Zobrazeno 1 - 10
of 61
pro vyhledávání: '"G. J. Edwards"'
Autor:
G J Edwards, Robin Underwood
Publikováno v:
International Journal of Thermophysics. 35:971-984
Acoustic gas thermometry relies on the fundamental relationship between the speed of sound in a monatomic gas and its thermodynamic temperature. The speed of sound is calculated from the resonance frequencies of a cavity whose dimensions or thermal e
Autor:
E T Alger, J. Hughes, Jeremy Kroll, Carlos E. Castro, Richard C. Montesanti, J. L. Reynolds, M F Swisher, D. M. Lord, Janine M. Taylor, E G Dzenitis, K. Segraves, G J Edwards
Publikováno v:
Fusion Science and Technology. 59:78-86
Inertial confinement fusion (ICF) experiments at the National Ignition Facility (NIF) require cryogenic targets at the 1-cm scale to be fabricated, assembled, and metrologized to micron-level tolerances. During assembly of these ICF targets, there ar
Autor:
G J Edwards, M de Podesta
Publikováno v:
International Journal of Thermophysics. 29:1719-1729
We report progress in the development of an apparatus to compare the thermodynamic temperature of a gas with the temperature as determined by the International Temperature Scale of 1990 (ITS-90). The apparatus uses the Rayleigh scattering of light fr
Publikováno v:
Materials Science and Technology. 21:831-840
A miniature test system has been used to investigate the time dependence of the oxide scaling process on representative engineering materials, especially the magnitude of indicated temperatures using a parallel measurement setup of pyrometer and ther
Publikováno v:
Journal de Physique IV (Proceedings). 125:627-630
The Laser Absorption Radiation Thermometer (LART) technique has been developed at the National Physical Laboratory (NPL) to measure temperature independently of target emissivity, surrounding background radiation or gaseous absorption. The technique
Publikováno v:
International Journal of Thermophysics. 26:221-232
A novel comparative method has been developed at the National Physical Laboratory (NPL) to measure the thermal diffusivity of semi-infinite samples without a priori knowledge of the boundary conditions. It is based on photothermal radiometry, and inv
Autor:
Scott D. Setzler, G. J. Edwards, Nils C. Fernelius, K. T. Stevens, M. P. Scripsick, Larry E. Halliburton
Publikováno v:
Journal of Physics: Condensed Matter. 15:3969-3984
Electron paramagnetic resonance and electron–nuclear double resonance have been used to characterize four Ti3+ centres in undoped crystals of potassium titanyl phosphate (KTiOPO4 or KTP). These 3d1 defects (S = 1/2) are produced by ionizing radiati
Publikováno v:
International Journal of Thermophysics. 24:1171-1183
A photothermal radiometry technique is being developed at the NPL with the goal of improving the accuracy of thermal diffusivity measurements. The principle is to perform a laser-induced thermal experiment while simultaneously making accurate measure
Autor:
C. J. Elliott, Mohamed Sadli, G. Failleau, M de Podesta, M. Laurie, D. del Campo, C. Garcia Izquierdo, Sid-Ali Mokdad, G J Edwards, T. Deuzé, J. V. Pearce, G. Sutton, S. Fourrez
Publikováno v:
2013 3rd International Conference on Advancements in Nuclear Instrumentation, Measurement Methods and their Applications (ANIMMA).
In preparation for the new challenges posed by the higher temperature environments which are likely to be encountered in the next generation of nuclear power plants, to maintain the safety and to ensure the long-term reliability of such plants, it is
Publikováno v:
AIP Conference Proceedings.
Acoustic thermometry is the most accurate technique of primary thermometry ever devised. However, resonator based techniques are not practical and are rarely used in practice. Previously we have demonstrated the basic functionality of an acoustic the