Physics Procedia最新文献_第6页

Investigation of Spectral Lines Broadening in Femtosecond Laser Plasma Generated on the Surface of the Barium Water Solutions 飞秒激光等离子体在钡水溶液表面谱线展宽的研究

Physics Procedia Pub Date : 2017-01-01 DOI: 10.1016/j.phpro.2017.01.027

M.Yu. Babiy, S.S. Golik, A.A. Ilyin, Yu.S. Biryukova, T.M. Agapova, V.V. Lisitsa

引用次数: 1

Extended Stability of HPGe Spectrometer with Environmental Control at the High Flux Isotope Reactor 高通量同位素反应堆环境控制下HPGe谱仪扩展稳定性研究

Physics Procedia Pub Date : 2017-01-01 DOI: 10.1016/j.phpro.2017.09.046

Jordan Heim , Jonathan Nistor , David Koltick

引用次数: 1

Structure and Electronic Properties of Nano-complex CCl4…Cr(AcacCl)3 on Evidence Derived from Vibrational Spectroscopy 纳米配合物CCl4…Cr(AcacCl)3的结构和电子性质——基于振动谱的证据

Physics Procedia Pub Date : 2017-01-01 DOI: 10.1016/j.phpro.2017.01.012

S.N. Slabzhennikov, L.A. Kuarton, O.B. Ryabchenko

引用次数: 0

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

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

Weldability of Aluminium Alloys for Automotive Applications 汽车用铝合金的可焊性

Physics Procedia Pub Date : 2017-01-01 DOI: 10.1016/j.phpro.2017.08.011

D. Löveborn, J.K. Larsson, K.-A. Persson

{"title":"Weldability of Aluminium Alloys for Automotive Applications","authors":"D. Löveborn, J.K. Larsson, K.-A. Persson","doi":"10.1016/j.phpro.2017.08.011","DOIUrl":"10.1016/j.phpro.2017.08.011","url":null,"abstract":"<div><p>Restrictions in CO<sub>2</sub>-emissions have caused increased demands on decreased weight and increased use of lightweight materials in the automotive industry. Aluminium has shown to be of great interest due to its beneficial weight to strength ratio, and are suitable for hang-on parts such as roof, doors etc. However, the use of aluminium requires reliable joining techniques. This project has been focusing on laser welding of aluminium. It have been reported earlier that hot cracks and porosity are common defects while joining aluminium with laser welding. The aim with this project has been to produce crack free laser welds while joining thin aluminium sheets. Two different optics have been used in this project, oscillating- and triple-spot optics. The results from the experiments show that both the oscillating optics and the triple-spot optics can produce crack free welds. The amount of pores is shown to be low for both cases. The results do also show that the amount of pores in the welds increases with the weld length while the flange length is of minor impact. The mechanical properties are similar for the both optics. The oscillation specimens receive a higher tensile strength while the triple-spot specimens receive a larger elongation at break value.</p></div>","PeriodicalId":20407,"journal":{"name":"Physics Procedia","volume":"89 ","pages":"Pages 89-99"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.phpro.2017.08.011","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80853998","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: 26

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