An experimental setup for the simultaneous measurement of thermoelectric power of two samples from 77 K to 500 K

2014 ◽  
Vol 85 (8) ◽  
pp. 085115 ◽  
Author(s):  
T. S. Tripathi ◽  
M. Bala ◽  
K. Asokan
Keyword(s):  
Thermoelectric Power ◽  
Simultaneous Measurement ◽  
Experimental Setup ◽  
Two Samples

scholarly journals Experimental setup for the measurement of the thermoelectric power in zero and applied magnetic field

2010 ◽  
Vol 21 (5) ◽  
pp. 055104 ◽  
Author(s):  
Eundeok Mun ◽  
Sergey L Bud'ko ◽  
Milton S Torikachvili ◽  
Paul C Canfield
Keyword(s):  
Magnetic Field ◽  
Thermoelectric Power ◽  
Applied Magnetic Field ◽  
Experimental Setup

scholarly journals Compact Laser Collimation System for Simultaneous Measurement of Five-Degree-of-Freedom Motion Errors

2020 ◽  
Vol 10 (15) ◽  
pp. 5057
Author(s):  
Chuang Sun ◽  
Sheng Cai ◽  
Yusheng Liu ◽  
Yanfeng Qiao
Keyword(s):  
Simultaneous Measurement ◽  
Measurement Accuracy ◽  
Measurement Data ◽  
Optical Path ◽  
Degree Of Freedom ◽  
Experimental Setup ◽  
Collimation System ◽  
Optical Configuration ◽  
Series Of Experiments ◽  
The Common

A compact laser collimation system is presented for the simultaneous measurement of five-degree-of-freedom motion errors. The optical configuration of the proposed system is designed, and the principle of the measurement of five-degree-of-freedom errors is described in detail. The resolution of the roll and the horizontal straightness is doubled compared with other laser collimation methods. A common optical path compensation method is provided to detect light drift in real time and compensate for straightness and angle errors. An experimental setup is constructed, and a series of experiments are performed to verify the feasibility and stability of the system. Compared with commercial instruments, the pitch and yaw residuals are ± 2.5 ″ and ± 3.5 ″ without correction, and the residuals are ± 1.9 ″ and ± 2.8 ″ after correction, respectively. The comparison deviations of the horizontal straightness and vertical straightness changed from ± 4.8   μ m to ± 2.8 μm and ± 5.9 μm to ± 3.6 μm, respectively. The comparison deviation of the roll is ± 4.3 ″ . The experimental results show that the data of the five-degree-of-freedom measurement system obtained are largely the same as the measurement data of commercial instruments. The common optical path compensation can effectively improve the measurement accuracy of the system.

The Electrical Resistivity, Thermal Conductivity, and Thermoelectric Power of Calcium from 30 K to 300 K

1975 ◽  
Vol 53 (5) ◽  
pp. 486-497 ◽  
Author(s):  
J. G. Cook ◽  
M. J. Laubitz ◽  
M. P. Van der Meer
Keyword(s):  
Thermal Conductivity ◽  
Electrical Resistivity ◽  
Band Structure ◽  
Large Deviations ◽  
Transport Properties ◽  
Thermoelectric Power ◽  
Band Model ◽  
Residual Resistance ◽  
Two Samples ◽  
Two Band Model

Data are presented for the thermal and electrical resistivity and thermoelectric power of two samples of Ca (having residual resistance ratios of 10 and 70) between 30 and 300 K. Large deviations from both Matthiessen's rule and the Wiedemann–Franz relationship are observed. The former are tentatively attributed to the presence of two distinct groups of carriers in Ca, and analyzed using the two band model. The latter deviations are interpreted as the effects of band structure. The thermoelectric power of Ca is large. In many respects the transport properties of Ca appear to be similar to those of the transition metals.

Measurements of Thermoelectric Behavior and Microstructure of Carbon Nanotubes/Carbon Fiber-Cement Based Composite

2011 ◽  
Vol 492 ◽  
pp. 242-245 ◽  
Author(s):  
Jun Qing Zuo ◽  
Wu Yao ◽  
Jun Jie Qin ◽  
Hai Yong Cao
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Fiber ◽  
Thermoelectric Power ◽  
Interfacial Adhesion ◽  
Calcium Silicate Hydrate ◽  
Sem Analysis ◽  
Cement Matrix ◽  
Experimental Setup ◽  
Porous Microstructure ◽  
The Absolute

Thermoelectric behavior and microstructure of carbon nanotubes/carbon fiber(CNTs/CF)- cement based composite have been measured in this study. An self-made experimental setup was applied to test the thermoelectric power (TEP) of the composites. The results show that the higher the CNTs content, the less positive the absolute thermoelectric power is. When CNTs addition incresed to 1.0% by weight of cement, the absolute thermoelectric power changed sign from positive to negative. Scanning electron microscopy (SEM) was used to characterize the morphology of CNTs, CF and the structure of Portland cement-CNTs-CF systems. SEM analysis of the results show that good interfacial adhesion between CNTs and cement matrix is seen with CNTs tightly wrapped by Calcium-Silicate-Hydrate (C-S-H). With the incorporation of CNTs/CF in cement based composite, the cement-CNTs-CF system exhibits a porous microstructure.

scholarly journals Particle contamination monitoring in the backscattering light experiment for LISA

2019 ◽  
Vol 5 (1) ◽  
pp. 12-18
Author(s):  
Sibilla Di Pace ◽  
Arwa Dabbech ◽  
Vitalii Khodnevych ◽  
Michel Lintz ◽  
Nicoleta Dinu-Jaeger
Keyword(s):  
Simultaneous Measurement ◽  
Particle Deposition ◽  
Laser Interferometer ◽  
Critical Issue ◽  
Dust Particles ◽  
Experimental Setup ◽  
Space Antenna ◽  
Optical Surfaces ◽  
Laser Interferometer Space Antenna ◽  
Particle Contamination

Abstract In the context of space-based optics, contamination due to particle deposition on the optics is inevitable and constitutes a critical issue. This gets more challenging for the sensitive heterodyne measurements of the Laser Interferometer Space Antenna (LISA), the space-based gravitational wave observatory to be launched in 2034. Therefore, table-top experiments need to be developed for a better understanding of how micrometer to millimeter sized dust particles, present on optical surfaces, affect LISA measurements. In this work, we present an experimental setup for the simultaneous measurement of the coherent backscattering and the monitoring of particles deposition on the optics to be tested. The results of the first measurements are presented and discussed in this article.

scholarly journals Установка по измерению термоэлектрических свойств ультратонких проволок

2019 ◽  
Vol 53 (5) ◽  
pp. 702
Author(s):  
О.Н. Урюпин ◽  
А.А. Шабалдин
Keyword(s):  
Thermoelectric Power ◽  
Thermoelectric Properties ◽  
Electrical Resistance ◽  
Semiconductor Nanowires ◽  
Experimental Setup ◽  
Temperature Range

AbstractAn experimental setup is developed to measure the thermoelectric properties of semiconductor nanowires with diameters of up to 5 nm in dielectric matrices. This setup makes it possible to measure the electrical resistance and thermoelectric power of nanostructured samples in the temperature range of 77–400 K.

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