation of the PGNAA/NI combined instruments. The entire design was planned for this project, and detailed information about the first and the second stage is described in this work.
摩洛哥TRIGA Mark II研究堆的切向束流管周围的第一个装置包括快速伽马中子活化分析(PGAA)和中子成像(NI)的组合仪器。本工程的实施分为三个主要阶段，即准直器和主光束百叶窗的安装，主光束百叶窗是反应器内部引入的共同部分;PGAA仪器的安装;最后是PGNAA/NI组合仪器的安装。本设计对整个项目进行了规划，并详细介绍了第一阶段和第二阶段的设计情况。
{"title":"Conceptual implementation stages for Moroccan PGAA/NI instruments: STAGE I & II","authors":"H. Amsil, A. Jalil, K. Embarch, H. Bounouira, Abdessamad DIDI, K. Laraki, H. Marah, A. Chetaine","doi":"10.3233/JNR-200171","DOIUrl":"https://doi.org/10.3233/JNR-200171","url":null,"abstract":"The first installation around the tangential beam tube of the Moroccan TRIGA Mark II research reactor comprises combined instruments for Prompt Gamma Neutron Activation Analysis (PGAA) and Neutron Imaging (NI). The implementation of this project is divided over three main stages, namely the installation of the collimator and the primary beam shutter, which is a common section for introduction inside the reactor; the PGAA instruments’ installation; and finally, the installation of the PGNAA/NI combined instruments. The entire design was planned for this project, and detailed information about the first and the second stage is described in this work.","PeriodicalId":44708,"journal":{"name":"Journal of Neutron Research","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70093189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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