发布求助
文献互助 智能选刊 最新文献

Journal of Neutron Research最新文献

筛选
英文 中文
Development of high intensity neutron source at the European Spallation Source 高强度中子源在欧洲散裂源的发展
IF 1.1
Journal of Neutron Research Pub Date : 2020-02-10 DOI: 10.3233/jnr-200159
V. Santoro, K. Andersen, D. Dijulio, E. Klinkby, T. Miller, D. Milstead, G. Muhrer, M.Stroble, A. Takibayev, L. Zanini, O. Zimmer
{"title":"Development of high intensity neutron source at the European Spallation Source","authors":"V. Santoro, K. Andersen, D. Dijulio, E. Klinkby, T. Miller, D. Milstead, G. Muhrer, M.Stroble, A. Takibayev, L. Zanini, O. Zimmer","doi":"10.3233/jnr-200159","DOIUrl":"https://doi.org/10.3233/jnr-200159","url":null,"abstract":"The European Spallation Source being constructed in Lund, Sweden will provide the user community with a neutron source of unprecedented brightness. By 2025, a suite of 15 instruments will be served by a high-brightness moderator system placed above the spallation target. The ESS infrastructure, consisting of the proton linac, the target station, and the instrument halls, allows for implementation of a second source below the spallation target. We propose to develop a second neutron source with a high-intensity moderator able to (1) deliver a larger total cold neutron flux, (2) provide high intensities at longer wavelengths in the spectral regions of Cold (4–10 Å), Very Cold (10–40 Å), and Ultra Cold (several 100 Å) neutrons, as opposed to Thermal and Cold neutrons delivered by the top moderator. Offering both unprecedented brilliance, flux, and spectral range in a single facility, this upgrade will make ESS the most versatile neutron source in the world and will further strengthen the leadership of Europe in neutron science. The new source will boost several areas of condensed matter research such as imaging and spin-echo, and will provide outstanding opportunities in fundamental physics investigations of the laws of nature at a precision unattainable anywhere else. At the heart of the proposed system is a volumetric liquid deuterium moderator. Based on proven technology, its performance will be optimized in a detailed engineering study. This moderator will be complemented by secondary sources to provide intense beams of Very- and Ultra-Cold Neutrons.","PeriodicalId":44708,"journal":{"name":"Journal of Neutron Research","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2020-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3233/jnr-200159","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70093148","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}
引用次数: 13
Routines for optimizing neutron scattering instruments with McStas 用McStas优化中子散射仪器的例程
IF 1.1
Journal of Neutron Research Pub Date : 2020-01-29 DOI: 10.3233/jnr-190117
V. Laliena, M. V. Alvarez, J. D. Campo
{"title":"Routines for optimizing neutron scattering instruments with McStas","authors":"V. Laliena, M. V. Alvarez, J. D. Campo","doi":"10.3233/jnr-190117","DOIUrl":"https://doi.org/10.3233/jnr-190117","url":null,"abstract":"We acknowledge Grant No. PGC-2018-099024-B-I00 from Spanish Ministry of Science Innovation and Universities and funding from the project I-COOP B20319. This work was performed within the world class Science and Innovation with Neutrons in Europe 2020 (“SINE2020”) project, funded by the European Union’s Horizon 2020 research and innovation programme under grant agreement No. 654000.","PeriodicalId":44708,"journal":{"name":"Journal of Neutron Research","volume":"21 1","pages":"95-104"},"PeriodicalIF":1.1,"publicationDate":"2020-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3233/jnr-190117","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42039937","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}
引用次数: 2
Advances in the use of Paris-Edinburgh presses for high pressure neutron scattering 利用巴黎-爱丁堡压机进行高压中子散射的进展
IF 1.1
Journal of Neutron Research Pub Date : 2020-01-29 DOI: 10.3233/jnr-190120
S. Klotz, T. Hansen, E. Lelièvre-Berna, L. Amand, J. Maurice, C. Payre
{"title":"Advances in the use of Paris-Edinburgh presses for high pressure neutron scattering","authors":"S. Klotz, T. Hansen, E. Lelièvre-Berna, L. Amand, J. Maurice, C. Payre","doi":"10.3233/jnr-190120","DOIUrl":"https://doi.org/10.3233/jnr-190120","url":null,"abstract":"Paris-Edinburgh (PE) presses are nowadays the dominant high pressure devices for neutron scattering in the 10 GPa range and above. Here, we present developments of gasket-anvil assemblies with 30% improved pressure performance and considerably increased lifetime compared to the currently used “single-toroidal” anvils, and giving nevertheless a similar signal-to-background ratio. We also present an improved Bridgman seal package which makes the low-temperature operation of the PE press significantly more reliable. A systematic investigation of background sources in the “equatorial” scattering geometry is reported.","PeriodicalId":44708,"journal":{"name":"Journal of Neutron Research","volume":"21 1","pages":"117-124"},"PeriodicalIF":1.1,"publicationDate":"2020-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3233/jnr-190120","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47154425","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}
引用次数: 6
An introduction to SECoP – the sample environment communication protocol 介绍SECoP -示例环境通信协议
IF 1.1
Journal of Neutron Research Pub Date : 2020-01-29 DOI: 10.3233/jnr-190143
K. Kiefer, L. Rossa, Frank Wutzler, Niklas Ektröm, Anders Pettersson, E. Faulhaber, Markus Zolliker
{"title":"An introduction to SECoP – the sample environment communication protocol","authors":"K. Kiefer, L. Rossa, Frank Wutzler, Niklas Ektröm, Anders Pettersson, E. Faulhaber, Markus Zolliker","doi":"10.3233/jnr-190143","DOIUrl":"https://doi.org/10.3233/jnr-190143","url":null,"abstract":". The Sample Environment Communication Protocol (SECoP) serves as an international standard for the communication between sample environment equipment and the experiment control software at neutron and photon sources. It eases the integration of sample environment equipment supplied by external research groups and by industrial manufacturers. SECoP is designed to be simple, inclusive and self-describing. SECoP facilitates and structures the provision of metadata which is associated with sample environment equipment. Several existing implementations of SECoP support the development of SECoP-compatible sample environment control software. This article intro- duces SECoP Version 1.0, the first official version of SECoP published in September 2019. It was developed during the SINE2020 project in close cooperation with the International Society for Sample Environment. The complete specifications of SECoP Version 1.0 are available on GitHub.","PeriodicalId":44708,"journal":{"name":"Journal of Neutron Research","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2020-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3233/jnr-190143","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41549633","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}
引用次数: 2
A fast-cooling mode for blue series furnaces 蓝色系列炉的快速冷却模式
IF 1.1
Journal of Neutron Research Pub Date : 2020-01-29 DOI: 10.3233/jnr-190128
C. Goodway, P. Mcintyre, A. Sears, Nadir Belkhier, G. Burgess, O. Kirichek, E. Lelièvre-Berna, F. Marchal, Sébastien Turc, S. Wakefield
{"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":"21 1","pages":"137-142"},"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}
引用次数: 0
Next generation equipment for muon chemistry research 下一代介子化学研究设备
IF 1.1
Journal of Neutron Research Pub Date : 2020-01-29 DOI: 10.3233/jnr-190118
M. Aramini, S. Cottrell, J. Peck, K. Yokoyama
{"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":"103 27","pages":"143-154"},"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}
引用次数: 1
Neutron activation properties of PE-B4C-concrete assessed by measurements and simulations 通过测量和模拟评价pe - b4c混凝土的中子活化性能
IF 1.1
Journal of Neutron Research Pub Date : 2020-01-29 DOI: 10.3233/jnr-190126
D. Hajdú, E. Dian, E. Klinkby, C. Cooper-Jensen, J. Osán, P. Zagyvai
{"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":"21 1","pages":"87-94"},"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}
引用次数: 4
Low-background materials for high pressure cells used in inelastic neutron scattering experiments 用于非弹性中子散射实验的高压电池的低本底材料
IF 1.1
Journal of Neutron Research Pub Date : 2020-01-29 DOI: 10.3233/jnr-190115
M. Kibble, V. Laliena, C. Goodway, E. Lelièvre-Berna, K. Kamenev, S. Klotz, O. Kirichek
{"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":"21 1","pages":"105-116"},"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}
引用次数: 3
Semi-analytical calculations of intrinsic field magnetic field inhomogeneities for a Neutron Spin Echo spectrometer at the ESS ESS中子自旋回波光谱仪本征场磁场不均匀性的半解析计算
IF 1.1
Journal of Neutron Research Pub Date : 2020-01-29 DOI: 10.3233/jnr-190121
A. Kusmin, C. Pappas
{"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":"21 1","pages":"167-180"},"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}
引用次数: 0
McStas and Scatter Logger driven calculations of prompt gamma shielding for neutron guides McStas和Scatter Logger驱动中子导管的即时伽马屏蔽计算
IF 1.1
Journal of Neutron Research Pub Date : 2020-01-29 DOI: 10.3233/jnr-190123
R. Kolevatov
{"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":"21 1","pages":"79-85"},"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}
引用次数: 2
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信