Pub Date : 2023-08-01DOI: 10.1080/10448632.2023.2227022
T. Nakajima
topological Hall
{"title":"Polarized Neutron Scattering Study on the Skyrmion Host Material Gd2PdSi3 – Results from Restarted JRR-3 –","authors":"T. Nakajima","doi":"10.1080/10448632.2023.2227022","DOIUrl":"https://doi.org/10.1080/10448632.2023.2227022","url":null,"abstract":"topological Hall","PeriodicalId":39014,"journal":{"name":"Neutron News","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49111933","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}
Pub Date : 2023-04-03DOI: 10.1080/10448632.2023.2190714
A. McDannald, M. Frontzek, A. Savici, M. Doucet, Efrain Rodriguez, Kate Meuse, Jessica Opsahl-Ong, Daniel Samarov, I. Takeuchi, W. Ratcliff, A. Gilad Kusne
We developed the Autonomous Neutron Diffraction Explorer (ANDiE) to autonomously perform neutron diffraction measurements to discover the magnetic ordering behavior in a material [ 1 ]. Neutron diffraction is one of the few techniques that can directly probe the magnetic ordering of the atoms in a material. As such beamtime at neutron diffraction facilities is in high demand. ANDiE is able to increase the measurement efficiency for discovering the magnetic order parameter and ordering behavior by a factor of about 5, thus making efficient use of the beamtime. The experiments to discover the magnetic order parameter and ordering behavior involve measuring the neutron diffraction patterns at many temperatures. Con-ventionally these measurements are scheduled ad hoc and take a significant amount of beamtime to perform. ANDiE, by contrast, uses Bayesian inference to determine the most informative temperatures at which to acquire diffraction patterns. ANDiE analyzes the powder neutron diffraction patterns, infers the temperature dependence, chooses the next temperature,
{"title":"ANDiE the Autonomous Neutron Diffraction Explorer","authors":"A. McDannald, M. Frontzek, A. Savici, M. Doucet, Efrain Rodriguez, Kate Meuse, Jessica Opsahl-Ong, Daniel Samarov, I. Takeuchi, W. Ratcliff, A. Gilad Kusne","doi":"10.1080/10448632.2023.2190714","DOIUrl":"https://doi.org/10.1080/10448632.2023.2190714","url":null,"abstract":"We developed the Autonomous Neutron Diffraction Explorer (ANDiE) to autonomously perform neutron diffraction measurements to discover the magnetic ordering behavior in a material [ 1 ]. Neutron diffraction is one of the few techniques that can directly probe the magnetic ordering of the atoms in a material. As such beamtime at neutron diffraction facilities is in high demand. ANDiE is able to increase the measurement efficiency for discovering the magnetic order parameter and ordering behavior by a factor of about 5, thus making efficient use of the beamtime. The experiments to discover the magnetic order parameter and ordering behavior involve measuring the neutron diffraction patterns at many temperatures. Con-ventionally these measurements are scheduled ad hoc and take a significant amount of beamtime to perform. ANDiE, by contrast, uses Bayesian inference to determine the most informative temperatures at which to acquire diffraction patterns. ANDiE analyzes the powder neutron diffraction patterns, infers the temperature dependence, chooses the next temperature,","PeriodicalId":39014,"journal":{"name":"Neutron News","volume":"34 1","pages":"6 - 7"},"PeriodicalIF":0.0,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44569421","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}
Pub Date : 2023-04-03DOI: 10.1080/10448632.2023.2190709
J. Armstrong, Xiao Wang, F. Fernandez-Alonso
The TOSCA neutron spectrometer at the ISIS Pulsed Neutron and Muon Source in the United Kingdom is pro-lific in both the quantity and the diversity of its research outputs. Science areas span a broad range of disciplines and these continue to grow, from energy materials and industrial catalysis to biology and pharmaceuticals. Complex sample environments have already become routine on the instrument, with a range of gas-dosing setups and a dedicated chemical-reaction rig to study catalytic and sustainable processes of direct relevance to the industrial sector. The instrument also supports additional and much-needed scientific capabilities beyond inelastic neutron scattering, including simultaneous diffraction and Raman scattering. More recent efforts have also been directed towards the implementation of in-situ illumination to explore light-driven phenomena. Aside from a handful of (rather heroic!) efforts in the past, high-pressure science has received little-to-no-attention to date. The high-pressure domain has always been a challenge for neutron spectroscopy, where the detected flux is modest, resulting in standard measurement times within the region of a few hours for gram-scale quantities of hydrogenous materials. A recent upgrade of the TOSCA primary spectrometer with a state-of-the-art neutron guide [ 1
{"title":"A New Frontier: High-pressure Neutron Science on TOSCA","authors":"J. Armstrong, Xiao Wang, F. Fernandez-Alonso","doi":"10.1080/10448632.2023.2190709","DOIUrl":"https://doi.org/10.1080/10448632.2023.2190709","url":null,"abstract":"The TOSCA neutron spectrometer at the ISIS Pulsed Neutron and Muon Source in the United Kingdom is pro-lific in both the quantity and the diversity of its research outputs. Science areas span a broad range of disciplines and these continue to grow, from energy materials and industrial catalysis to biology and pharmaceuticals. Complex sample environments have already become routine on the instrument, with a range of gas-dosing setups and a dedicated chemical-reaction rig to study catalytic and sustainable processes of direct relevance to the industrial sector. The instrument also supports additional and much-needed scientific capabilities beyond inelastic neutron scattering, including simultaneous diffraction and Raman scattering. More recent efforts have also been directed towards the implementation of in-situ illumination to explore light-driven phenomena. Aside from a handful of (rather heroic!) efforts in the past, high-pressure science has received little-to-no-attention to date. The high-pressure domain has always been a challenge for neutron spectroscopy, where the detected flux is modest, resulting in standard measurement times within the region of a few hours for gram-scale quantities of hydrogenous materials. A recent upgrade of the TOSCA primary spectrometer with a state-of-the-art neutron guide [ 1","PeriodicalId":39014,"journal":{"name":"Neutron News","volume":"34 1","pages":"4 - 5"},"PeriodicalIF":0.0,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46077325","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}
Pub Date : 2023-04-03DOI: 10.1080/10448632.2023.2191573
M. Nakano, H. Nakao
Biological membranes continuously change their physical properties, such as lipid composition and curvature, to regulate protein localization and activity, thereby directing biological phenomena. The curvature of biomembranes changes significantly during endocytosis/ exocytosis, intracellular vesicle trafficking, and cell divi-sion. Therefore, it is important to understand the relation-ship between the curvature and physicochemical properties of membranes to better understand the function of biological membranes. Experiments using vesicles as a model for biomembranes allow particles of different di-ameters to be prepared and evaluate how the curvature of the membrane affects its interaction with proteins. On the other hand, it is not fully understood how such changes in membrane curvature affect the properties of the membranes themselves and of the membrane lipids.
{"title":"Energy Diagram of Phospholipid Transfer from Membranes with Different Curvature Revealed by Time-Resolved Neutron Scattering","authors":"M. Nakano, H. Nakao","doi":"10.1080/10448632.2023.2191573","DOIUrl":"https://doi.org/10.1080/10448632.2023.2191573","url":null,"abstract":"Biological membranes continuously change their physical properties, such as lipid composition and curvature, to regulate protein localization and activity, thereby directing biological phenomena. The curvature of biomembranes changes significantly during endocytosis/ exocytosis, intracellular vesicle trafficking, and cell divi-sion. Therefore, it is important to understand the relation-ship between the curvature and physicochemical properties of membranes to better understand the function of biological membranes. Experiments using vesicles as a model for biomembranes allow particles of different di-ameters to be prepared and evaluate how the curvature of the membrane affects its interaction with proteins. On the other hand, it is not fully understood how such changes in membrane curvature affect the properties of the membranes themselves and of the membrane lipids.","PeriodicalId":39014,"journal":{"name":"Neutron News","volume":" ","pages":"10 - 12"},"PeriodicalIF":0.0,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42933191","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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