2 edition of Computer program for pulsed thermocouples with corrections for radiation effects found in the catalog.
Computer program for pulsed thermocouples with corrections for radiation effects
Herbert A. Will
by National Aeronautics and Space Administration, Scientific and Technical Information Branch, For sale by the National Technical Information Service] in Washington, D.C, [Springfield, Va
Written in English
|Statement||Herbert A. Will.|
|Series||NASA technical paper -- 1895.|
|Contributions||Lewis Research Center., United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch.|
|The Physical Object|
|Pagination||39 p. :|
|Number of Pages||39|
Gas detectors based on a 3He proportional counter play an important role in monitoring the ambient dose equivalent in nuclear reactors and particle accelerators, and the time resolution of such gas detectors is directly related to the accuracy of dose equivalent values when gas detectors are used in pulsed neutron fields. In this article, the dead-time of a proportional Cited by: 1. Humans can perceive a buzzing or clicking sound in the back of their heads at exposure to power densities as low as mW/cm² of pulsed microwave radiation ( MHz), depending on the pulse repetition frequency and the peak power density (around mW/cm²).
Thermocouples are often used for temperature measurements in heat exchangers. However if the radiation losses from a thermocouple in a high temperature gas flow to colder surroundings are ignored significant errors can occur. Even at moderate temperature differences, these can be significant. Prediction of radiation losses from theory can be problematic, . Thermocouples and Radiation Shields Back to Freeze Page The objective of the radiation shields is to reduce the effects of radiation heat exchange between the thermocouple and the surrounding environment. Radiation can have a significant effect on the temperatures of objects (tomato plant leaves, fruit, soil, etc.).
document for laboratories undertaking the calibration of thermocouples. It is valid primarily for thermocouple types standardised in accordance with temperature-emf reference tables produced at NIST  and adopted by the IEC and later by CEN as EN . It covers the temperature range °C to + °C, theFile Size: KB. 7 Evidence for health effects 8 Non-uniform exposures to radiation 9–10 Risks and stochastic effects in perspective 11 Radiation protection programmes 12–14 Deterministic effects of whole body exposures 15–18 Deterministic effects of partial body exposures 19–21 Medical surveillance, staff and facilities 22 Routine medical counselling.
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Computer program for pulsed thermocouples with corrections for radiation effects. Washington, D.C.: National Aeronautics and Space Administration, Scientific and Technical Information Branch ; [Springfield, Va.: For sale by the National Technical Information Service], (OCoLC) Material Type.
Radiation corrections of temperature measured by bare thermocouples are not easy to perform. Indeed, the quantification of radiation errors depends on various parameters such as thermocouple bead properties (emissivity), fire and gas properties (temperature and emissivity), convection heat transfer in the vicinity of the bead , .Cited by: The application of pulsed radiation fields for research, security screening and medical examinations has increased remarkably in the last years.
Testing of active personal and area dosemeters for the operation in pulsed radiation fields is a necessity to judge the suitability of the dosemeter. Up to now, radiation protectionFile Size: KB.
Radiation Effects on Electronics Simple Concepts and New Challenges Kenneth A. LaBel @ Co-Manager, NASA Electronic Parts and Packaging (NEPP) Program Group Leader, Radiation Effects and Analysis Group (REAG), NASA/GSFC Project Technologist, Living With a Star (LWS) Space Environment Testbeds (SET).
The use of fine-wire thermocouples for flame temperature measurements has been extensively discussed . Unfortunately, the use of thermocouples is subject to systematic errors arising from heat losses due to conduction and radiation [4,]. For fine-wire thermocouples, conduction losses are negligible and radiation correctionsCited by: 2.
INT. COMM. HEAT MASS TRANSFER Vol. 17, pp.ergamon Press plc /90 $ + Printed in the United States RADIATION ERRORS IN TEMPERATURE MEASUREMENTS WITH THERMOCOUPLES IN A CYLINDRICAL COMBUSTOR J.A.
Carvalho, Jr. and W.F.N. dos Santos Instituto de Pesquisas Espaciais Laboratorio Associado de Cited by: 8. In this regard, Brohez et al. (Brohez et al., ) proposed an experimental method to correct for radiation, but only with bare bead thermocouples by using a probe consisting of two bare bead.
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. In particular, two thermocouples with unequal diameters of 1/16 inch and 1/8 inch are used to correct the radiation bias 13 for the hot gas temperature measurement in the.
Report presenting an experimental determination of radiation and recovery corrections and time constraints for several designs of shielded and unshielded thermocouple probes using chromel-alumel wire. Radiation and time constant data were obtained for Mach numbers from to and a range of static pressures and temperatures.
Tables and graphs Cited by: This book was originally prepared to serve as a reference book on radiation effects in electronics for electronics engineers at the General Electric Re-Entry Systems Department, who had been confronted with the task of designing space radiation hard electronic equipment.
Advanced pulsed-power and radiation-effects facilities allow for cutting-edge research and vital national security applications: The Z machine uses the high magnetic fields associated with high electrical currents to produce high temperatures, high pressures, and powerful soft X-rays for research in high density physics.
Effects in Waveguide Exposure The effects of pulsed microwave radiation on the growth of the E. coli strains were explored. Experiments were performed under controlled temperature (37° ± °C) in a waveguide exposure system using GHz pulsed radiation which had a pulse width of 1 usec and a pulse repetition rate of 1 KHz.
Appendix A: Thermocouple Radiation Correction In a high-temperature environment, such as the exit of the hot-air duct in the current counterflow arrangement, one major source of uncertainty in the measurement of ignition temperature is the correction for radiation, closely followed by the assurance that simplifying assumptions made.
There is a growing need to understand and combat potential radiation damage problems in semiconductor devices and circuits. Assessing the billion-dollar market for detection equipment in the context of medical imaging using ionizing radiation, Electronics for Radiation Detection presents valuable information that will help integrated circuit (IC) designers and other Price: $ An electromagnetic pulse (EMP), also sometimes called a transient electromagnetic disturbance, is a short burst of electromagnetic energy.
Such a pulse's origin may be a natural occurrence or man-made and can occur as a radiated, electric, or magnetic field or a conducted electric current, depending on the source.
EMP interference is generally disruptive or damaging to electronic. EPA/ March Index Of Publications On Biological Effects Of Electromagnetic Radiation ( GHz) Edited by James B. Kinn Bioengineering Branch, EBD Health Effects Research Laboratory U.S. Environmental Protection Agency Research Triangle Park, NC and Elliot Postow Naval Medical R & D Command National Naval Medical.
The reliability of thermocouples in microwave ceramics processing. Aguilar J(1), Valdez Z, Ortiz U. Author information: (1)Universidad Autónoma de Nuevo León, Facultad de Ingeniería Mecánica y Eléctrica, Apartado Postal F, Cd.
Universitaria, San Cited by: 3. Φ e (λ,t) represents the flux per unit wavelength at wavelength λ and time t; Φ e (t) represents the total flux (for all wavelengths), at time t. Φ e (λ) is the spectral distribution of radiant energy, while Q e represents the total energy for all wavelengths.
For Φ e (t) in Watts, Q e will be in joules. Δt, is the time interval for the integration that encompasses the entire pulse. require corrections due to radiative and conductive heat losses.1−6 For ﬁne-wire thermocouples, conduction losses are negli-gible, and thus it is the radiation correction that presents the most diﬃcult challenge to accurate measurement of gas temperatures.
Radiation varies with. EFFECTS OF RADIATION ON SEMICONDUCTOR MATERIALS AND DEVICES. [D. K. Wilson] on *FREE* shipping on qualifying offers.Effects of thermocouples within the computational control volume Zahid Hafeez Khokhar Home Address P/, Str West Canal Road, Faisalabad, Pakistan Email1: [email protected] Corresponding email2: [email protected] ABSTRACT Side injection formation is a very common geometry used in many areas: from oil and gas.Radiation can damage electronic circuits and it can cause electronics to malfunction.
Radiation can degrade the semiconductor materials used in electronics, reducing the useful lifetime of the electronics. For instance, solar panels used on spacecraft gradually become less efficient after prolonged radiation exposure in space.