Physics Procedia最新文献_第6页

Polychromatic Two-wave Mixing in a Cubic Photorefractive Crystal 立方光折变晶体中的多色双波混频

Physics Procedia Pub Date : 2017-01-01 DOI: 10.1016/j.phpro.2017.01.009

R.V. Romashko , M.A. Asalkhanova , Yu.N. Kulchin

引用次数: 1

A Neutron Detector with Submicron Spatial Resolution using Fine-grained Nuclear Emulsion 亚微米空间分辨率的细粒核乳剂中子探测器

Physics Procedia Pub Date : 2017-01-01 DOI: 10.1016/j.phpro.2017.06.031

N. Naganawa , S. Awano , M. Hino , M. Hirose , K. Hirota , H. Kawahara , M. Kitaguchi , K. Mishima , T. Nagae , H.M. Shimizu , S. Tasaki , A. Umemoto

引用次数: 6

Status and Perspectives of Neutron Imaging Facilities 中子成像设备的现状与展望

Physics Procedia Pub Date : 2017-01-01 DOI: 10.1016/j.phpro.2017.06.019

E. Lehmann , P. Trtik , D. Ridikas

{"title":"Status and Perspectives of Neutron Imaging Facilities","authors":"E. Lehmann , P. Trtik , D. Ridikas","doi":"10.1016/j.phpro.2017.06.019","DOIUrl":"10.1016/j.phpro.2017.06.019","url":null,"abstract":"<div><p>The methodology and the application range of neutron imaging techniques have been significantly improved at numerous facilities worldwide in the last decades. This progress has been achieved by new detector systems, the setup of dedicated, optimized and flexible beam lines and the much better understanding of the complete imaging process thanks to complementary simulations. Furthermore, new applications and research topics were found and implemented.</p><p>However, since the quality and the number of neutron imaging facilities depend much on the access to suitable beam ports, there is still an enormous potential to implement state-of-the-art neutron imaging techniques at many more facilities. On the one hand, there are prominent and powerful sources which do not intend/accept the implementation of neutron imaging techniques due to the priorities set for neutron scattering and irradiation techniques exclusively. On the other hand, there are modern and useful devices which remain under-utilized and have either not the capacity or not the know-how to develop attractive user programs and/or industrial partnerships. In this overview of the international status of neutron imaging facilities, we will specify details about the current situation.</p></div>","PeriodicalId":20407,"journal":{"name":"Physics Procedia","volume":"88 ","pages":"Pages 140-147"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.phpro.2017.06.019","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73893280","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: 14

Thermo- and Mechanically Stable Electro-optic Q-switches Based on the RKTP Crystal 基于RKTP晶体的热稳定和机械稳定电光q开关

Physics Procedia Pub Date : 2017-01-01 DOI: 10.1016/j.phpro.2017.01.014

O.T. Vazhinsky , K.S. Vazhinskaya , I.A. Pargachev , L.Y. Serebrennikov , V.A. Krakovsky

引用次数: 1

Optical Formation of Waveguide Elements in Photorefractive Surface Layer of a Lithium Niobate Sample 铌酸锂样品光折变表面层波导元件的光学形成

Physics Procedia Pub Date : 2017-01-01 DOI: 10.1016/j.phpro.2017.01.013

A.D. Bezpaly, V.M. Shandarov

引用次数: 5

Verification of Plutonium Content in PuBe Sources Using MCNP® 6.2.0 Beta with TENDL 2012 Libraries 使用MCNP®6.2.0 Beta与TENDL 2012库验证PuBe源中的钚含量

Physics Procedia Pub Date : 2017-01-01 DOI: 10.1016/j.phpro.2017.09.016

M.L. Lockhart, G.E. McMath

{"title":"Verification of Plutonium Content in PuBe Sources Using MCNP® 6.2.0 Beta with TENDL 2012 Libraries","authors":"M.L. Lockhart, G.E. McMath","doi":"10.1016/j.phpro.2017.09.016","DOIUrl":"10.1016/j.phpro.2017.09.016","url":null,"abstract":"<div><p>Although the production of PuBe neutron sources has discontinued, hundreds of sources with unknown or inaccurately declared plutonium content are in existence around the world. Institutions have undertaken the task of assaying these sources, measuring, and calculating the isotopic composition, plutonium content, and neutron yield. The nominal plutonium content, based off the neutron yield per gram of pure <sup>239</sup>Pu, has shown to be highly inaccurate. New methods of measuring the plutonium content allow a more accurate estimate of the true Pu content, but these measurements need verification. Using the TENDL 2012 nuclear data libraries, MCNP6 has the capability to simulate the (α, n) interactions in a PuBe source. Theoretically, if the source is modeled according to the plutonium content, isotopic composition, and other source characteristics, the calculated neutron yield in MCNP can be compared to the experimental yield, offering an indication of the accuracy of the declared plutonium content. In this study, three sets of PuBe sources from various backgrounds were modeled in MCNP6 1.2 Beta, according to the source specifications dictated by the individuals who assayed the source. Verification of the source parameters with MCNP6 also serves as a means to test the alpha transport capabilities of MCNP6 1.2 Beta with TENDL 2012 alpha transport libraries. Good agreement in the comparison would indicate the accuracy of the source parameters in addition to demonstrating MCNP's capabilities in simulating (α, n) interactions.</p></div>","PeriodicalId":20407,"journal":{"name":"Physics Procedia","volume":"90 ","pages":"Pages 305-312"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.phpro.2017.09.016","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83269017","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: 3

Embedding carbon fibre structures in metal matrixes for additive manufacturing 在金属基体中嵌入碳纤维结构用于增材制造

Physics Procedia Pub Date : 2017-01-01 DOI: 10.1016/j.phpro.2017.08.016

Jan Frostevarg , Stephanie Robertson , Vicente Benavides , Alexander Soldatov

{"title":"Embedding carbon fibre structures in metal matrixes for additive manufacturing","authors":"Jan Frostevarg , Stephanie Robertson , Vicente Benavides , Alexander Soldatov","doi":"10.1016/j.phpro.2017.08.016","DOIUrl":"10.1016/j.phpro.2017.08.016","url":null,"abstract":"<div><p>It is possible to reinforce structures and components using carbon fibres for applications in electronics and medicine, but most commonly used in reinforcing resin fibre composites for personal protection equipment and light weight constructions. Carbon fibres act as stress redistributors while having increased electrical and thermal conductivities. These properties could also be utilized in metal matrixes, if the fibres are properly fused to the metal and the structure remains intact. Another recently developed high potential carbon structure, carbon nanotube- (CNT) yarns, has similar but even greater mechanical properties than common carbon fibres. Via laser cladding, these reinforcing materials could be used in a plethora of applications, either locally (or globally) as surface treatments or as structural reinforcements using multi-layer laser cladding (additive manufacturing). The challenges of embedding carbon fibres or CNT-yarns in a CuAl mixture and SnPb solder wire using lasers are here investigated using high speed imaging and SEM. It is revealed that the carbon fibres have very high buoyancy in the molten metal and quickly degrades when irradiated by the laser. Wetting of the fibres is shown to be improved by a Tungsten coating and embedding of the structures after processing are evaluated using SEM and Raman spectroscopy.</p></div>","PeriodicalId":20407,"journal":{"name":"Physics Procedia","volume":"89 ","pages":"Pages 39-48"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.phpro.2017.08.016","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90350948","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: 3

A Freeware Path to Neutron Computed Tomography 中子计算机断层扫描的免费软件路径

Physics Procedia Pub Date : 2017-01-01 DOI: 10.1016/j.phpro.2017.06.047

Burkhard Schillinger , Aaron E. Craft

{"title":"A Freeware Path to Neutron Computed Tomography","authors":"Burkhard Schillinger , Aaron E. Craft","doi":"10.1016/j.phpro.2017.06.047","DOIUrl":"10.1016/j.phpro.2017.06.047","url":null,"abstract":"<div><p>Neutron computed tomography has become a routine method at many neutron sources due to the availability of digital detection systems, powerful computers and advanced software. The commercial packages Octopus by Inside Matters and VGStudio by Volume Graphics have been established as a quasi-standard for high-end computed tomography. However, these packages require a stiff investment and are available to the users only on-site at the imaging facility to do their data processing. There is a demand from users to have image processing software at home to do further data processing; in addition, neutron computed tomography is now being introduced even at smaller and older reactors. Operators need to show a first working tomography setup before they can obtain a budget to build an advanced tomography system. Several packages are available on the web for free; however, these have been developed for X-rays or synchrotron radiation and are not immediately useable for neutron computed tomography. Three reconstruction packages and three 3D-viewers have been identified and used even for Gigabyte datasets. This paper is not a scientific publication in the classic sense, but is intended as a review to provide searchable help to make the described packages usable for the tomography community. It presents the necessary additional preprocessing in ImageJ, some workarounds for bugs in the software, and undocumented or badly documented parameters that need to be adapted for neutron computed tomography. The result is a slightly complicated, but surprisingly high-quality path to neutron computed tomography images in 3D, but not a replacement for the even more powerful commercial software mentioned above.</p></div>","PeriodicalId":20407,"journal":{"name":"Physics Procedia","volume":"88 ","pages":"Pages 348-353"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.phpro.2017.06.047","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72949888","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: 9

Characterization of a 6 MeV Accelerator Driven Mixed Neutron/Photon Source 6 MeV加速器驱动混合中子/光子源的表征

Physics Procedia Pub Date : 2017-01-01 DOI: 10.1016/j.phpro.2017.09.054

Matthew Hodges, Alexander Barzilov, Yi-Tung Chen, Daniel Lowe

引用次数: 4

Investigation of Cutting Quality of Remote DOE Laser Cutting in 0.5 mm Stainless Steel 0.5 mm不锈钢远程DOE激光切割质量研究

Physics Procedia Pub Date : 2017-01-01 DOI: 10.1016/j.phpro.2017.08.007

Sigurd Lazic Villumsen, Morten Kristiansen

引用次数: 0