Measurements with a capacitance gauge for sub-nanometer thermal expansion characterization of optical components

2021 ◽  
Author(s):  
Kevin G. Harding
Keyword(s):  
Thermal Expansion ◽  
Optical Components ◽  
Capacitance Gauge

Microstructural and Microchemical Characterization of Nickel Sulfide Inclusions in Plate Glass

1991 ◽  
Vol 49 ◽  
pp. 962-963
Author(s):  
J. Cooper ◽  
O. Popoola ◽  
W. M. Kriven
Keyword(s):  
Thermal Expansion ◽  
Phase Transformation ◽  
Glass Matrix ◽  
Nickel Sulfide ◽  
Plate Glass ◽  
Thermal Expansion Mismatch ◽  
Volume Increase ◽  
Β Phase ◽  
Microchemical Characterization

Nickel sulfide inclusions have been implicated in the spontaneous fracture of large windows of tempered plate glass. Two alternative explanations for the fracture-initiating behaviour of these inclusions have been proposed: (1) the volume increase which accompanies the α to β phase transformation in stoichiometric NiS, and (2) the thermal expansion mismatch between the nickel sulfide phases and the glass matrix. The microstructure and microchemistry of the small inclusions (80 to 250 μm spheres), needed to determine the cause of fracture, have not been well characterized hitherto. The aim of this communication is to report a detailed TEM and EDS study of the inclusions.

scholarly journals The Low Density Matter (LDM) beamline at FERMI: optical layout and first commissioning

2015 ◽  
Vol 22 (3) ◽  
pp. 538-543 ◽  
Author(s):  
Cristian Svetina ◽  
Cesare Grazioli ◽  
Nicola Mahne ◽  
Lorenzo Raimondi ◽  
Claudio Fava ◽  
...  
Keyword(s):  
Transport System ◽  
Free Electron ◽  
Free Electron Laser ◽  
Low Density ◽  
Optical Components ◽  
Photon Transport ◽  
Physics Community ◽  
Optical Layout ◽  
Density Matter

The Low Density Matter (LDM) beamline has been built as part of the FERMI free-electron laser (FEL) facility to serve the atomic, molecular and cluster physics community. After the commissioning phase, it received the first external users at the end of 2012. The design and characterization of the LDM photon transport system is described, detailing the optical components of the beamline.

Spectrophotometer design for the characterization of coated optical components

1991 ◽  
Vol 62 (4) ◽  
pp. 940-943
Author(s):  
Peter C. LaDelfe ◽  
D. B. Stahl
Keyword(s):  
Optical Components

scholarly journals The effect of thermal expansion on diffusion flame instabilities

2010 ◽  
Vol 647 ◽  
pp. 453-472 ◽  
Author(s):  
M. MATALON ◽  
P. METZENER
Keyword(s):  
Thermal Expansion ◽  
Diffusion Flame ◽  
Initial Mixture ◽  
Surprising Result ◽  
Flame Instability ◽  
Preferential Diffusion ◽  
The Stability ◽  
Flame Instabilities ◽  
Comprehensive Characterization

In this paper we examine the effect of thermal expansion on the stability of a planar unstrained diffusion flame and provide a comprehensive characterization of diffusive-thermal instabilities while realistically accounting for density variations. The possible patterns that are likely to be observed as a result of differential and preferential diffusion are identified for a whole range of parameters including the distinct Lewis numbers associated with the fuel and oxidizer, the initial mixture strength and the flow conditions. Although we find that thermal expansion has a marked influence on flame instability, it does not play a crucial role as it does in premixed combustion. It primarily affects the parameter regime associated with the onset of the instabilities and the growth rate of the unstable modes. Perhaps the most surprising result is that its has a different influence on the various modes of instability – a destabilizing influence on the formation of cellular structures and a stabilizing influence on the onset of oscillations.

Characterization of Phase Transitions Occurring in Solution Treated Ti-15Mo during Heating by Thermal Expansion and Electrical Resistance Measurements

2016 ◽  
Vol 879 ◽  
pp. 2318-2323 ◽  
Author(s):  
Pavel Zháňal ◽  
Petr Harcuba ◽  
Michal Hájek ◽  
Jana Šmilauerová ◽  
Jozef Veselý ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Titanium Alloy ◽  
Phase Transitions ◽  
Electrical Resistance ◽  
Temperature Changes ◽  
Solution Treated ◽  
Electrical Resistance Measurements ◽  
Ongoing Phase

Metastable β titanium alloy Ti-15Mo was investigated in this study. In-situ electrical resistance and thermal expansion measurements conducted on solution treated material revealed influence of ongoing phase transitions on measured properties. The monotonicity of the dependence of electrical resistance on temperature changes at 225, 365 and 560 °C The thermal expansion deviates from linearity between 305 and 580 °C.

Characterization of optical components for the ESS Target Imaging System

2020 ◽  
Vol 136 ◽  
pp. 106329 ◽  
Author(s):  
N. Borghi ◽  
B. Lauritzen ◽  
L. Lindvold ◽  
N. Poolton
Keyword(s):  
Imaging System ◽  
Optical Components ◽  
Target Imaging

Characterization of the PTB EUV reflectometry facility for large EUVL optical components

2003 ◽  
Author(s):  
Johannes Tummler ◽  
Heike Blume ◽  
Guido Brandt ◽  
Jens Eden ◽  
Bernd Meyer ◽  
...  
Keyword(s):  
Optical Components

scholarly journals Thermomechanical characterization of a low viscosity PA66 thermoplastic matrix and associated continuous glass fibre composite under processing conditions

2019 ◽  
Vol 53 (22) ◽  
pp. 3169-3186 ◽  
Author(s):  
Mael Péron ◽  
Frédéric Jacquemin ◽  
Pascal Casari ◽  
Gilles Orange ◽  
Jean-Luc Bailleul ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Fibre Composite ◽  
Thermomechanical Properties ◽  
Dynamic Mechanical ◽  
Low Viscosity ◽  
Thermoplastic Matrix ◽  
Dynamic Mechanical Analyser ◽  
Analytical Relations ◽  
Thermoplastic Resins

Characterizing the thermomechanical properties of thermoplastic resins and associated composites is of outmost importance to understand the development of process-induced stresses. To that extent, the characterization of a low viscosity PA66 matrix is proposed thanks to a homemade volumetric dilatometer named PvT-XT and a dynamic mechanical analyser on a wide temperature range. The PvT-XT results, reported for the first time, permit to identify the evolution of the coefficients of thermal expansion, of crystallization shrinkage and of the bulk modulus with temperature. Dynamic mechanical analyser experiments lead to the estimation of the Young’s modulus. The shear modulus as well as the Poisson’s ratio are then estimated thanks to analytical relations for isotropic and homogeneous materials. These properties are used to feed a new analytical model estimating the coefficients of thermal expansion of quasi-unidirectional composites. All the results are compared with the values from the literature or from complementary experiments, showing a good agreement which permits to validate the developed methodology.

Vector Signal Characterization of High-Speed Optical Components by Use of Linear Optical Sampling With Milliradian Resolution

2008 ◽  
Vol 20 (23) ◽  
pp. 2007-2009 ◽  
Author(s):  
P. A. Williams ◽  
T. Dennis ◽  
I. Coddington ◽  
W. C. Swann ◽  
N. R. Newbury
Keyword(s):  
High Speed ◽  
Optical Components ◽  
Optical Sampling ◽  
Linear Optical ◽  
Signal Characterization ◽  
Vector Signal
Sign in / Sign up

Export Citation Format

Share Document