Results 251 to 260 of about 515,838 (299)

Micro-Gap Chambers with self-aligned geometry

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1998
Abstract We report on the performance of Micro-Gap Chambers is manufactured at Strasbourg. We present measurements of gain as a function of various operating parameters, such as high voltages and various gas mixtures. With the optimal mixture of Ne–DME (70–30%), a cathode voltage of −500 V and a drift voltage of −2900 V, a gain of ∼3000 is achieved ...
Barthe, S., Bergdolt, A.M., Brom, J.M., Coffin, J., Eberle, H., Geist, W., Helleboid, J.M., Hoffer, M., Kapp, M.R., Pralavorio, P., Sigward-Raclot, M.H., Schunck, J.P., Schuster, G., Wortmann, R., Iasshvili, I., Kharchilava, A.   +15 more
openaire   +1 more source

Micro-scale Geometry Measurement

2017
The ability to produce complex, high-precision, miniature components is key to the transition to high-value manufacturing. The advanced manufacturing industries, using precision machining techniques, such as diamond turning, injection moulding, micro-milling and micro-electro-discharge machining, currently have a number of capabilities for measuring ...
Samanta Piano, Rong Su, Richard Leach
openaire   +1 more source

Replication of micro and nano surface geometries

CIRP Annals, 2011
Abstract The paper describes the state-of-the-art in replication of surface texture and topography at micro and nano scale. The description includes replication of surfaces in polymers, metals and glass. Three different main technological areas enabled by surface replication processes are presented: manufacture of net-shape micro/nano surfaces ...
Hansen, H.N., Hocken, R.J., Tosello, G.
openaire   +1 more source

Geometry optimization for micro-pressure sensor considering dynamic interference

Review of Scientific Instruments, 2014
Presented is the geometry optimization for piezoresistive absolute micro-pressure sensor. A figure of merit called the performance factor (PF) is defined as a quantitative index to describe the comprehensive performances of a sensor including sensitivity, resonant frequency, and acceleration interference.
Zhongliang, Yu, Yulong, Zhao, Lili, Li, Bian, Tian, Cun, Li   +4 more
openaire   +2 more sources

Geometry and surface damage in micro electrical discharge machining of micro-holes

Journal of Micromechanics and Microengineering, 2009
Geometry and subsurface damage of blind micro-holes produced by micro electrical discharge machining (micro-EDM) is investigated experimentally to explore the relational dependence with respect to pulse energy. For this purpose, micro-holes are machined with various pulse energies on plastic mold steel samples using a tungsten carbide tool electrode ...
Atakan Sayar, Tahsin Tecelli Öpöz, Bülent Ekmekci, Abdulkadir Erden   +3 more
openaire   +2 more sources

InGaN light emitting diodes of micro‐ring geometry

physica status solidi (c), 2003
The fabrication and performance of an InGaN light-emitting diode (LED) array based on a micro-ring device geometry is reported. This design has been adopted in order to increase the surface area for light extraction and to minimize losses due to internal reflections and re-absorption.
Choi, H.W., Jeon, C.W., Dawson, M.D.
openaire   +2 more sources

Influence of Micro Geometry Modification on Gear Dynamics

SAE Technical Paper Series, 2020
<div class="section abstract"><div class="htmlview paragraph">Gearbox behavior is strictly affected by gears, shaft, bearings and casing stiffnesses. As a matter of fact, their contribution to gear dynamics is fundamental for mechanical transmissions design.
Rosso C., Bruzzone F., Maggi T., Marcellini C.   +3 more
openaire   +1 more source

Sensors for Optical 3D Measurements of Micro Geometries

NCSLI Measure, 2012
This paper provides an overview of some of the optical measurement techniques for dimensional measurements of surface topographies.
Holger Bremer, Ulrich Neuschaefer-Rube, Thomas Birth   +2 more
openaire   +1 more source

Micro-machining of 3D geometries for medical applications

AIP Conference Proceedings, 2012
The use of conventional machining processes has been subject to important decline probably due to the increment in the use of emerging technologies. Therefore, the main applications of these traditional processes, such as automotive industry, are in crisis. In order to have a chance to compete successfully in the new trends, the machining industry must
J. Gomar, A. Amaro, E. Vázquez, J. Ciurana, C. Rodríguez   +4 more
openaire   +1 more source

Control wetting state transition by micro-rod geometry

Applied Surface Science, 2013
Abstract Understanding the effect of micro-structure geometry on wetting state transition is important to design and control surface wettability. Micro-rod model was proposed and the relationship between micro-rod geometry and wetting state was investigated in the paper taking into account only the surface roughness and neglecting the chemistry ...
Yang He, Chengyu Jiang, Shengkun Wang, Hengxu Yin, Weizheng Yuan   +4 more
openaire   +1 more source