Physics Procedia最新文献

{"title":"Illinois Accelerator Research Center","authors":"Thomas K. Kroc,&nbsp;Charlie A. Cooper","doi":"10.1016/j.phpro.2017.09.030","DOIUrl":"10.1016/j.phpro.2017.09.030","url":null,"abstract":"<div><p>The Illinois Accelerator Research Center (IARC) hosts a new accelerator development program at Fermi National Accelerator Laboratory. IARC provides access to Fermi's state-of-the-art facilities and technologies for research, development and industrialization of particle accelerator technology. In addition to facilitating access to available existing Fermi infrastructure, the IARC Campus has a dedicated 36,000 ft² Heavy Assembly Building (HAB) with all the infrastructure needed to develop, commission and operate new accelerators. Connected to the HAB is a 47,000 ft² Office, Technology and Engineering (OTE) building, paid for by the state, that has office, meeting, and light technical space. The OTE building, which contains the Accelerator Physics Center, and nearby Accelerator and Technical divisions provide IARC collaborators with unique access to world class expertise in a wide array of accelerator technologies. At IARC scientists and engineers from Fermilab and academia work side by side with industrial partners to develop breakthroughs in accelerator science and translate them into applications for the nation's health, wealth and security.</p></div>","PeriodicalId":20407,"journal":{"name":"Physics Procedia","volume":"90 ","pages":"Pages 92-99"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.phpro.2017.09.030","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79610756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Features of Optical Breakdown of Liquid under the Action of Ultrasound","authors":"A.V. Bulanov ,&nbsp;I.G. Nagorny ,&nbsp;A.V. Storozhenko","doi":"10.1016/j.phpro.2017.01.005","DOIUrl":"10.1016/j.phpro.2017.01.005","url":null,"abstract":"<div><p>The experimental results show the sharply strengthened effects of acoustic emission from a breakdown zone by the joint influence of laser and ultrasonic irradiation. Various breakdown thresholds and character of acoustic emission in fresh and sea water are observed. The experimental result established that acoustic emission from optical breakdown of sea water in the presence and absence of ultrasound exceeds acoustic emission for the same experimental conditions in fresh water.</p></div>","PeriodicalId":20407,"journal":{"name":"Physics Procedia","volume":"86 ","pages":"Pages 141-146"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.phpro.2017.01.005","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75877522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Theoretical Model of Controllable Waveguide Channels System Holographic Formation in Photopolymer-liquid Crystalline Composition","authors":"A.O. Semkin,&nbsp;S.N. Sharangovich","doi":"10.1016/j.phpro.2017.01.020","DOIUrl":"10.1016/j.phpro.2017.01.020","url":null,"abstract":"<div><p>In this work the theoretical model of holographic formation of controllable waveguide channels system in photopolymer-liquid crystalline composition is developed. The ability to control the light propagation conditions in waveguides by external electric field impact is demonstrated.</p></div>","PeriodicalId":20407,"journal":{"name":"Physics Procedia","volume":"86 ","pages":"Pages 181-186"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.phpro.2017.01.020","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81532959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Comparative Study of the Crystallite Size and the Dislocation Density of Bent Steel Plates using Bragg-edge Transmission Imaging, TOF Neutron Diffraction and EBSD","authors":"K. Oikawa ,&nbsp;Y.H. Su ,&nbsp;Y. Tomota ,&nbsp;T. Kawasaki ,&nbsp;T. Shinohara ,&nbsp;T. Kai ,&nbsp;K. Hiroi ,&nbsp;S.Y. Zhang ,&nbsp;J.D. Parker ,&nbsp;H. Sato ,&nbsp;Y. Kiyanagi","doi":"10.1016/j.phpro.2017.06.004","DOIUrl":"10.1016/j.phpro.2017.06.004","url":null,"abstract":"<div><p>Line broadening analysis was performed on the time-of-flight neutron diffraction data for the plastically bent plates of a ferritic steel and a duplex stainless steel. A Rietveld analysis program, Z-Rietveld ver. 1.0 was used to fit the anisotropically broadened patterns where the increase in Lorentzian full width at half maximum (FWHM) and the Gaussian FWHM involves information of the crystallite size and the dislocation density, respectively. The derived results were compared with those obtained by using Bragg-edge transmission spectrum analysis and electron backscatter diffraction (EBSD) observations.</p></div>","PeriodicalId":20407,"journal":{"name":"Physics Procedia","volume":"88 ","pages":"Pages 34-41"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.phpro.2017.06.004","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72787376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Inline Repair of Blowouts During Laser Welding","authors":"K.S. Hansen ,&nbsp;F.O. Olsen ,&nbsp;M. Kristiansen ,&nbsp;O. Madsen","doi":"10.1016/j.phpro.2017.08.022","DOIUrl":"10.1016/j.phpro.2017.08.022","url":null,"abstract":"<div><p>In a current laser welding production process of components of stainless steel, a butt joint configuration may lead to failures in the form of blowouts, causing an unacceptable welding quality. A study to improve the laser welding process was performed with the aim of solving the problem by designing a suitable pattern of multiple small laser spots rather than a single spot in the process zone.</p><p>The blowouts in the process are provoked by introducing small amounts of zinc powder in the butt joint. When the laser heats up the zinc, this rapidly evaporates and expands, leaving the melt pool to be blown away locally. Multiple spot pattern designs are tested. Spot patterns are produced by applying diffractive optics to a beam from a single mode fiber laser.</p><p>Results from welding while applying spot patterns both with and without trailing spots are presented. Data showing the power ratio between a trailing spot and two main spots as a function of spot distance is also presented.</p><p>The results of the study show that applying multiple spots in the welding process may improve the process stability when welding materials with small impurities in the form of zinc particles.</p></div>","PeriodicalId":20407,"journal":{"name":"Physics Procedia","volume":"89 ","pages":"Pages 58-69"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.phpro.2017.08.022","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78143859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Signal Chain - how the Removal of an Image Intensifier at the AERE Reactor in Bangladesh Improves Neutron Imaging","authors":"Burkhard Schillinger ,&nbsp;Sudipta Saha","doi":"10.1016/j.phpro.2017.06.034","DOIUrl":"10.1016/j.phpro.2017.06.034","url":null,"abstract":"<div><p>Most neutron imaging systems use a neutron sensitive scintillation screen and camera. Due to the highly exothermic nature of the detection reaction, many thousand photons are produced for one detected neutron. If an additional image intensifier is used, the signal generated by very few neutrons may saturate the camera without delivering sufficient neutron statistics to examine a neutron radiography sample. This article takes a look at the signal chain for neutron radiography and tries to give some help for estimating required statistics and exposure times.</p></div>","PeriodicalId":20407,"journal":{"name":"Physics Procedia","volume":"88 ","pages":"Pages 243-249"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.phpro.2017.06.034","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82225484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Detection System of the First Rapidly Relocatable Tagged Neutron Inspection System (RRTNIS), Developed in the Framework of the European H2020 C-BORD Project","authors":"Cristiano Lino Fontana ,&nbsp;Alberto Carnera ,&nbsp;Marcello Lunardon ,&nbsp;Felix Pino ,&nbsp;Cinzia Sada ,&nbsp;Francesca Soramel ,&nbsp;Luca Stevanato ,&nbsp;Giancarlo Nebbia ,&nbsp;Cédric Carasco ,&nbsp;Bertrand Perot ,&nbsp;Alix Sardet ,&nbsp;Guillaume Sannie ,&nbsp;Alessandro Iovene ,&nbsp;Carlo Tintori ,&nbsp;Krystian Grodzicki ,&nbsp;Marek Moszyński ,&nbsp;Paweł Sibczyński ,&nbsp;Lukasz Swiderski ,&nbsp;Sandra Moretto","doi":"10.1016/j.phpro.2017.09.010","DOIUrl":"10.1016/j.phpro.2017.09.010","url":null,"abstract":"<div><p>The European project entitled “effective Container inspection at BORDer control points” (C-BORD) focuses on the development and <em>in-situ</em> tests of a comprehensive cost-effective solution for the generalized Non-Intrusive Inspection (NII) of containers and large-volume freight at the European Union (EU) border. It copes with a large range of targets, including explosives, chemical warfare agents, illicit drugs, tobacco and Special Nuclear Materials. Within the C-BORD project, a new generation of Tagged Neutron Inspection System (TNIS) for cargo containers is foreseen. Unlike its predecessors, this system would be the first Rapidly Relocatable TNIS (RRTNIS). It will be a second-line defense system, to be used on sealed containers in order to detect explosives, illicit drugs and chemical agents in a suspect voxel (elementary volume unit).</p><p>We report on the status of the RRTNIS system, in particular the overall design, the characterization of the large-volume NaI(Tl) gamma detectors, the digital analysis of the time measurements and the Data Acquisition System (DAQ).</p></div>","PeriodicalId":20407,"journal":{"name":"Physics Procedia","volume":"90 ","pages":"Pages 279-284"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.phpro.2017.09.010","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77954457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Influence of Shielding Gas Configurations on Formability of the Ferritic Stainless Steel Laser Weld","authors":"Markku Keskitalo,&nbsp;Mikko Hietala,&nbsp;Kari Mäntyjärvi","doi":"10.1016/j.phpro.2017.08.008","DOIUrl":"10.1016/j.phpro.2017.08.008","url":null,"abstract":"<div><p>According to previous studies the careful argon shielding of the weld is very important in order to achieve a ductile and formable laser weld of Ti-stabilized ferritic stainless steel. In practice it is often difficult to use the root gas shielding of the laser weld. The aim of this study was to determine the sufficient practise of gas shielding in order to achieve the ductile laser weld. According to Erichsen formability results the shielding gas nozzle in the post weld side must be used in order to reach the good formability of the laser weld. The single shielding gas pipe before the weld is not a sufficient method for the gas shielding. There is no need to use root gas in order to achieve a ductile weld. The single shielding gas pipe before the weld can cause a uptake blast in the key hole and further oxidize the weld metal.</p></div>","PeriodicalId":20407,"journal":{"name":"Physics Procedia","volume":"89 ","pages":"Pages 80-88"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.phpro.2017.08.008","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73994839","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Status of the Imaging Facility INUS at INR","authors":"Marin Dinca,&nbsp;C. Iorgulis,&nbsp;D. Barbos,&nbsp;L.D. Mitrea","doi":"10.1016/j.phpro.2017.06.023","DOIUrl":"10.1016/j.phpro.2017.06.023","url":null,"abstract":"<div><p>An imaging facility (INUS) with thermal neutrons and γ radiations is in use at the tangential channel of the TRIGA Annular Core Pulsing Reactor (ACPR) from the Institute for Nuclear Research (INR). ACPR is a nuclear research reactor operated in steady state with a maximum power of 500<!--> <!-->kW and in pulsing mode with a peak power of 20000 MW. ACPR was used for neutron imaging only by operation in steady state mode at a power of 100<!--> <!-->kW. There are presented actual parameters of the facility after some beam port's and collimator's modifications, the last improvements in the remote control for different displacements with step by step motors to perform easier and faster experiments, the benefit of the using new lens, Xenon 0.95/25<!--> <!-->mm, with low f-number (the ratio of the lens’ focal length (f) to the diameter of the aperture or iris diameter, written as f/#), that gathers more light than previously lens and the experiments for visualization of the first dynamic scenes with EM-CCD Hamamatsu C9100-02 camera. The experiments were made for static positions and movements of a pendulum with different contrast elements for thermal neutrons (captured by a ⁶Li-ZnS scintillator) and γ radiations (captured by a Lanex scintillator), with and without mono-crystal of bismuth filter in radiation beam. The effect of the bismuth filter at the formation of the image with each of the two scintillators is assessed. It is established the integration time on sensor to have the best images for static projections and minimum integration time on sensor for qualitatively analyzable images on monitor for real time imaging. Hamamatsu camera can be used now to acquire a sequence of more images with higher quality for tomography reconstructions in a given time as a consequence of the using of the new lens (because till now was not enough the maximum 10 s integration time on sensor for qualitative images) and of the control-command system with the new stepper motors that shortens the time to increment the position of the investigated object.</p></div>","PeriodicalId":20407,"journal":{"name":"Physics Procedia","volume":"88 ","pages":"Pages 167-174"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.phpro.2017.06.023","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77552671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electromagnetic Modeling of Human Body Using High Performance Computing","authors":"Cho-Kuen Ng ,&nbsp;Mark Beall ,&nbsp;Lixin Ge ,&nbsp;Sanghoek Kim ,&nbsp;Ottmar Klaas ,&nbsp;Ada Poon","doi":"10.1016/j.phpro.2017.09.033","DOIUrl":"10.1016/j.phpro.2017.09.033","url":null,"abstract":"<div><p>Realistic simulation of electromagnetic wave propagation in the actual human body can expedite the investigation of the phenomenon of harvesting implanted devices using wireless powering coupled from external sources. The parallel electromagnetics code suite ACE3P developed at SLAC National Accelerator Laboratory is based on the finite element method for high fidelity accelerator simulation, which can be enhanced to model electromagnetic wave propagation in the human body. Starting with a CAD model of a human phantom that is characterized by a number of tissues, a finite element mesh representing the complex geometries of the individual tissues is built for simulation. Employing an optimal power source with a specific pattern of field distribution, the propagation and focusing of electromagnetic waves in the phantom has been demonstrated. Substantial speedup of the simulation is achieved by using multiple compute cores on supercomputers.</p></div>","PeriodicalId":20407,"journal":{"name":"Physics Procedia","volume":"90 ","pages":"Pages 107-114"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.phpro.2017.09.033","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87355046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}