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Suchbegriff:

FEM Design of Interferometric FBGL Based Accelerometer for Underwater Applications

Malu Balachandran [1], R Rajesh [1], Sreehari C V [1], Khansa C A [1], K P B Moosad [1],
[1] Naval Physical and Oceanographic Laboratory, Kochi, Kerala, India

Fiber optic sensors have been designed for applications ranging from simple proximity detectors to state of the art inertial navigation systems. The optical sensing technique used in each of these applications depends primarily on the requirements. Fiber Bragg Grating Laser (FBGL) based ... Mehr lesen

Simulation of Electro-Thermal Transients in Superconducting Accelerator Magnets

L. Bortot [1], M. Maciejewski [2], M. Prioli [1], B. Auchmann [3],
[1] CERN, Geneva, Switzerland
[2] CERN, Geneva, Switzerland; Lodz University of Technology, Lodz, Poland
[3] CERN, Geneva, Switzerland; Paul Scherrer Institute, Zurich, Switzerland

The paper presents the application of COMSOL Multiphysics® software to the modelling of superconducting accelerator magnets. A 2D magneto-thermal model is developed, using an equivalent magnetization formulation to take into account the eddy-currents’ effects. Due to the model ... Mehr lesen

Direct and Indirect Coupling Mechanisms in a Chiral Plasmonic System

Zhongyue Zhang [1], Yuyan Chen [1],
[1] School of Physics and Information Technology, Shaanxi Normal University, Xi’an, China

手性等离激元纳米结构被广泛研究并用于生物监测、分析化学和负折射率介质方面。在该结构中直接耦合的机制已经在相关研究中被发现。我们提出由金膜分隔两个金纳米棒(TNMF)的结构(图1)，并发现了间接耦合机制。在 COMSOL Multiphysics® 中，射频电磁波，频域接口用于求解正弦时变电磁场分布，选此接口计算 TNMF 结构的光学响应。插值函数用来设置金的折射率；设置边界条件模拟周期性结构阵列。结果可通过端口2对端口1的响应获得，并可查看每个数据点的电场、电荷等分布。应用程序库中射频模块的“Plasmonic wire grating ... Mehr lesen

Tunable Resonance of Star Shaped Nanostructures

R. Díaz de León-Zapata [1,2], B. Mora [2], M. Jose-Yacaman [3], F. J. Gonzalez [2]
[1] Instituto Tecnológico de San Luis Potosí, Av. Tecnológico s/n, San Luis Potosí, S.L.P., Mexico
[2] Universidad Autónoma de San Luis Potosí, CIACyT, San Luis Potosí, S.L.P., Mexico
[3] University of Texas at San Antonio, San Antonio, TX, USA

Auto assembled Ag-ZnO [1] star shaped nanostructures depicted in figure 1, presents their natural electromagnetic resonance at 60 THz. In this work we present that is possible to change this value by covering it with a variable in thickness layer of gold. The analysis is performed by ... Mehr lesen

Multiphysics Studies for the Micromegas Detector

E. Karentzos [1], T. Alexopoulos [2],
[1] National Technical University of Athens, CERN, Switzerland
[2] National Technical University of Athens, Greece

We present studies of the electric field configuration that guides the electrons to the strips through the mesh and its importance to the detector’s optimal operation. Furthermore, analysis of the gas propagation inside the chamber for different gas distribution schemes is discussed. All ... Mehr lesen

Pulsed Eddy Current Probe Development to Detect Inner Layer Cracks Near Ferrous Fasteners Using COMSOL Modeling Software

V. Babbar[1], P. Whalen[1], T. Krause[1]
[1]Department of Physics, Royal Military College of Canada, Kingston, ON, Canada

Surface breaking cracks in conductive structures can be detected by conventional eddy current techniques. However, it is very difficult to detect inner layer defects in multilayered conductive structures either by conventional eddy current or ultrasonic methods. The transient/pulsed eddy ... Mehr lesen

Iterative Electric Potential Adjustment of Damaged Naval Vessels Using the Onboard ICCP-System

C. Thiel [1], K. Neumann [1], C. Broecheler [1], F. Ludwar [2], A. Rennings [1], J. Doose [2], D. Erni [1],
[1] General and Theoretical Electrical Engineering (ATE), University of Duisburg-Essen, and CENIDE – Center for Nanointegration Duisburg-Essen, Duisburg, Germany
[2] Technical Center for Ships and Naval Weapons, Naval Technology and Research (WTD 71), Eckernförde, Germany

Naval vessels involuntary communicate with their surrounding environment via different signatures, which can be separated in acoustic, electric, magnetic, seismic and pressure signatures. The electric signature, also known as Underwater Electric Potential (UEP)-Signature is mainly caused ... Mehr lesen

Towards the Modeling of Microgalvanic Corrosion in Aluminum Alloys: the Choice of Boundary Conditions

N. Murer[1], N. Missert[2], and R. Bucchheit[1]

[1]Fontana Corrosion Center, Ohio State University, Columbus, OH, USA
[2]Sandia National Laboratories, Albuquerque, NM, USA

Aluminum alloys in near-neutral, mildly aggressive solutions, undergo damage accumulation during corrosion, mostly due to the presence of micrometer-sized constituent intermetallic particles (IMP) that create a microstructural discontinuity at which localized corrosion occurs. The ... Mehr lesen

Modeling Plasmonic Structure Integrated Single-Photon Detectors to Maximize Polarization Contrast

M. Csete [1], A. Szenes [1], G. Szekeres [1], B. Banhelyi [2], T. Csendes [2], G. Szabo [1],
[1] Department of Optics and Quantum Electronics, University of Szeged, Szeged, Hungary
[2] Institute of Informatics, University of Szeged, Szeged, Hungary

Introduction: Single-photon detectors capable of ensuring high fidelity read-out of quantum information delivered via photons of specific polarization are crucial in QIP [1]. Our previous studies have shown that different types of one dimensional plasmonic structures enhance the ... Mehr lesen

Multiphysics Simulations for the Design of a Superconducting Magnet for Proton Therapy

C. Calzolaio [1], H. Carolin [1], S. Stephane [1],
[1] Paul Scherrer Institut, Villigen, Switzerland

The use of proton therapy for cancer treatment shows a growing trend, since the radiation dose delivered to the target volume is maximized and the dose to the surrounding healthy tissues is minimized. To direct the proton beam from all directions to the tumor in the patient, the last ... Mehr lesen

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