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RADIOMETRIC TEMPERATURE MEASUREMENTS OF SHORT DURATION EVENTS.

RADIOMETRIC TEMPERATURE MEASUREMENTS OF SHORT DURATION EVENTS.
Author:
Publisher:
Total Pages: 36
Release: 1961
Genre:
ISBN:

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A 4-color spectroscope using the wavelengths 0.546, 0.577, 0.623, and 0.750 microns was used to determine the surface temperatures of electrically exploded wires and aluminum projectiles of velocity 4,500 m/sec. Several values of initial capacitor energy, pressure, and ambient atmosphere were used with the exploded wires. The projectiles were observed in a normal atmosphere at 710 mm Hg. The temperatures observed for exploded wires for an initial capacitor energy of 0.8 joule in air at 710 mm Hg were: 3825! 25 K for aluminum, 3100! 75 K for copper, and 3700! 25 K for tungsten. For an aluminum projectile in air at 710 mm Hg at a velocity of 4,500 m/sec, the temperature observed was 3250! 50 K. The spectral distribution in all cases was observed to be black body and could be fitted by the Wien radiation law. Calibration was achieved using a tungsten ribbon lamp. Blackbody radiation data from the Planck radiation law are also given using the new value for the second radiation constant, C2 = 14,388 microns K for temperatures from 2000 to 4000 K and wavelengths from 0.500 to 0.800 microns.


Radiometric Temperature Measurements

Radiometric Temperature Measurements
Author:
Publisher: Academic Press
Total Pages: 480
Release: 2009-11-18
Genre: Science
ISBN: 0123785650

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This book describes the practice of radiation thermometry, both at a primary level and for a variety of applications, such as in the materials processing industries and remote sensing. This book is written for those who will a) apply radiation thermometry in industrial practice b) use radiation thermometers for scientific research, c) the radiation thermometry specialist in a national measurement institute d) developers of radiation thermometers who are working to innovate products for instrument manufacturers and e) developers non-contact thermometry methods to address challenging thermometry problems. The author(s) of each chapter were chosen from a group of international scientists who are experts in the field and specialist(s) on the subject matter covered in the chapter. A large number of references are included at the end of each chapter as a resource for those seeking a deeper or more detailed understanding. This book is more than a practice guide. Readers will gain in-depth knowledge in: (1) the proper selection of the type of thermometer; (2) the best practice in using the radiation thermometers; (3) awareness of the error sources and subsequent appropriate procedure to reduce the overall uncertainty; and (4) understanding of the calibration chain and its current limitations. Coverage of all fundamental aspects of the radiometric measurements Coverage of practical applications with details on the instrumentation, calibration, and error sources Authors are from the national labs internationally leading in R&D in temperature measurements Comprehensive coverage with large number of references


Radiometric Temperature Measurements

Radiometric Temperature Measurements
Author:
Publisher: Academic Press
Total Pages: 368
Release: 2009-10-01
Genre: Science
ISBN: 0080920624

Download Radiometric Temperature Measurements Book in PDF, ePub and Kindle

This book describes the theory of radiation thermometry, both at a primary level and for a variety of applications, such as in the materials processing industries and remote sensing. This book is written for those who will apply radiation thermometry in industrial practice; use radiation thermometers for scientific research; the radiation thermometry specialist in a national measurement institute; developers of radiation thermometers who are working to innovate products for instrument manufacturers, and developers of non-contact thermometry methods to address challenging thermometry problems. The authors of each chapter were chosen from a group of international scientists who are experts in the field and specialists on the subject matter covered in the chapter. A large number of references are included at the end of each chapter as a resource for those seeking a deeper or more detailed understanding. This book is more than a practice guide, readers will gain in-depth knowledge in: (1) the proper selection of the type of thermometer; (2) the best practice in using the radiation thermometers; (3) awareness of the error sources and subsequent appropriate procedure to reduce the overall uncertainty; and (4) understanding of the calibration chain and its current limitations. Covers all fundamental aspects of the radiometric measurements Discusses practical applications with details on the instrumentation, calibration, and error sources Authors are from leading national labs working in R&D of temperature measurements


Blackbody Radiation

Blackbody Radiation
Author: Sean M. Stewart
Publisher: CRC Press
Total Pages: 283
Release: 2016-09-19
Genre: Science
ISBN: 1315354888

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Shelving Guide: Electrical Engineering In 1900 the great German theoretical physicist Max Planck formulated a correct mathematical description of blackbody radiation. Today, understanding the behavior of a blackbody is of importance to many fields including thermal and infrared systems engineering, pyrometry, astronomy, meteorology, and illumination. This book gives an account of the development of Planck’s equation together with many of the other functions closely related to it. Particular attention is paid to the computational aspects employed in the evaluation of these functions together with the various aids developed to facilitate such calculations. The book is divided into three sections. Section I – Thermal radiation and the blackbody problem are introduced and discussed. Early developments made by experimentalists and theoreticians are examined as they strove to understand the problem of the blackbody. Section II – The development of Planck’s equation is explained as are the all-important fractional functions of the first and second kinds which result when Planck’s equation is integrated between finite limits. A number of theoretical developments are discussed that stem directly from Planck’s law, as are the various computational matters that arise when numerical evaluation is required. Basic elements of radiometry that tie together and use many of the theoretical and computational ideas developed is also presented. Section III – A comprehensive account of the various computational aids such as tables, nomograms, graphs, and radiation slide rules devised and used by generations of scientists and engineers when working with blackbody radiation are presented as are more recent aids utilizing computers and digital devices for real-time computations. Scientists and engineers working in fields utilizing blackbody sources will find this book to be a valuable guide in understanding many of the computational aspects and nuances associated with Planck’s equation and its other closely related functions. With over 700 references, it provides an excellent research resource.