Physics Procedia最新文献_第9页

Neutron Imager with Micro Channel Plates (MCP) in Electrostatic Mirror Configuration: First Experimental Test 带微通道板(MCP)的中子成像仪静电镜结构:第一次实验测试

Physics Procedia Pub Date : 2017-01-01 Epub Date: 2017-10-26 DOI: 10.1016/j.phpro.2017.09.020

V. Variale , B. Skarbo

引用次数: 1

Physics in “Real Life”: Accelerator-based Research with Undergraduates “现实生活”中的物理学:大学生基于加速器的研究☆

Physics Procedia Pub Date : 2017-01-01 Epub Date: 2017-10-26 DOI: 10.1016/j.phpro.2017.09.025

J.L. Klay

引用次数: 0

Pulsed Neutron Imaging for Non-destructive Testing using Simulated Nuclear Fuel Samples 用模拟核燃料样品进行无损检测的脉冲中子成像

Physics Procedia Pub Date : 2017-01-01 Epub Date: 2017-06-24 DOI: 10.1016/j.phpro.2017.06.011

Daisuke Ito , Tadafumi Sano , Jun-ichi Hori , Yoshiyuki Takahashi , Hiroyuki Hasemi , Takashi Kamiyama , Ken Nakajima

{"title":"Pulsed Neutron Imaging for Non-destructive Testing using Simulated Nuclear Fuel Samples","authors":"Daisuke Ito , Tadafumi Sano , Jun-ichi Hori , Yoshiyuki Takahashi , Hiroyuki Hasemi , Takashi Kamiyama , Ken Nakajima","doi":"10.1016/j.phpro.2017.06.011","DOIUrl":"10.1016/j.phpro.2017.06.011","url":null,"abstract":"<div><p>An integrated assessment method for a nuclear fuel with high decay heat and high radioactivity is required to establish fast reactor system with Trans-Uranium (TRU) fuel containing minor actinides. In addition, a Pu quantitation method with rapidity and accuracy is also necessary in a viewpoint of nuclear security. For these demands, a quantitative evaluation technique for nuclei concentration, thermal property and physical information of such fuel has to be developed. The present study focuses on the non-destructive imaging using pulsed neutrons. Experiments are carried out at Hokkaido University Neutron Source (HUNS) and a gas electron multiplier (GEM) is applied to obtain 2-D information of time-of-flight (TOF). To simulate a nuclear fuel pellet, a sample with equivalent thermal neutron cross-section to the enriched uranium fuel is prepared and the transmitted images of the simulated sample are acquired. Furthermore, a small piece of In, which simulates the Pu spot in the actual fuel, is inserted into the sample and the detectability of the small spot is discussed.</p></div>","PeriodicalId":20407,"journal":{"name":"Physics Procedia","volume":"88 ","pages":"Pages 89-94"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.phpro.2017.06.011","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89393863","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}

引用次数: 1

Geant4 Modifications for Accurate Fission Simulations 精确裂变模拟的Geant4修正

Physics Procedia Pub Date : 2017-01-01 Epub Date: 2017-10-26 DOI: 10.1016/j.phpro.2017.09.005

Jiawei Tan, Joseph Bendahan

{"title":"Geant4 Modifications for Accurate Fission Simulations","authors":"Jiawei Tan, Joseph Bendahan","doi":"10.1016/j.phpro.2017.09.005","DOIUrl":"10.1016/j.phpro.2017.09.005","url":null,"abstract":"<div><p>Monte Carlo is one of the methods to simulate the generation and transport of radiation through matter. The most widely used radiation simulation codes are MCNP and Geant4. The simulation of fission production and transport by MCNP has been thoroughly benchmarked. There is an increasing number of users that prefer using Geant4 due to the flexibility of adding features. However, it has been found that Geant4 does not have the proper fission-production cross sections and does not produce the correct fission products. To achieve accurate results for studies in fissionable material applications, Geant4 was modified to correct these inaccuracies and to add new capabilities. The fission model developed by the Lawrence Livermore National Laboratory was integrated into the neutron-fission modeling package. The photofission simulation capability was enabled using the same neutron-fission library under the assumption that nuclei fission in the same way, independent of the excitation source. The modified fission code provides the correct multiplicity of prompt neutrons and gamma rays, and produces delayed gamma rays and neutrons with time and energy dependencies that are consistent with ENDF/B-VII. The delayed neutrons are now directly produced by a custom package that bypasses the fragment cascade model. The modifications were made for U-235, U-238 and Pu-239 isotopes; however, the new framework allows adding new isotopes easily. The SLAC nuclear data library is used for simulation of isotopes with an atomic number above 92 because it is not available in Geant4. Results of the modified Geant4.10.1 package of neutron-fission and photofission for prompt and delayed radiation are compared with ENDFB-VII and with results produced with the original package.</p></div>","PeriodicalId":20407,"journal":{"name":"Physics Procedia","volume":"90 ","pages":"Pages 256-265"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.phpro.2017.09.005","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83816290","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}

引用次数: 2

Exploring Hominin and Non-hominin Primate Dental Fossil Remains with Neutron Microtomography 用中子微层析成像技术探索古人类和非古人类灵长类动物牙齿化石

Physics Procedia Pub Date : 2017-01-01 Epub Date: 2017-06-24 DOI: 10.1016/j.phpro.2017.06.014

Clément Zanolli , Burkhard Schillinger , Amélie Beaudet , Ottmar Kullmer , Roberto Macchiarelli , Lucia Mancini , Friedemann Schrenk , Claudio Tuniz , Vladimira Vodopivec

引用次数: 13

Considerations on the construction of a Powder Bed Fusion platform for Additive Manufacturing 构建增材制造粉末床融合平台的思考

Physics Procedia Pub Date : 2017-01-01 Epub Date: 2017-09-26 DOI: 10.1016/j.phpro.2017.08.004

Sebastian Aagaard Andersen, Karl-Emil Nielsen, David Bue Pedersen, Jakob Skov Nielsen

{"title":"Considerations on the construction of a Powder Bed Fusion platform for Additive Manufacturing","authors":"Sebastian Aagaard Andersen, Karl-Emil Nielsen, David Bue Pedersen, Jakob Skov Nielsen","doi":"10.1016/j.phpro.2017.08.004","DOIUrl":"10.1016/j.phpro.2017.08.004","url":null,"abstract":"<div><p>As the demand for moulds and other tools becomes increasingly specific and complex, an additive manufacturing approach to production is making its way to the industry through laser based consolidation of metal powder particles by a method known as powder bed fusion. This paper concerns a variety of design choices facilitating the development of an experimental powder bed fusion machine tool, capable of manufacturing metal parts with strength matching that of conventional manufactured parts and a complexity surpassing that of subtractive processes. To understand the different mechanisms acting within such an experimental machine tool, a fully open and customizable rig is constructed. Emphasizing modularity in the rig, allows alternation of lasers, scanner systems, optical elements, powder deposition, layer height, temperature, atmosphere, and powder type. Through a custom-made software platform, control of the process is achieved, which extends into a graphical user interface, easing adjustment of process parameters and the job file generation.</p></div>","PeriodicalId":20407,"journal":{"name":"Physics Procedia","volume":"89 ","pages":"Pages 3-10"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.phpro.2017.08.004","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88650872","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}

引用次数: 2

High-Statistics β+/EC-Decay Study of 122Xe 122xe的高统计β + / ec衰变研究

Physics Procedia Pub Date : 2017-01-01 Epub Date: 2017-10-26 DOI: 10.1016/j.phpro.2017.09.047

B. Jigmeddorj , P.E. Garrett , C.A. Andreoiu , G.C. Ball , T. Bruhn , D.S. Cross , A.B. Garnsworthy , B. Hadinia , M. Moukaddam , J. Park , J.L. Pore , A.J. Radich , M.M. Rajabali , E.T. Rand , U. Rizwan , C.E. Svensson , P. Voss , Z. Wang , J.L. Wood , S.W. Yates

引用次数: 1

Modeling Optical Low-threshold Exciton Nonlinearity in Dielectric Nanocomposites 介质纳米复合材料中光学低阈值激子非线性的建模

Physics Procedia Pub Date : 2017-01-01 Epub Date: 2017-02-20 DOI: 10.1016/j.phpro.2017.01.010

D.V. Storozhenko , V.P. Dzyuba , Y.N. Kulchin , A.V. Amosov

引用次数: 1

Which Resolution can be Achieved in Practice in Neutron Imaging Experiments? – A General View and Application on the Zr - ZrH2 and ZrO2 - ZrN Systems 中子成像实验在实际中可达到何种分辨率?- Zr - ZrH 2和ZrO 2 - ZrN体系的概论与应用

Physics Procedia Pub Date : 2017-01-01 Epub Date: 2017-06-24 DOI: 10.1016/j.phpro.2017.06.037

Mirco Grosse , Nikolay Kardjilov

引用次数: 6

Hybrid Laser-Arc Welding of the High-Strength Shipbuilding Steels: Equipment and Technology 高强度船舶钢的激光电弧复合焊接:设备与技术☆

Physics Procedia Pub Date : 2017-01-01 Epub Date: 2017-09-26 DOI: 10.1016/j.phpro.2017.08.005

G. Turichin , M. Kuznetsov , I. Tsibulskiy , A. Firsova

{"title":"Hybrid Laser-Arc Welding of the High-Strength Shipbuilding Steels: Equipment and Technology","authors":"G. Turichin , M. Kuznetsov , I. Tsibulskiy , A. Firsova","doi":"10.1016/j.phpro.2017.08.005","DOIUrl":"10.1016/j.phpro.2017.08.005","url":null,"abstract":"<div><p>Hybrid laser-arc welding (HLAW) allows getting weld joints with thickness up to 35mm for one pass, provide good quality formation of joints, minimal thermal deformations, the productivity in 10 times more in comparison with arc welding. In addition, replacement arc welding to the HLAW allows economizing filler materials, shielding gas and consumable electricity more than 4 times. Therefore, HLAW is actually technology for basic engineering branches and especially for shipbuilding. The Institute of Laser and Welding Technologies (ILWT) developed laser and hybrid laser-arc welding technologies for different type of steels and alloys including high-strength shipbuilding steels. Also ILWT produced portal and robotic systems for HLAW process realization. Portal system for hybrid laser-arc welding of panels with dimensions 6x6 m using at the manufacturing of flat curvilinear sections in the shipbuilding is depicted in the article. Results of experimental researches of the hybrid laser-arc welding parameters influence on the formation and mechanical properties of weld joint are described at the publication also. Experimental part was made with using of the portal system.</p></div>","PeriodicalId":20407,"journal":{"name":"Physics Procedia","volume":"89 ","pages":"Pages 156-163"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.phpro.2017.08.005","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85540104","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}

引用次数: 40