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arXiv 2020年

作者： Noardo, Francesca Ohori, Ken Arroyo Biljecki, Filip Ellul, Claire Harrie, lars Krijnen, Thomas Eriksson, Helen van liempt, Jordi Pla, Maria Ruiz, Antonio Hintz, dean Krueger, Nina leoni, Cristina leoz, leire Moraru, diana Vitalis, Stelios Willkomm, Philipp Stoter, Jantien 3D Geoinformation Delft University of Technology Delft Netherlands Department of Architecture Department of Real Estate National University of Singapore Singapore Department of Civil Environmental and Geomatic Engineering University College London London United Kingdom Department of Physical Geography and Ecosystem Science Lund University Sweden Institut Cartogràfic i Geològic de Catalunya Spain Safe Software Surrey Canada M.O.S.S. Computer Grafik Systeme GmbH Taufkirchen Germany Department of Civil Constructional and Environmental Engineering Sapienza University of Rome Rome Italy Tracasa Pamplona Spain Ordnance Survey United Kingdom

OGC CityGMl is an open standard for 3d city models intended to foster interoperability and support various applications. However, through our practical experience and discussions with practitioners, we have noticed several problems related to the implementation of the standard and the use of standardized data. Nevertheless, a systematic investigation of these issues has never been performed, and there is thus insufficient evidence that can be used for tackling the problems. The GeoBIM benchmark project is aimed at finding such evidence by involving external volunteers, reporting on tools behaviour about relevant aspects (geometry, semantics, georeferencing, functionalities), analysed and described in this paper. This study explicitly pointed out the critical points embedded in the format as an evidence base for future development. This paper is in tandem with Part I, describing the results of the benchmark related to IFC, counterpart of CityGMl within building information modelling. Copyright © 2020, The Authors. All rights reserved.

关键词： Interoperability

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Considerations and Recommendations from the ISMRM diffusion Study Group for preclinical diffusion MRI: Part 1 — In vivo small-animal imaging

arXiv

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arXiv 2022年

作者： Jelescu, Ileana O. Grussu, Francesco Ianus, Andrada Hansen, Brian Barrett, Rachel l.C. Aggarwal, Manisha Michielse, Stijn Nasrallah, Fatima Syeda, Warda Wang, Nian Veraart, Jelle Roebroeck, Alard Bagdasarian, Andrew F. Eichner, Cornelius Sepehrband, Farshid Zimmermann, Jan Soustelle, lucas Bowman, Christien Tendler, Benjamin C. Hertanu, Andreea Jeurissen, Ben Verhoye, Marleen Frydman, lucio de looij, Yohan van Hike, david dunn, Jeff F. Miller, Karla landman, Bennett A. Shemesh, Noam Anderson, Adam McKinnon, Emilie Farquharson, Shawna Acqua, Flavio dell Pierpaoli, Carlo drobnjak, Ivana leemans, Alexander Harkins, Kevin d. descoteaux, Maxime Xu, duan Huang, Hao Santin, Mathieu d. Grant, Samuel C. Obenaus, Andre Kim, Gene S. Wu, dan le Bihan, denis Blackband, Stephen J. Ciobanu, luisa Fieremans, Els Bai, Ruiliang leergaard, Trygve B. Zhang, Jiangyang dyrby, Tim B. Johnson, G. Allan Cohen-Adad, Julien Budde, Matthew d. Schilling, Kurt G. Department of Radiology Lausanne University Hospital University of Lausanne Lausanne Switzerland CIBM Center for Biomedical Imaging Ecole Polytechnique Fédérale de Lausanne Lausanne Switzerland Radiomics Group Vall d’Hebron Institute of Oncology Vall d’Hebron Barcelona Hospital Campus Barcelona Spain Queen Square MS Centre Queen Square Institute of Neurology Faculty of Brain Sciences University College London London United Kingdom Champalimaud Research Champalimaud Foundation Lisbon Portugal Center of Functionally Integrative Neuroscience Aarhus University Aarhus Denmark Department of Neuroimaging Institute of Psychiatry Psychology and Neuroscience King's College London London United Kingdom NatBrainLab Department of Forensics and Neurodevelopmental Sciences Institute of Psychiatry Psychology and Neuroscience King's College London London United Kingdom Russell H. Morgan Department of Radiology and Radiological Science Johns Hopkins University School of Medicine BaltimoreMD United States Maastricht University Medical Center Maastricht Netherlands The Queensland Brain Institute The University of Queensland Queensland Australia Melbourne Neuropsychiatry Centre The University of Melbourne ParkvilleVIC Australia Department of Radiology and Imaging Sciences Indiana University IN United States Stark Neurosciences Research Institute Indiana University School of Medicine IN United States Center for Biomedical Imaging NYU Grossman School of Medicine New YorkNY United States Faculty of psychology and Neuroscience Maastricht University Maastricht Netherlands Department of Chemical & Biomedical Engineering FAMU-FSU College of Engineering Florida State University TallahasseeFL United States Center for Interdisciplinary Magnetic Resonance National HIgh Magnetic Field Laboratory TallahasseeFL United States Department of Neuropsychology Max Planck Institute for Human Cognitive and Brain Sciences Leipzig Germany USC Stevens Neuroimaging and Informatics Instit

Small-animal diffusion MRI (dMRI) has been used for methodological development and validation, characterizing the biological basis of diffusion phenomena, and comparative anatomy. The steps from animal setup and monitoring, to acquisition, analysis, and interpretation are complex, with many decisions that may ultimately affect what questions can be answered using the resultant data. This work aims to present selected recommendations and guidelines from the diffusion community, on best practices for preclinical dMRI of in vivo animals. We describe the general considerations and foundational knowledge that must be considered when designing experiments. We briefly describe differences in animal species and disease models and discuss why some may be more or less appropriate for different studies. We then give guidelines for in vivo acquisition protocols, including decisions on hardware, animal preparation, and imaging sequences, followed by advice for data processing including pre-processing, model-fitting, and tractography. Finally, we provide an online resource which lists publicly available preclinical dMRI datasets and software packages, to promote responsible and reproducible research. In each section, we attempt to provide guides and recommendations, but also highlight areas for which no guidelines exist (and why), and where future work should focus. While we mainly cover the central nervous system (on which most preclinical dMRI studies are focused), we also provide, where possible and applicable, recommendations for other organs of interest. An overarching goal herein is to enhance the rigor and reproducibility of small animal dMRI acquisitions and analyses, and thereby advance biomedical knowledge. © 2022, CC BY-NC-Nd.

关键词： Invertebrates

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The Future of Real Estate Education: A Multi-Faceted Perspective

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Journal of Real Estate Practice and Education 2020年第1期22卷 40-55页

作者： Karen McGrath Bing Wang Barbara Jackson Annette Kämpf-dern Kent Malone david Funk Tom G. Geurts a Accounting and Financial Management Bucknell University Lewisburg PA USA b Real Estate and the Built Environment Graduate School of Design Harvard University Cambridge MA USA c Franklin L. Burns School of Real Estate and Construction Management Daniels College of Business University of Denver Denver CO USA d Sustainable Management of Built Environments Faculty of Civil Engineering Bauhaus-Universität Weimar Weimar Germany e Tennison Holdings LLC Gainesville FL USA f American Real Estate Society Athens OH USA

This paper is the culmination of efforts by a group of participants at the32ndAnnual American Real Estate Society Conferencein denver who met to discuss the future of real estate education, and its authors represent the diversity and breadth reflective of the field itself. Previous literature, spanning more than 50 years, has consistently maintained that the issues related to the study of real estate are too complex to easily resolve, resulting in a lack of consensus regarding an accepted body of knowledge. This paper is unique in that it not only identifies issues and challenges inherent in today’s academic climate, it also provides for a collection of options, both applied and aspirational, that build on existing and potential structures. Indeed, the authors do not believe that there is onebestmodel for the future of real estate education, nor that we should expect there to be. Rather, this paper is an important addition to the existing body of literature for its identification of solutions that embrace the breadth of both practical and academic knowledge in the expansive and ever-evolving field of real estate.

关键词： Real estate education real estate degree programs

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damping of inter-area mode oscillations by $\pmb{H}_{\infty}$ loop shaping technique based UPFC controller

Damping of inter-area mode oscillations by $\pmb{H}_{\infty}...

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National Power Systems Conference (NPSC)

作者： Bhavin J. Shah G. N. Pillai Pramod Agarwal Hemant N. Raval Dept. of Electrical Engineering L.D. College of Engineering Ahmedabad India Dept. of Electrical Engineering Indian Institute of Technology Roorkee India

This paper presents a procedure for the robust design of an SdC for a UPFC device for damping inter-area mode oscillations in the large power system. The controller is designed by H ∞ loop shaping technique using lMI. The controller is designed for modified New England test system which includes a UPFC. The input signals to the controller are obtained from PMUs located at an important buses of the test system. For deciding the best control signal as input to the controller, residue analysis was carried out. The minimum damping ratio (10%) is ensured with by adding pole placement objective in the controller design. The robustness of the UPFC WAdC is accessed via nonlinear time domain simulations for various contingency conditions like line fault, line outage, and load shedding. The performance of the UPFC W AdC is found satisfactory for such contingency conditions.

关键词： damping Oscillators load flow Power system stability Generators Reduced order systems Phasor measurement units

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Measurement of spin-density matrix elements in ρ(770) production with a linearly polarized photon beam at Eγ=8.2–8.8 GeV

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Physical Review C 2023年第5期108卷 055204-055204页

作者： S. Adhikari F. Afzal C. S. Akondi M. Albrecht M. Amaryan V. Arroyave A. Asaturyan A. Austregesilo Z. Baldwin F. Barbosa J. Barlow E. Barriga R. Barsotti T. d. Beattie V. V. Berdnikov T. Black W. Boeglin W. J. Briscoe T. Britton W. K. Brooks d. Byer E. Chudakov P. l. Cole O. Cortes V. Crede M. M. dalton d. darulis A. deur S. dobbs A. dolgolenko R. dotel M. dugger R. dzhygadlo d. Ebersole M. Edo H. Egiyan T. Erbora P. Eugenio A. Fabrizi C. Fanelli S. Fang S. Fegan J. Fitches A. M. Foda S. Furletov l. Gan H. Gao A. Gardner A. Gasparian C. Gleason K. Goetzen V. S. Goryachev B. Grube J. Guo l. Guo T. J. Hague H. Hakobyan J. Hernandez N. d. Hoffman d. Hornidge G. Hou G. M. Huber P. Hurck A. Hurley W. Imoehl d. G. Ireland M. M. Ito I. Jaegle N. S. Jarvis T. Jeske R. T. Jones V. Kakoyan G. Kalicy V. Khachatryan M. Khatchatryan C. Kourkoumelis A. laduke I. larin d. lawrence d. I. lersch H. li B. liu K. livingston G. J. lolos l. lorenti V. lyubovitskij R. Ma d. Mack A. Mahmood H. Marukyan V. Matveev M. McCaughan M. McCracken C. A. Meyer R. Miskimen R. E. Mitchell K. Mizutani V. Neelamana l. Ng E. Nissen S. Orešić A. I. Ostrovidov Z. Papandreou C. Paudel R. Pedroni l. Pentchev K. J. Peters E. Prather S. Rakshit J. Reinhold A. Remington B. G. Ritchie J. Ritman G. Rodriguez d. Romanov K. Saldana C. Salgado S. Schadmand A. M. Schertz K. Scheuer A. Schick A. Schmidt R. A. Schumacher J. Schwiening P. Sharp X. Shen M. R. Shepherd A. Smith E. S. Smith d. I. Sober A. Somov S. Somov J. R. Stevens I. I. Strakovsky B. Sumner K. Suresh V. V. Tarasov S. Taylor A. Teymurazyan A. Thiel T. Viducic T. Whitlatch N. Wickramaarachchi M. Williams Y. Wunderlich B. Yu J. Zarling Z. Zhang Z. Zhao J. Zhou X. Zhou B. Zihlmann Department of Physics Old Dominion University Norfolk Virginia 23529 USA Helmholtz-Institut für Strahlen- und Kernphysik Universität Bonn D-53115 Bonn Germany Department of Physics Florida State University Tallahassee Florida 32306 USA Thomas Jefferson National Accelerator Facility Newport News Virginia 23606 USA Department of Physics Florida International University Miami Florida 33199 USA Department of Physics and Physical Oceanography University of North Carolina at Wilmington Wilmington North Carolina 28403 USA A. I. Alikhanyan National Science Laboratory (Yerevan Physics Institute) 0036 Yerevan Armenia Department of Physics Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA Department of Physics Indiana University Bloomington Indiana 47405 USA Department of Physics University of Regina Regina Saskatchewan S4S 0A2 Canada Department of Physics The Catholic University of America Washington D.C. 20064 USA Department of Physics The George Washington University Washington D.C. 20052 USA Departamento de Física Universidad Técnica Federico Santa María Casilla 110-V Valparaíso Chile Department of Physics Duke University Durham North Carolina 27708 USA Department of Physics Lamar University Beaumont Texas 77710 USA School of Physics and Astronomy University of Glasgow Glasgow G12 8QQ United Kingdom National Research Centre Kurchatov Institute Moscow 123182 Russia Polytechnic Sciences and Mathematics School of Applied Sciences and Arts College of Integrative Sciences and Arts Arizona State University Tempe Arizona 85287 USA GSI Helmholtzzentrum für Schwerionenforschung GmbH D-64291 Darmstadt Germany Department of Physics University of Connecticut Storrs Connecticut 06269 USA Department of Physics University of Massachusetts Amherst Massachusetts 01003 USA Department of Physics William & Mary Williamsburg Virginia 23185 USA Institute of High Energy Physics Beijing 100049 People's Republic of China Department of Physics North Caro

The GlueX experiment at Jefferson lab studies photoproduction of mesons using linearly polarized 8.5GeV photons impinging on a hydrogen target which is contained within a detector with near-complete coverage for charged and neutral particles. We present measurements of spin-density matrix elements for the photoproduction of the vector meson ρ(770). The statistical precision achieved exceeds that of previous experiments for polarized photoproduction in this energy range by orders of magnitude. We confirm a high degree of s-channel helicity conservation at small squared four-momentum transfer t and are able to extract the t dependence of natural- and unnatural-parity exchange contributions to the production process in detail. We confirm the dominance of natural-parity exchange over the full t range. We also find that helicity amplitudes in which the helicity of the incident photon and the photoproduced ρ(770) differ by two units are negligible for −t<0.5GeV2/c2.

关键词： Hadron production Photonuclear reactions Polarization phenomena Strong interaction Vector mesons

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Considerations and recommendations from the ISMRM diffusion Study Group for preclinical diffusion MRI: Part 2 — Ex vivo imaging: added value and acquisition

arXiv

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arXiv 2022年

作者： Schilling, Kurt G. Grussu, Francesco Ianus, Andrada Hansen, Brian Howard, Amy F.d. Barrett, Rachel l.C. Aggarwal, Manisha Michielse, Stijn Nasrallah, Fatima Syeda, Warda Wang, Nian Veraart, Jelle Roebroeck, Alard Bagdasarian, Andrew F. Eichner, Cornelius Sepehrband, Farshid Zimmermann, Jan Soustelle, lucas Bowman, Christien Tendler, Benjamin C. Hertanu, Andreea Jeurissen, Ben Verhoye, Marleen Frydman, lucio de looij, Yohan van Hike, david dunn, Jeff F. Miller, Karla landman, Bennett A. Shemesh, Noam Anderson, Adam McKinnon, Emilie Farquharson, Shawna Acqua, Flavio dell Pierpaoli, Carlo drobnjak, Ivana leemans, Alexander Harkins, Kevin d. descoteaux, Maxime Xu, duan Huang, Hao Santin, Mathieu d. Grant, Samuel C. Obenaus, Andre Kim, Gene S. Wu, dan le Bihan, denis Blackband, Stephen J. Ciobanu, luisa Fieremans, Els Bai, Ruiliang leergaard, Trygve B. Zhang, Jiangyang dyrby, Tim B. Allan Johnson, G. Cohen-Adad, Julien Budde, Matthew d. Jelescu, Ileana O. Radiology and Radiological Sciences Vanderbilt University Medical Center NashvilleTN United States Vanderbilt University Institute of Imaging Science Vanderbilt University NashvilleTN United States Radiomics Group Vall d’Hebron Institute of Oncology Vall d’Hebron Barcelona Hospital Campus Barcelona Spain Queen Square MS Centre Queen Square Institute of Neurology Faculty of Brain Sciences University College London London United Kingdom Champalimaud Research Champalimaud Foundation Lisbon Portugal Center of Functionally Integrative Neuroscience Aarhus University Aarhus Denmark Department of Bioengineering Imperial College London London United Kingdom FMRIB Centre Wellcome Centre for Integrative Neuroimaging Nuffield Department of Clinical Neurosciences University of Oxford Oxford United Kingdom Department of Neuroimaging Institute of Psychiatry Psychology and Neuroscience King's College London London United Kingdom NatBrainLab Department of Forensics and Neurodevelopmental Sciences Institute of Psychiatry Psychology and Neuroscience King's College London London United Kingdom Russell H. Morgan Department of Radiology and Radiological Science Johns Hopkins University School of Medicine BaltimoreMD United States Maastricht University Medical Center Maastricht Netherlands The Queensland Brain Institute The University of Queensland Queensland Australia Melbourne Neuropsychiatry Centre The University of Melbourne ParkvilleVIC Australia Department of Radiology and Imaging Sciences Indiana University IN United States Stark Neurosciences Research Institute Indiana University School of Medicine IN United States Center for Biomedical Imaging NYU Grossman School of Medicine New YorkNY United States Faculty of psychology and Neuroscience Maastricht University Maastricht Netherlands Department of Chemical & Biomedical Engineering FAMU-FSU College of Engineering Florida State University TallahasseeFL United States Center for Interdisciplinary Magnetic Re

The value of preclinical diffusion MRI (dMRI) is substantial. While dMRI enables in vivo non-invasive characterization of tissue, ex vivo dMRI is increasingly being used to probe tissue microstructure and brain connectivity. Ex vivo dMRI has several experimental advantages including higher signal-to-noise ratio (SNR) and spatial resolution compared to in vivo studies, and enabling more advanced diffusion contrasts for improved microstructure and connectivity characterization. Another major advantage of ex vivo dMRI is the direct comparison with histological data, as a crucial methodological validation. However, there are a number of considerations that must be made when performing ex vivo experiments. The steps from tissue preparation, image acquisition and processing, and interpretation of results are complex, with many decisions that not only differ dramatically from in vivo imaging of small animals, but ultimately affect what questions can be answered using the data. This work represents "Part 2" of a 3-part series of recommendations and considerations for preclinical dMRI. We describe best practices for dMRI of ex vivo tissue, with a focus on the value that ex vivo imaging adds to the field of dMRI and considerations in ex vivo image acquisition. We first give general considerations and foundational knowledge that must be considered when designing experiments. We briefly describe differences in specimens and models and discuss why some may be more or less appropriate for different studies. We then give guidelines for ex vivo protocols, including tissue fixation, sample preparation, and MR scanning. In each section, we attempt to provide guidelines and recommendations, but also highlight areas for which no guidelines exist (and why), and where future work should lie. An overarching goal herein is to enhance the rigor and reproducibility of ex vivo dMRI acquisitions and analyses, and thereby advance biomedical knowledge. © 2022, CC BY.

关键词： Image acquisition

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An $8\times 4$ Continuous Transverse Stub Array Fed by Coaxial Ports

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IEEE Antennas and Wireless Propagation letters 2019年第6期18卷 1303-1307页

作者： Siyi Zhou Mauro Ettorre Anthony Grbic Institut d’Electronique et de Télécommunications de Rennes (IETR) UMR CNRS 6164 Université de de Rennes 1 Rennes Cedex France Radiation Laboratory Department of Electrical Engineering and Computer Science and Center of Photonic and Multiscale Materials University of Michigan Ann Arbor MI USA

Continuous transverse stub arrays are wideband, wide-scanning antennas consisting of an arrangement of long slots or parallel-plate waveguide apertures radiating in free space. A line source is generally required to feed these arrays. Here, we show that such a line source can be created over the radiating aperture using a two-dimensional (2-d) arrangement of coaxial probe transitions. The coaxial transitions are directly integrated into the parallel-plate waveguides feeding the slots. Such a solution avoids using quasi-optical systems or bulky corporate networks to feed the array. The proposed 2-d feeding scheme also allows steering the main beam of the array. This is an additional benefit with respect to previous designs for which scanning was limited to a single plane. An array of 8 × 4 elements validates the concept at 5.8 GHz. Measurements show that the array exhibits a field of view of ±30° in elevation over the 5.4-6.2 GHz band, with an active reflection coefficient for the central elements better than -10 dB.

关键词： Probes Antenna arrays Antenna measurements Antenna radiation patterns computer architecture Two dimensional displays Microprocessors

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Status and future development of Heating and Current drive for the EU dEMO

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FUSION engineering ANd dESIGN 2022年第0期180卷 1页

作者： Tran, M. Q. Agostinetti, P. Aiello, G. Avramidis, K. Baiocchi, B. Barbisan, M. Bobkov, V. Briefi, S. Bruschi, A. Chavan, R. Chelis, I. day, Ch. delogu, R. Ell, B. Fanale, F. Fassina, A. Fantz, U. Faugel, H. Figini, l. Fiorucci, d. Friedl, R. Franke, Th Gantenbein, G. Garavaglia, S. Granucci, G. Hanke, S. Hogge, J. -p. Hopf, C. Kostic, A. Illy, S. Ioannidis, Z. Jelonnek, J. Jin, J. latsas, G. louche, F. Maquet, V. Maggiora, R. Messiaen, A. Milanesio, d. Mimo, A. Moro, A. Ochoukov, R. Ongena, J. Pagonakis, I. G. Peponis, d. Pimazzoni, A. Ragona, R. Rispoli, N. Ruess, T. Rzesnicki, T. Scherer, T. Spaeh, P. Starnella, G. Strauss, d. Thumm, M. Tierens, W. Tigelis, I. Tsironis, C. Usoltceva, M. Van Eester, d. Veronese, F. Vincenzi, P. Wagner, F. Wu, C. Zeus, F. Zhang, W. [a]Ecole Polytechnique Fédérale de Lausanne (EPFL) Swiss Plasma Center (SPC) Station 13 Lausanne 1015 Switzerland [b]Consorzio RFX (CNR ENEA INFN Università di Padova Acciaierie Venete SpA Corso Stati Uniti 4 Padova I-35127 Italy [c]IAM-AWP Karlsruhe Institute of Technology (KIT) Kaiserstr. 12 Karlsruhe 76131 Germany [d]IHM Karlsruhe Institute of Technology (KIT) Kaiserstr. 12 Karlsruhe 76131 Germany [e]Institute for Plasma Science and Technology National Research Council (ISTP-CNR) via Cozzi 53 Milan 20125 Italy [f]Max Planck Institute for Plasma Physics Boltzmann Strasse 2 Garching 85748 Germany [g]National and Kapodistrian University of Athens Department of Physics Zografou Athens GR-157 84 Greece [h]ITEP Karlsruhe Institute of Technology (KIT) Campus North Hermann-von-Helmholtz-Platz 1 Eggenstein-Leopoldshafen 76344 Germany [i]AG Experimentelle Plasmaphysik Universitt Augsburg Augsburg 86135 Germany [j]EUROfusion Consortium Boltzmannstr. 2 Garching 85748 Germany [k]LPP-ERM/KMS Laboratory for Plasma Physics Royal Military Academy TEC Partner Renaissancelaan 30 Brussels 1000 Belgium [l]Politecnico di Torino Corso Duca degli Abruzzi 24 Torino 10129 Italy [m]National Technical University of Athens School of Electrical and Computer Engineering Zografou Athens GR-157 71 Greece [n]Max Planck Institute for Plasma Physics Wendelsteinstrasse 1 Greifswald 17491 Germany

The European dEMO is a pulsed device with pulse length of 2 hours. The functions devoted to the heating and current drive system are: plasma breakdown, plasma ramp-up to the flat-top where fusion reactions occur, the control of the plasma during the flat-top phase, and finally the plasma ramp-down. The EU-dEMO project was in a Pre-Concept design Phase during 2014-2020, meaning that in some cases, the design values of the device and the precise requirements from the physics point of view were not yet frozen. A total of 130 MW was considered for the all phases of the plasma: in the flat top, 30 MW is required for neoclassical tearing modes (NTM) control, 30 MW for burn control, and 70 MW for the control of thermal instability (TI), without any specific functions requested from each system, Electron Cyclotron (EC), Ion Cyclotron (IC), or Neutral Beam (NB) Injection. At the beginning of 2020, a strategic decision was taken, to consider EC as the baseline for the next phase (in 2021 and beyond). R&d on IC and NB will be risk mitigation measures. In parallel with progresses in Physics modelling, a decision point on the heating strategy will be taken by 2024. This paper describes the status of the R&d development during the period 2014-2020. It assumes that the 3 systems EC, IC and NB will be needed. For integration studies, they are assumed to be implemented at a power level of at least 50 MW. This paper describes in detail the status reached by the EC, IC and NB at the end of 2020. It will be used in the future for further development of the baseline heating method EC, and serves as starting point to further develop IC and NB in areas needed for these systems to be considered for dEMO.

关键词： Heating Current drive Electron Cyclotron Ion Cyclotron Neutral Beam dEMO

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data availability and requirements relevant for the Ariel space mission and other exoplanet atmosphere applications

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RAS Techniques and Instruments 2024年第1期3卷 636-690页

作者： Chubb, Katy l Robert, Severine Sousa-Silva, Clara Yurchenko, Sergei N Allard, Nicole F Boudon, Vincent Buldyreva, Jeanna Bultel, Benjamin Coustenis, Athena Foltynowicz, Aleksandra Gordon, Iouli E Hargreaves, Robert J Helling, Christiane Hill, Christian Hrodmarsson, Helgi Rafn Karman, Tijs lecoq-Molinos, Helena Migliorini, Alessandra Rey, Michaël Richard, Cyril Sadiek, Ibrahim Schmidt, Frederic Sokolov, Andrei Stefani, Stefania Tennyson, Jonathan Venot, Olivia Wright, Sam O. M Arenales-lope, Rosa Barstow, Joanna K Bocchieri, Andrea Carrasco, Nathalie dubey, dwaipayan Egorov, Oleg Muñoz, Antonio García Gharib-Nezhad, Ehsan Gkouvelis, leonardos Grübel, Fabian Irwin, Patrick Gerard Joseph Knížek, Antonín lewis, david A lodge, Matt G Ma, Sushuang Martins, Zita Molaverdikhani, Karan Morello, Giuseppe Nikitin, Andrei Panek, Emilie Rengel, Miriam Rinaldi, Giovanna Skinner, Jack W Tinetti, Giovanna Van Kempen, Tim A Yang, Jingxuan Zingales, Tiziano HH Wills Physics Laboratory School of Physics University of Bristol Tyndall Avenue Bristol BS8 1TL United Kingdom Centre for Exoplanet Science University of St Andrews North Haugh St Andrews KY16 9SS United Kingdom Royal Belgian Institute for Space Aeronomy (BIRA-IASB) Av. Circulaire 3 Uccle B-1180 Belgium Bard College Institute of Astrophysics and Space Sciences 30 Campus Rd Annandale-On-Hudson 12504 NY United States Institute of Astrophysics and Space Sciences Rua das Estrelas Porto P-4150-762 Portugal Department of Physics and Astronomy University College London London WC1E 6BT United Kingdom Observatoire de Paris PSL Research University 61 Avenue de l'Observatoire Paris F-75014 France Lab. ICB UMR 6303 CNRS / Universite de Bourgogne 9 Av. A. Savary BP 47870 Cedex Dijon F-21078 France Institut UTINAM UMR CNRS 6213 Universite de Franche-Comte 16 Route de Gray Cedex Besançon F-25030 France GEOPS Universite Paris-Saclay CNRS Orsay F-91405 France LESIA Paris Observatory CNRS PSL Univ. 5 place Jules Janssen Cedex Meudon F-92190 France Department of Physics Umeå University Umeå SE-901 87 Sweden Center for Astrophysics | Harvard & Smithsonian 60 Garden Street Cambridge 02138 MA United States Space Research Institute Austrian Academy of Sciences Schmiedlstrasse 6 Graz A-8042 Austria TU Graz Fakultät für Mathematik Physik und Geodäsie Petersgasse 16 Graz A-8010 Austria Atomic and Molecular Data Unit International Atomic Energy Agency Wagramer Strasse 5 Vienna A-1400 Austria Universite Paris Cite and Univ Paris Est Creteil CNRS LISA Paris F-75013 France Institute for Molecules and Materials Radboud University Heyendaalseweg 135 Nijmegen NL-6525 AJ Netherlands Institute of Astronomy KU Leuven Celestijnenlaan 200D bus 2401 Leuven B-3001 Belgium IAPS-INAF Via Fosso del Cavaliere 100 Rome 00133 Italy Universite de Reims Champagne-Ardenne UMR CNRS 7331 BP 1039 Cedex 2 Reims F-51687 France Leibniz Institute for Plasma S

The goal of this white paper is to provide a snapshot of the data availability and data needs primarily for the Ariel space mission, but also for related atmospheric studies of exoplanets and cool stars. It covers the following data-related topics: molecular and atomic line lists, line profiles, computed cross-sections and opacities, collision-induced absorption and other continuum data, optical properties of aerosols and surfaces, atmospheric chemistry, UV photodissociation and photoabsorption cross-sections, and standards in the description and format of such data. These data aspects are discussed by addressing the following questions for each topic, based on the experience of the 'data-provider' and 'data-user' communities: (1) what are the types and sources of currently available data, (2) what work is currently in progress, and (3) what are the current and anticipated data needs. We present a GitHub platform for Ariel-related data, with the goal to provide a go-to place for both data-users and data-providers, for the users to make requests for their data needs and for the data-providers to link to their available data. Our aim throughout the paper is to provide practical information on existing sources of data whether in data bases, theoretical, or literature sources. © 2024 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society.

关键词： Algorithms Ariel data Methods data needs Numerical methods

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First Search for Axion-like Particles in a Storage Ring Using a Polarized deuteron Beam

arXiv

引用

arXiv 2022年

作者： Karanth, S. Stephenson, E.J. Chang, S.P. Hejny, V. Pretz, J. Semertzidis, Y.K. Wirzba, A. Wrońska, A. Abusaif, F. Aksentev, A. Alberdi, B. Aggarwal, A. Andres, A. Barion, l. Bekman, I. Beyß, M. Böhme, C. Breitkreutz, B. von Byern, C. Canale, N. Ciullo, G. dymov, S. Fröhlich, N.-O. Gebel, R. Grigoryev, K. Grzonka, d. Hetzel, J. Javakhishvili, O. Jeong, H. Kacharava, A. Kamerdzhiev, V. Keshelashvili, I. Kononov, A. laihem, K. lehrach, A. lenisa, P. lomidze, N. lorentz, B. Magiera, A. McHedlishvili, d. Müller, F. Nass, A. Nikolaev, N.N. Park, S. Pesce, A. Poncza, V. Prasuhn, d. Rathmann, F. Siddique, S. Saleev, A. Shurkhno, N. Shergelashvili, d. Shmakova, V. Slim, J. Soltner, H. Stassen, R. Ströher, H. Tabidze, M. Tagliente, G. Valdau, Y. Vitz, M. Wagner, T. Wüstner, P. JEdI Collaboration Marian Smoluchowski Institute of Physics Jagiellonian University Cracow30348 Poland Indiana University Department of Physics BloomingtonIN47405 United States Department of Physics KAIST Daejon34141 Korea Republic of Center for Axion and Precision Physics Research IBS Daejon34051 Korea Republic of Institut für Kernphysik Forschungszentrum Jülich Jülich52425 Germany III. Physikalisches Institut B RWTH Aachen University Aachen52056 Germany Forschungszentrum Jülich and RWTH Aachen University Germany Institute for Advanced Simulation Forschungszentrum Jülich Jülich52425 Germany Institute for Nuclear Research Russian Academy of Sciences Moscow117312 Russia University of Ferrara Istituto Nazionale di Fisica Nucleare Ferrara44100 Italy GSI Helmholtzzentrum für Schwerionenforschung Darmstadt64291 Germany Department of Electrical and Computer Engineering Agricultural University of Georgia Tbilisi0159 Georgia Department of Physics Korea University Seoul02841 Korea Republic of High Energy Physics Institute Tbilisi State University Tbilisi0186 Georgia L.D. Landau Institute for Theoretical Physics Chernogolovka142432 Russia Moscow Institute of Physics and Technology School of Physics Moscow region Dolgoprudny141707 Russia Zentralinstitut für Engineering Elektronik und Analytik Forschungszentrum Jülich Jülich52425 Germany Istituto Nazionale di Fisica Nucleare sez. Bari Bari70125 Italy

Based on the notion that the local dark-matter field of axions or axion-like particles (AlPs) in our Galaxy induces oscillating couplings to the spins of nucleons and nuclei (via the electric dipole moment of the latter and/or the paramagnetic axion-wind effect), we establish the feasibility of a new method to search for AlPs in storage rings. Based on previous work that allows us to maintain the in-plane polarization of a stored deuteron beam for a few hundred seconds, we performed a first proof-of-principle experiment at the Cooler Synchrotron COSY to scan momenta near 970 MeV/c. This entailed a scan of the spin precession frequency. At resonance between the spin precession frequency of deuterons and the AlP-induced EdM oscillation frequency there will be an accumulation of the polarization component out of the ring plane. Since the axion frequency is unknown, the momentum of the beam and consequently the spin precession frequency were ramped to search for a vertical polarization change that would occur when the resonance is crossed. At COSY, four beam bunches with different polarization directions were used to make sure that no resonance was missed because of the unknown relative phase between the polarization precession and the axion/AlP field. A frequency window of 1.5–kHz width around the spin precession frequency of 121 kHz was scanned. We describe the experimental procedure and a test of the methodology with the help of a radiofrequency Wien filter located on the COSY ring. No AlP resonance was observed. As a consequence an upper limit of the oscillating EdM component of the deuteron as well as its axion coupling constants are provided. © 2022, CC BY.

关键词： Storage rings

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