发布求助
文献互助 智能选刊 最新文献

Physics Procedia最新文献

筛选
英文 中文
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 Epub Date: 2017-02-20 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
{"title":"Investigation of Spectral Lines Broadening in Femtosecond Laser Plasma Generated on the Surface of the Barium Water Solutions","authors":"M.Yu. Babiy,&nbsp;S.S. Golik,&nbsp;A.A. Ilyin,&nbsp;Yu.S. Biryukova,&nbsp;T.M. Agapova,&nbsp;V.V. Lisitsa","doi":"10.1016/j.phpro.2017.01.027","DOIUrl":"10.1016/j.phpro.2017.01.027","url":null,"abstract":"<div><p>The spectral lines broadening in femtosecond laser plasma generated by the 45 fs Ti:Sa laser pulses on the surface of the water solutions of Ba is investigated. Under the experimental conditions, determined the temperature of femtosecond laser plasma is 3000K.The contribution of the Doppler broadening for spectral lines width is minimal and amounts 0,0022<!--> <!-->nm for Ba. The main mechanism of Ba spectral line broadening in experimental conditions is resonance. The resulting values of resonance broadening constitute a0,0349<!--> <!-->nm for Ba I (413,24<!--> <!-->nm), 0,0563<!--> <!-->nm for Ba I (553,54<!--> <!-->nm), 0,0241<!--> <!-->nm for Ba II(455,41<!--> <!-->nm), 0,0437<!--> <!-->nm for Ba II (614,17<!--> <!-->nm).</p></div>","PeriodicalId":20407,"journal":{"name":"Physics Procedia","volume":"86 ","pages":"Pages 92-97"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.phpro.2017.01.027","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82509820","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
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 Epub Date: 2017-10-26 DOI: 10.1016/j.phpro.2017.09.046
Jordan Heim , Jonathan Nistor , David Koltick
{"title":"Extended Stability of HPGe Spectrometer with Environmental Control at the High Flux Isotope Reactor","authors":"Jordan Heim ,&nbsp;Jonathan Nistor ,&nbsp;David Koltick","doi":"10.1016/j.phpro.2017.09.046","DOIUrl":"10.1016/j.phpro.2017.09.046","url":null,"abstract":"<div><p>A High Purity Germanium (HPGe) spectrometer has been designed and constructed for making precision measurements over extended time periods at the High Flux Isotope Reactor (HFIR) located at Oak Ridge National Lab (ORNL). Toward the effort of achieving long-term system stability and high spectral resolution, local environment control is utilized as part of the system design. Further, the remote operation of the spectrometer is aided by live-streaming system conditions and automatic out-of-range alert messaging. System performance over the 7-month Phase I period is presented.</p></div>","PeriodicalId":20407,"journal":{"name":"Physics Procedia","volume":"90 ","pages":"Pages 429-434"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.phpro.2017.09.046","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84302801","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
Weldability of Aluminium Alloys for Automotive Applications 汽车用铝合金的可焊性
Physics Procedia Pub Date : 2017-01-01 Epub Date: 2017-09-26 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,&nbsp;J.K. Larsson,&nbsp;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
The Structure and Properties of the Samples Produced by Selective Laser Melting of 410L Steel-based Metal Powder 410L钢基金属粉末选择性激光熔化试样的组织和性能
Physics Procedia Pub Date : 2017-01-01 Epub Date: 2017-09-26 DOI: 10.1016/j.phpro.2017.08.013
Artem Deev, Pavel Kuznetsov, Anton Zhukov, Vitaliy Bobyr
{"title":"The Structure and Properties of the Samples Produced by Selective Laser Melting of 410L Steel-based Metal Powder","authors":"Artem Deev,&nbsp;Pavel Kuznetsov,&nbsp;Anton Zhukov,&nbsp;Vitaliy Bobyr","doi":"10.1016/j.phpro.2017.08.013","DOIUrl":"10.1016/j.phpro.2017.08.013","url":null,"abstract":"<div><p>Additive technologies, which obtained the wide spreading in the last decade, allow producing items of any shape from metal materials practically without additional mechanical treatment. This approach based on the layer by layer melting of powder material accordingly to the premade 3D-CAD model, provides the geometrical accuracy which mostly depends on the size of the used material. In the present study, as material a 410 L steel powder was chosen, for which the basic dependencies between the selective laser melting (SLM) parameters and the mechanical properties were determined. Trial batches of standard samples for uniaxial tension and impact strength tests (according to the ASTM A370 and ASTM E8<!--> <!-->M standards) were produced. It was shown that in the as build (after SLM) the fracture appeared to be brittle with the impact strength 3-5<!--> <!-->J/cm<sup>2</sup>. The carried out heat treatment of quenching-tempering cycle and subsequent tests provide the viscous fracture and evaluation of impact strength up to 20-30<!--> <!-->J/cm<sup>2</sup>. Presumably, this is due to a refinement of the grain structure and the inner stresses reduction of the samples, which also acknowledges the execution EBSD analysis, which points to the presence of quenched and tempered martensite. The presence of high inner stresses can be attributed to two α-γ-α transformations that were revealed by dilatometry investigation. In the range of cooling or heating rates from 1 to 500<!--> <!-->°C/s temperatures of phase transformation are shifted.</p></div>","PeriodicalId":20407,"journal":{"name":"Physics Procedia","volume":"89 ","pages":"Pages 31-38"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.phpro.2017.08.013","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81932474","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: 6
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 Epub Date: 2017-02-20 DOI: 10.1016/j.phpro.2017.01.013
A.D. Bezpaly, V.M. Shandarov
{"title":"Optical Formation of Waveguide Elements in Photorefractive Surface Layer of a Lithium Niobate Sample","authors":"A.D. Bezpaly,&nbsp;V.M. Shandarov","doi":"10.1016/j.phpro.2017.01.013","DOIUrl":"10.1016/j.phpro.2017.01.013","url":null,"abstract":"<div><p>Formation of channel optical waveguides due to the sequential point-to-point exposure of local stripe-like regions of Y-cut lithium niobate sample surface is experimentally investigated. The surface layer of the sample is thermally doped with Cu ions to increase its photorefractive sensitivity. The laser radiation with wavelength of 532 nm and optical power of 10 mW is used for the crystal exposure in experiments. The optical inhomogeneities formed during the sample exposure are studied with their probing by laser beams with wavelength of 633 nm.</p></div>","PeriodicalId":20407,"journal":{"name":"Physics Procedia","volume":"86 ","pages":"Pages 166-169"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.phpro.2017.01.013","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74706273","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: 5
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 Epub Date: 2017-02-20 DOI: 10.1016/j.phpro.2017.01.012
S.N. Slabzhennikov, L.A. Kuarton, O.B. Ryabchenko
{"title":"Structure and Electronic Properties of Nano-complex CCl4…Cr(AcacCl)3 on Evidence Derived from Vibrational Spectroscopy","authors":"S.N. Slabzhennikov,&nbsp;L.A. Kuarton,&nbsp;O.B. Ryabchenko","doi":"10.1016/j.phpro.2017.01.012","DOIUrl":"10.1016/j.phpro.2017.01.012","url":null,"abstract":"<div><p>In order to specify influence of intermolecular interaction on IR spectrum of interacting species, an investigation of a process CCl<sub>4</sub> + Сr(АcacCl)<sub>3</sub> → CCl<sub>4</sub>…Сr(АcacCl)<sub>3</sub> has been performed by means of Hartree–Fock–Roothaan method in MIDI basis set with p- and d- polarization functions. An estimation of intermolecular interaction in geometrical parameters, electron density function both between interacting particles and inside themselves, frequencies and intensities of normal modes has been carried out. Chemical bonds with the most significant shifts of characteristics under formation of nano-complex CCl<sub>4</sub>…Сr(АcacCl)<sub>3</sub> have been noted.</p></div>","PeriodicalId":20407,"journal":{"name":"Physics Procedia","volume":"86 ","pages":"Pages 32-36"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.phpro.2017.01.012","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81767914","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: 0
Neutron Microtomography of MgB2 Superconducting Multifilament Wire MgB2超导多丝线的中子显微层析成像
Physics Procedia Pub Date : 2017-01-01 Epub Date: 2017-06-24 DOI: 10.1016/j.phpro.2017.06.012
Pavel Trtik , Christian Scheuerlein , Patrick Alknes , Michael Meyer , Florian Schmid , Eberhard Lehmann
{"title":"Neutron Microtomography of MgB2 Superconducting Multifilament Wire","authors":"Pavel Trtik ,&nbsp;Christian Scheuerlein ,&nbsp;Patrick Alknes ,&nbsp;Michael Meyer ,&nbsp;Florian Schmid ,&nbsp;Eberhard Lehmann","doi":"10.1016/j.phpro.2017.06.012","DOIUrl":"10.1016/j.phpro.2017.06.012","url":null,"abstract":"<div><p>Neutron imaging of sub-10-micrometres spatial resolution has been recently achieved in 2D mode within the framework of the Neutron Microscope project at the Paul Scherrer Institut. Here we report on the development of the PSI Neutron Microscope instrument and the results of the first microtomographic imaging experiment of multifilament superconducting MgB<sub>2</sub> wire. The sample of MgB<sub>2</sub> superconducting 37 multifilaments embedded in copper-nickel matrix was investigated –in microtomographic mode– with the scientific interest regarding the distribution of boron within the individual superconducting filaments (about 40<!--> <!-->μm in diameter). The resulting tomographic dataset revealed the distribution of boron within the entire 0.8<!--> <!-->mm thick multifilamental wire with the isotropic voxel size of 2.6 micrometres.</p></div>","PeriodicalId":20407,"journal":{"name":"Physics Procedia","volume":"88 ","pages":"Pages 95-99"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.phpro.2017.06.012","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72734537","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
Staging of RF-accelerating Units in a MEMS-based Ion Accelerator 基于mems的离子加速器中射频加速单元的分段
Physics Procedia Pub Date : 2017-01-01 Epub Date: 2017-10-26 DOI: 10.1016/j.phpro.2017.09.040
A. Persaud , P.A. Seidl , Q. Ji , E. Feinberg , W.L. Waldron , T. Schenkel , S. Ardanuc , K.B. Vinayakumar , A. Lal
{"title":"Staging of RF-accelerating Units in a MEMS-based Ion Accelerator","authors":"A. Persaud ,&nbsp;P.A. Seidl ,&nbsp;Q. Ji ,&nbsp;E. Feinberg ,&nbsp;W.L. Waldron ,&nbsp;T. Schenkel ,&nbsp;S. Ardanuc ,&nbsp;K.B. Vinayakumar ,&nbsp;A. Lal","doi":"10.1016/j.phpro.2017.09.040","DOIUrl":"10.1016/j.phpro.2017.09.040","url":null,"abstract":"<div><p>Multiple Electrostatic Quadrupole Array Linear Accelerators (MEQALACs) provide an opportunity to realize compact radio- frequency (RF) accelerator structures that can deliver very high beam currents. MEQALACs have been previously realized with acceleration gap distances and beam aperture sizes of the order of centimeters. Through advances in Micro-Electro-Mechanical Systems (MEMS) fabrication, MEQALACs can now be scaled down to the sub-millimeter regime and batch processed on wafer substrates. In this paper we show first results from using three RF stages in a compact MEMS-based ion accelerator. The results presented show proof-of-concept with accelerator structures formed from printed circuit boards using a 3 × 3 beamlet arrangement and noble gas ions at 10 keV. We present a simple model to describe the measured results. We also discuss some of the scaling behaviour of a compact MEQALAC. The MEMS-based approach enables a low-cost, highly versatile accelerator covering a wide range of currents (10<!--> <!-->μA to 100<!--> <!-->mA) and beam energies (100 keV to several MeV). Applications include ion-beam analysis, mass spectrometry, materials processing, and at very high beam powers, plasma heating.</p></div>","PeriodicalId":20407,"journal":{"name":"Physics Procedia","volume":"90 ","pages":"Pages 136-142"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.phpro.2017.09.040","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75799204","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: 4
A Study on Inhomogeneous Neutron Intensity Distribution Origin from Neutron Guide Transportation 中子导输引起的非均匀中子强度分布研究
Physics Procedia Pub Date : 2017-01-01 Epub Date: 2017-06-24 DOI: 10.1016/j.phpro.2017.06.048
Yu Wang, Guohai Wei, Hongli Wang, Yuntao Liu, Linfeng He, Kai Sun, Songbai Han, Dongfeng Chen
{"title":"A Study on Inhomogeneous Neutron Intensity Distribution Origin from Neutron Guide Transportation","authors":"Yu Wang,&nbsp;Guohai Wei,&nbsp;Hongli Wang,&nbsp;Yuntao Liu,&nbsp;Linfeng He,&nbsp;Kai Sun,&nbsp;Songbai Han,&nbsp;Dongfeng Chen","doi":"10.1016/j.phpro.2017.06.048","DOIUrl":"10.1016/j.phpro.2017.06.048","url":null,"abstract":"<div><p>The uniformity of the neutron intensity spatial distribution at the sample position will directly affect the neutron imaging quality. But the unexpected inhomogeneous spatial distribution phenomenon always appears in the neutron radiography facilities installed at the end of neutron guide. In this paper, the source of this phenomenon has been analyzed through geometrical optics and confirmed by Monte Carlo simulations, and several optimization solutions are also proposed.</p></div>","PeriodicalId":20407,"journal":{"name":"Physics Procedia","volume":"88 ","pages":"Pages 354-360"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.phpro.2017.06.048","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79068768","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
Refractive Index Measurement Using the Laser Profiler 利用激光剖面仪测量折射率
Physics Procedia Pub Date : 2017-01-01 Epub Date: 2017-02-20 DOI: 10.1016/j.phpro.2017.01.018
Vladislav Kolchinskiy , Cheng-Hung Shih , Ikai Lo , Roman Romashko
{"title":"Refractive Index Measurement Using the Laser Profiler","authors":"Vladislav Kolchinskiy ,&nbsp;Cheng-Hung Shih ,&nbsp;Ikai Lo ,&nbsp;Roman Romashko","doi":"10.1016/j.phpro.2017.01.018","DOIUrl":"10.1016/j.phpro.2017.01.018","url":null,"abstract":"<div><p>The paper proposes a method for measuring the refractive index of the plane-parallel samples of the material using laser profiler. The method is based on measurement of the displacement due to refraction of the laser beam passing through a sample of known geometry. The developed method was used to measure the refractive index of gallium nitride on the range of optical wavelengths (470, 561 and 632<!--> <!-->nm). The measurement error of the refractive index was 10<sup>-3</sup>. The experimentally obtained values of the refractive index match with the reference data within measurement error. The relative simplicity of the measurement procedures distinguishes this method.</p></div>","PeriodicalId":20407,"journal":{"name":"Physics Procedia","volume":"86 ","pages":"Pages 176-180"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.phpro.2017.01.018","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89244245","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: 6
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信
小红书