Pub Date : 2022-07-03DOI: 10.1080/10448632.2022.2094141
D. Louca, G. MacDougall, Travis J. Williams
EXECUTIVE SUMMARY The “US Muon Workshop 2021: A road map for a future Muon Facility” workshop was held virtually on February 1–2, 2021. The workshop aimed to bring together world experts in muon spectroscopy (μSR) and other techniques and interested stakeholders to evaluate the scientific need to construct a new μSR facility in the United States (US). The more than 200 participants highlighted several key scientific areas for μSR research, including quantum materials, hydrogen chemistry, and battery materials, and how each room could benefit from a new, high flux pulsed muon source. Experts also discussed aspects of the μSR technique, such as low-energy μSR, novel software developments, and beam and detector technologies that could enable revolutionary advances in μSR at a next-generation facility. The workshop concluded with a discussion of a concept being developed for a new μSR facility at the Spallation Neutron Source (SNS) of Oak Ridge National Laboratory (ORNL). That novel design concept was first envisioned by many of the same μSR experts at a workshop held previously at ORNL in 2016. The participants expressed that the current design had the potential to be a world-leading μSR facility and strongly encouraged the principal investigators to continue their work in order to refine the concept and determine instrument parameters that would enable new scientific opportunities. Muon Spin Rotation/Relaxation/ Resonance (μSR) is a technique that involves the use of spin-polarized muons that are implanted in a material to provide extremely sensitive measurements of the local magnetic field distribution within samples of scientific interest. The μSR technique has led to important results in condensed matter physics, chemistry, and semiconductor physics, among other fields. This technique is highly complementary to neutron scattering, and since the two techniques share a common user base, three of the four existing μSR facilities in the world are co-located with neutron sources. The exception is in North America, where the sole muon source is located at a meson accelerator laboratory in Vancouver, Canada. The United States has not had a μSR facility since the closure of LAMPF at Los Alamos National Laboratory, and never one that was globally competitive. Accordingly, there have been several efforts in recent years to address this shortcoming, most recently at ORNL beginning in 2016 and culminating with this workshop. Several recurring themes were identified during the workshop: the advantage of higher muon fluxes to enable new science, increasing demand for low-energy muon beams, the need for more software tools for muon site determination and analysis, and the role of multi-probe studies combining μSR with neutrons and other spectroscopic techniques. The primary method for enabling new science with μSR is higher flux muon beams. It is important for the detection of weak magnetic field phenomena delivers greater sensitivity to molecular levels and e
{"title":"Report from: US Muon Workshop 2021: A Road Map for a Future Muon Facility February 1-2, 2021","authors":"D. Louca, G. MacDougall, Travis J. Williams","doi":"10.1080/10448632.2022.2094141","DOIUrl":"https://doi.org/10.1080/10448632.2022.2094141","url":null,"abstract":"EXECUTIVE SUMMARY The “US Muon Workshop 2021: A road map for a future Muon Facility” workshop was held virtually on February 1–2, 2021. The workshop aimed to bring together world experts in muon spectroscopy (μSR) and other techniques and interested stakeholders to evaluate the scientific need to construct a new μSR facility in the United States (US). The more than 200 participants highlighted several key scientific areas for μSR research, including quantum materials, hydrogen chemistry, and battery materials, and how each room could benefit from a new, high flux pulsed muon source. Experts also discussed aspects of the μSR technique, such as low-energy μSR, novel software developments, and beam and detector technologies that could enable revolutionary advances in μSR at a next-generation facility. The workshop concluded with a discussion of a concept being developed for a new μSR facility at the Spallation Neutron Source (SNS) of Oak Ridge National Laboratory (ORNL). That novel design concept was first envisioned by many of the same μSR experts at a workshop held previously at ORNL in 2016. The participants expressed that the current design had the potential to be a world-leading μSR facility and strongly encouraged the principal investigators to continue their work in order to refine the concept and determine instrument parameters that would enable new scientific opportunities. Muon Spin Rotation/Relaxation/ Resonance (μSR) is a technique that involves the use of spin-polarized muons that are implanted in a material to provide extremely sensitive measurements of the local magnetic field distribution within samples of scientific interest. The μSR technique has led to important results in condensed matter physics, chemistry, and semiconductor physics, among other fields. This technique is highly complementary to neutron scattering, and since the two techniques share a common user base, three of the four existing μSR facilities in the world are co-located with neutron sources. The exception is in North America, where the sole muon source is located at a meson accelerator laboratory in Vancouver, Canada. The United States has not had a μSR facility since the closure of LAMPF at Los Alamos National Laboratory, and never one that was globally competitive. Accordingly, there have been several efforts in recent years to address this shortcoming, most recently at ORNL beginning in 2016 and culminating with this workshop. Several recurring themes were identified during the workshop: the advantage of higher muon fluxes to enable new science, increasing demand for low-energy muon beams, the need for more software tools for muon site determination and analysis, and the role of multi-probe studies combining μSR with neutrons and other spectroscopic techniques. The primary method for enabling new science with μSR is higher flux muon beams. It is important for the detection of weak magnetic field phenomena delivers greater sensitivity to molecular levels and e","PeriodicalId":39014,"journal":{"name":"Neutron News","volume":"33 1","pages":"8 - 21"},"PeriodicalIF":0.0,"publicationDate":"2022-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45666291","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 : 2022-07-01DOI: 10.1080/10448632.2022.2091387
S. M. Yusuf
Neutron News 2 Meeting Report The 7th Conference on Neutron Scattering 2021 (Hybrid), Mumbai, India The Conference on Neutron Scattering is one of the important events organized regularly by Bhabha Atomic Research Centre (BARC), India, in association with the Neutron Scattering Society of India (NSSI) to discuss recent advances in neutron scattering in the country and abroad. The 7th Conference on Neutron Scattering (CNS2021) was held during November 25-27, 2021 in Mumbai, India, in hybrid mode due to COVID19 pandemic restrictions. Nearly 200 participants, including 12 invited delegates from Asia-Oceania regions, the United States of America, and Europe, attended the conference. The organization of the conference in hybrid mode presented several challenges but also brought new opportunities. The conference was a showcase of research in condensed matter at neutron facilities and a meeting of an active scientific user community. Neutron scattering is an indispensable technique for investigating structure and dynamics in condensed matter, covering a vast multidisciplinary research spectrum. Solid State Physics Division (SSPD) of BARC carries out fundamental research in advanced magnetism, structure and dynamics, soft matter, nanostructured materials, and thin films using neutron scattering facilities at Dhruva. To promote neutron-based research in the country and to enhance the collaboration among the researchers, the “Conference on Neutron Scattering (CNS)”
{"title":"The 7th Conference on Neutron Scattering 2021 (Hybrid), Mumbai, India","authors":"S. M. Yusuf","doi":"10.1080/10448632.2022.2091387","DOIUrl":"https://doi.org/10.1080/10448632.2022.2091387","url":null,"abstract":"Neutron News 2 Meeting Report The 7th Conference on Neutron Scattering 2021 (Hybrid), Mumbai, India The Conference on Neutron Scattering is one of the important events organized regularly by Bhabha Atomic Research Centre (BARC), India, in association with the Neutron Scattering Society of India (NSSI) to discuss recent advances in neutron scattering in the country and abroad. The 7th Conference on Neutron Scattering (CNS2021) was held during November 25-27, 2021 in Mumbai, India, in hybrid mode due to COVID19 pandemic restrictions. Nearly 200 participants, including 12 invited delegates from Asia-Oceania regions, the United States of America, and Europe, attended the conference. The organization of the conference in hybrid mode presented several challenges but also brought new opportunities. The conference was a showcase of research in condensed matter at neutron facilities and a meeting of an active scientific user community. Neutron scattering is an indispensable technique for investigating structure and dynamics in condensed matter, covering a vast multidisciplinary research spectrum. Solid State Physics Division (SSPD) of BARC carries out fundamental research in advanced magnetism, structure and dynamics, soft matter, nanostructured materials, and thin films using neutron scattering facilities at Dhruva. To promote neutron-based research in the country and to enhance the collaboration among the researchers, the “Conference on Neutron Scattering (CNS)”","PeriodicalId":39014,"journal":{"name":"Neutron News","volume":" ","pages":"2 - 4"},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47811023","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 : 2022-06-17DOI: 10.1080/10448632.2022.2050641
M. Bersweiler, M. P. Adams, I. Peral, J. Kohlbrecher, Kiyonori Suzuki, A. Michels
Volume 33 • Number 2 • 2022 15 Science Snapshot Resolving the Complex Spin Structure in FeBased Soft Magnetic Nanocrystalline Material by Magnetic Small-Angle Neutron Scattering Mathias Bersweiler1, Michael P. Adams1, Inma Peral1, Joachim Kohlbrecher2, Kiyonori Suzuki3, and Andreas Michels1 1 Department of Physics and Materials Science, University of Luxembourg, Luxembourg, Grand Duchy of Luxembourg 2 Laboratory for Neutron Scattering, ETH Zurich & Paul Scherrer Institut, Villigen, Switzerland 3 Department of Materials Science and Engineering, Monash University, Clayton, VIC, Australia
{"title":"Resolving the Complex Spin Structure in Fe-Based Soft Magnetic Nanocrystalline Material by Magnetic Small-Angle Neutron Scattering","authors":"M. Bersweiler, M. P. Adams, I. Peral, J. Kohlbrecher, Kiyonori Suzuki, A. Michels","doi":"10.1080/10448632.2022.2050641","DOIUrl":"https://doi.org/10.1080/10448632.2022.2050641","url":null,"abstract":"Volume 33 • Number 2 • 2022 15 Science Snapshot Resolving the Complex Spin Structure in FeBased Soft Magnetic Nanocrystalline Material by Magnetic Small-Angle Neutron Scattering Mathias Bersweiler1, Michael P. Adams1, Inma Peral1, Joachim Kohlbrecher2, Kiyonori Suzuki3, and Andreas Michels1 1 Department of Physics and Materials Science, University of Luxembourg, Luxembourg, Grand Duchy of Luxembourg 2 Laboratory for Neutron Scattering, ETH Zurich & Paul Scherrer Institut, Villigen, Switzerland 3 Department of Materials Science and Engineering, Monash University, Clayton, VIC, Australia","PeriodicalId":39014,"journal":{"name":"Neutron News","volume":"33 1","pages":"15 - 17"},"PeriodicalIF":0.0,"publicationDate":"2022-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42955843","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 : 2022-05-18DOI: 10.1080/10448632.2022.2035571
J. G. Barker, J. Cook, J. P. Chabot, S. Kline, Zhenhuan Zhang, C. Gagnon
Three often overlooked sources of extraneous background scattering from surfaces in small angle neutron scattering (SANS) instruments have been examined in detail. Figure 1 shows schematically these sources: (i) the red ray shows a path from scattering of the direct beam off the beam stop which then scatters off the vessel lining and onto the detector; (ii) the blue ray shows a path from scattering from the sample onto the vessel lining and onto the detector; and (iii) the green ray shows a path from scattering from the sample onto the surrounding sample environment and onto the detector. The paper Barker et al. [1] describes scattering measurements, calculations and de-sign ideas to mitigate all three sources of background. affects accuracy of The from the rescatter from en-hance the empty The sample air from sample enhanced. The enhanced detector vessel 4% by nine position a further 16% the cross-section upon the sample-to-detector instruments using the at the NCNR, D33 at the and
本文详细研究了小角中子散射(SANS)仪器中来自表面的三种经常被忽视的外来背景散射源。图1显示了这些光源的示意图:(i)红色射线显示了直接光束从光束停止处散射的路径，然后从容器衬里散射到探测器上;(ii)蓝光显示了从样品散射到容器衬里和探测器的路径;(iii)绿色射线显示了从样品散射到周围样品环境并到达检测器的路径。论文Barker et al.[1]描述了散射测量、计算和设计思想，以减轻这三种背景源。影响精度，从散射增强从空样品空气从样品增强。增强型探测船使用NCNR, D33和NCNR，在样品到探测器仪器的横截面上又增加了16%
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Pub Date : 2022-03-28DOI: 10.1080/10448632.2022.2050621
Fankang Li, George E. Ehlers
Modulation of Intensity Emerging from Zero Effort (MIEZE) is a neutron resonant spin echo technique which allows one to measure the time correlation functions in materials by modulating the neutron beam using radio-frequency (RF) neutron spin flippers [1]. This technique avoids neutron spin manipulation between the sample and the detector, and thus could find applications in cases where the sample depolarizes the neutron beam. However, the finite sample size creates a variance in the neutron path length between the locations where scattering and detection happens, which causes the aberrations in Larmor phase. Such aberrations greatly limit the contrast in the intensity modulation towards long correlation times or large scattering angles. We propose two approaches to correct for such aberrations, which will enable us to extend those detection limits to longer times and larger angles. The first approach involves two additional magnetic Wollaston prisms (MWPs) in addition to the two RF flippers [2] and the second approach requires the physical tilting of the RF flippers in the primary spectrometer with respect to the beam direction [3]. Both approaches can shape the wave front of the intensity modulation at the sample position to compensate for the path variance from the sample and the detector. Therefore, the resolution function of MIEZE can be modified such that the contrast of the intensity modulation can be maximized at any scattering angle of interest. To correct for the phase aberration of MIEZE, both approaches involve the generation of a Larmor phase gradient along the transverse direction in the space domain. With such a phase gradient, it is possible to keep the wave front perpendicular to the scattering direction of interest. Therefore, the intensity modulation could propagate towards the detector with its wave front parallel to the detector surface, with which the aberration from the transverse size of the sample could be minimized, as shown in Figure 1. The employment of MWPs to steer the wave front of the intensity-modulated neutron beam is very similar to a phased array radar, which can create a beam of radio waves that can be electronically steered to point in different directions without moving the antennas. In this case, in additional to the traditional time focusing condition in MIEZE, i.e. (ω 2 (L 2 +L s ) = ω 1 (L 1 +L s )), the magnetic field required for the MWPs is determined by
{"title":"Larmor Phase Correction of MIEZE","authors":"Fankang Li, George E. Ehlers","doi":"10.1080/10448632.2022.2050621","DOIUrl":"https://doi.org/10.1080/10448632.2022.2050621","url":null,"abstract":"Modulation of Intensity Emerging from Zero Effort (MIEZE) is a neutron resonant spin echo technique which allows one to measure the time correlation functions in materials by modulating the neutron beam using radio-frequency (RF) neutron spin flippers [1]. This technique avoids neutron spin manipulation between the sample and the detector, and thus could find applications in cases where the sample depolarizes the neutron beam. However, the finite sample size creates a variance in the neutron path length between the locations where scattering and detection happens, which causes the aberrations in Larmor phase. Such aberrations greatly limit the contrast in the intensity modulation towards long correlation times or large scattering angles. We propose two approaches to correct for such aberrations, which will enable us to extend those detection limits to longer times and larger angles. The first approach involves two additional magnetic Wollaston prisms (MWPs) in addition to the two RF flippers [2] and the second approach requires the physical tilting of the RF flippers in the primary spectrometer with respect to the beam direction [3]. Both approaches can shape the wave front of the intensity modulation at the sample position to compensate for the path variance from the sample and the detector. Therefore, the resolution function of MIEZE can be modified such that the contrast of the intensity modulation can be maximized at any scattering angle of interest. To correct for the phase aberration of MIEZE, both approaches involve the generation of a Larmor phase gradient along the transverse direction in the space domain. With such a phase gradient, it is possible to keep the wave front perpendicular to the scattering direction of interest. Therefore, the intensity modulation could propagate towards the detector with its wave front parallel to the detector surface, with which the aberration from the transverse size of the sample could be minimized, as shown in Figure 1. The employment of MWPs to steer the wave front of the intensity-modulated neutron beam is very similar to a phased array radar, which can create a beam of radio waves that can be electronically steered to point in different directions without moving the antennas. In this case, in additional to the traditional time focusing condition in MIEZE, i.e. (ω 2 (L 2 +L s ) = ω 1 (L 1 +L s )), the magnetic field required for the MWPs is determined by","PeriodicalId":39014,"journal":{"name":"Neutron News","volume":"33 1","pages":"10 - 11"},"PeriodicalIF":0.0,"publicationDate":"2022-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42775745","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 : 2022-03-25DOI: 10.1080/10448632.2022.2050633
Thomas Arnold, A. Terry, E. Blackburn, U. Hejral, Zsuzsa Heyles, Andrew R. McCluskey, T. Nylander, Max Wolff
The 16 International Conference on Surface X-ray and Neutron Scattering took place virtually from the January 11–14, 2022. The conference series has a long history and have occurred roughly every 2 years between the first meeting in Marseille, France in 1989 and the fifteenth meeting in Pohang, Korea in 2018. Following this pattern, the sixteenth conference had originally been planned to be hosted by the European Spallation Source (ESS) and MaxIV Laboratory in Lund, Sweden, in the summer of 2020. Unfortunately, this had to be rearranged several times due to the evolving pandemic and its associated travel restrictions. It had been hoped that we could finally host a physical meeting in January this year. Plans for this were well advanced, but unfortunately, when the Omicron variant hit we were forced to move online about 6 weeks before the start of the conference. Despite these rather chaotic circumstances, the conference was able to go ahead successfully with about 180 registrations (Figure 1). The nature of an international online meeting means the attendance of the online sessions is always a fraction of the total registrations, however the organizers were pleasantly surprised by the sustained engagement from the attendees, with an average session attendance of around 80 and a peak at about 120. The conference was hosted using a combination of Zoom and the Gather.town platform, which allows the simulation of a virtual venue including a sponsor exhibition and poster boards. A key feature of this platform was that it ensured that the community could meet and chat in the coffee breaks and poster session, as if in a real venue. The platform Meeting Report
{"title":"The 16th International Conference on Surface X-ray and Neutron Scattering (SXNS16)","authors":"Thomas Arnold, A. Terry, E. Blackburn, U. Hejral, Zsuzsa Heyles, Andrew R. McCluskey, T. Nylander, Max Wolff","doi":"10.1080/10448632.2022.2050633","DOIUrl":"https://doi.org/10.1080/10448632.2022.2050633","url":null,"abstract":"The 16 International Conference on Surface X-ray and Neutron Scattering took place virtually from the January 11–14, 2022. The conference series has a long history and have occurred roughly every 2 years between the first meeting in Marseille, France in 1989 and the fifteenth meeting in Pohang, Korea in 2018. Following this pattern, the sixteenth conference had originally been planned to be hosted by the European Spallation Source (ESS) and MaxIV Laboratory in Lund, Sweden, in the summer of 2020. Unfortunately, this had to be rearranged several times due to the evolving pandemic and its associated travel restrictions. It had been hoped that we could finally host a physical meeting in January this year. Plans for this were well advanced, but unfortunately, when the Omicron variant hit we were forced to move online about 6 weeks before the start of the conference. Despite these rather chaotic circumstances, the conference was able to go ahead successfully with about 180 registrations (Figure 1). The nature of an international online meeting means the attendance of the online sessions is always a fraction of the total registrations, however the organizers were pleasantly surprised by the sustained engagement from the attendees, with an average session attendance of around 80 and a peak at about 120. The conference was hosted using a combination of Zoom and the Gather.town platform, which allows the simulation of a virtual venue including a sponsor exhibition and poster boards. A key feature of this platform was that it ensured that the community could meet and chat in the coffee breaks and poster session, as if in a real venue. The platform Meeting Report","PeriodicalId":39014,"journal":{"name":"Neutron News","volume":"33 1","pages":"2 - 4"},"PeriodicalIF":0.0,"publicationDate":"2022-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45519624","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 : 2022-03-25DOI: 10.1080/10448632.2022.2050629
H. Seto, Susumu Ikeda
KEK, High Energy Accelerator Research Organization, hold “The KEK 50 th Anniversary Ceremony and KEK 50 th Anniversary Symposium” from November 8 to 10, 2021. KEK was established in 1971 as the first Inter-University Research Institute in Japan. The main purpose of KEK was to construct and utilize large accelerator for high energy physics, but later, it extended scientific fields to materials and life sciences. The KENS neutron scattering facility was established in 1978 as a division of the Booster Synchrotron Utilization Facility (BSF) in KEK, and the first users’ research program using a pulsed spallation neutron source dedicated to material sciences started in 1980. Before KENS, scientists exploited electron linear accelerators as pulsed neutron sources for slowneutron scattering applications, including numerous types of time-offlight-based instruments. Prominent among these was the Tohoku Linac neutron source of Motoharu Kimura and his colleagues in the 1960s, where Noboru Watanabe cut his scientific teeth. Kazuhiko Inoue’s Electron Linac at Hokkaido University contributed to developing neutron moderators. Following the pioneering works on proton accelerator spallation neutron source in ANL, four facilities, KENS, ANL, LANL, and IPNS, with thermal and cold neutron sources at proton accelerator were constructed around 1980. The final check for KENS cold source on 500 MeV proton beam was finished in 1978. The first practical pulsed spallation neutron beam was introduced in June 1980, and all the information was delivered to the international neutron community soon through ICANS. In 1980, the proton beam power of KENS was only 1 kW, but upgraded to 5 kW in 1985 as well as neutron target was converted from tungsten to depleted uranium. KENS operated 13 instruments until 2004 and developed neutron technologies and grow many users as well as various kinds of scientific achievements. Based on the success of KENS, J-PARC project was approved and MLF has been constructed as one of the most intense spallation neutron facilities in the world. Thus, we would like to stress that 2020 was extremely important for the neutron community as the 40 th anniversary of KENS in the 50 years history of KEK. For this reason, the Institute of Materials Structure Science in KEK held an online symposium to celebrate the 40 th anniversary of spallation neutron and muon in Meeting Report
{"title":"The 50th Anniversary of KEK and the 40th Anniversary of KENS","authors":"H. Seto, Susumu Ikeda","doi":"10.1080/10448632.2022.2050629","DOIUrl":"https://doi.org/10.1080/10448632.2022.2050629","url":null,"abstract":"KEK, High Energy Accelerator Research Organization, hold “The KEK 50 th Anniversary Ceremony and KEK 50 th Anniversary Symposium” from November 8 to 10, 2021. KEK was established in 1971 as the first Inter-University Research Institute in Japan. The main purpose of KEK was to construct and utilize large accelerator for high energy physics, but later, it extended scientific fields to materials and life sciences. The KENS neutron scattering facility was established in 1978 as a division of the Booster Synchrotron Utilization Facility (BSF) in KEK, and the first users’ research program using a pulsed spallation neutron source dedicated to material sciences started in 1980. Before KENS, scientists exploited electron linear accelerators as pulsed neutron sources for slowneutron scattering applications, including numerous types of time-offlight-based instruments. Prominent among these was the Tohoku Linac neutron source of Motoharu Kimura and his colleagues in the 1960s, where Noboru Watanabe cut his scientific teeth. Kazuhiko Inoue’s Electron Linac at Hokkaido University contributed to developing neutron moderators. Following the pioneering works on proton accelerator spallation neutron source in ANL, four facilities, KENS, ANL, LANL, and IPNS, with thermal and cold neutron sources at proton accelerator were constructed around 1980. The final check for KENS cold source on 500 MeV proton beam was finished in 1978. The first practical pulsed spallation neutron beam was introduced in June 1980, and all the information was delivered to the international neutron community soon through ICANS. In 1980, the proton beam power of KENS was only 1 kW, but upgraded to 5 kW in 1985 as well as neutron target was converted from tungsten to depleted uranium. KENS operated 13 instruments until 2004 and developed neutron technologies and grow many users as well as various kinds of scientific achievements. Based on the success of KENS, J-PARC project was approved and MLF has been constructed as one of the most intense spallation neutron facilities in the world. Thus, we would like to stress that 2020 was extremely important for the neutron community as the 40 th anniversary of KENS in the 50 years history of KEK. For this reason, the Institute of Materials Structure Science in KEK held an online symposium to celebrate the 40 th anniversary of spallation neutron and muon in Meeting Report","PeriodicalId":39014,"journal":{"name":"Neutron News","volume":"33 1","pages":"5 - 6"},"PeriodicalIF":0.0,"publicationDate":"2022-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47678270","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 : 2022-03-18DOI: 10.1080/10448632.2022.2050656
A. Stamatopoulos, P. Koehler, A. Couture, B. DiGiovine, G. Rusev, J. Ullmann
Neutron News 12 Science Snapshot New Apparatus for Neutron Capture Measurements on Extra Small Radioactive Samples: The DICER Instrument at LANSCE A. Stamatopoulos1, P. Koehler1, A. Couture1, B. DiGiovine1, G. Rusev2 and J. Ullmann1 1 Physics Division, Los Alamos National Laboratory, Los Alamos, New Mexico, USA 2 Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico, USA athanasios.stamatopoulos@lanl.gov
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Pub Date : 2022-03-01DOI: 10.1080/10448632.2022.2035554
Rosalind A. de Laune, J. Cole
Neutron reflectivity has been used to take a look at buried interfaces in solar cells, to see how their structure could impact their performance. a of
中子反射率已被用于观察太阳能电池中的埋藏界面，以了解其结构如何影响其性能。一个的
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