Thermal radiation from laser heated silicon and pyrometric temperature measurements

1984 ◽  
Vol 45 (2) ◽  
pp. 159-161 ◽  
Author(s):  
M. Kemmler ◽  
G. Wartmann ◽  
D. von der Linde
Keyword(s):  
Thermal Radiation ◽  
Temperature Measurements ◽  
Laser Heated

Solar and Thermal Radiation Errors on Upper-Air Radiosonde Temperature Measurements

2013 ◽  
Vol 30 (10) ◽  
pp. 2382-2393 ◽  
Author(s):  
R. Philipona ◽  
A. Kräuchi ◽  
G. Romanens ◽  
G. Levrat ◽  
P. Ruppert ◽  
...  
Keyword(s):  
Solar Radiation ◽  
Thermal Radiation ◽  
Air Temperature ◽  
Weather Prediction ◽  
Lower Troposphere ◽  
Longwave Radiation ◽  
Atmospheric Temperature ◽  
Radiative Heating ◽  
Temperature Measurements ◽  
High Quality

Abstract Atmospheric temperature and humidity profiles are important for weather prediction, but climate change has increased the interest in upper-air observations asking for very high-quality reference measurements. This paper discusses an experimental approach to determine the radiation-induced error on radiosonde air temperature measurements. On the one hand, solar shortwave and thermal longwave radiation profiles were accurately measured during radiosonde ascents from the surface to 35-km altitude. On the other hand, air temperature was measured with several thermocouples on the same flight, simultaneously under sun-shaded and unshaded conditions. The radiation experiments reveal that thermal radiation errors on the very thin thermocouple of the Meteolabor SRS-C34 radiosonde are similar during night- and daytime. They produce a radiative cooling in the lower troposphere and the upper stratosphere, but a radiative heating in the upper troposphere and lower stratosphere. Air temperature experiments with several thermocouples, however, show that solar radiation produces a radiative heating of about +0.2°C near the surface, which linearly increases to about +1°C at 32 km (~10 hPa). The new solar radiation error profile was then applied to SRS-C34 measurements made during the Eighth WMO Intercomparison of High Quality Radiosonde Systems, held in Yangjiang, China, in July 2010. The effects of thermal and solar radiation errors are finally shown in contrast to the 10 other internationally used radiosonde systems, which were flown during this international campaign.

Notizen: Temperature Measurements o f Laser Heated Cavities

1986 ◽  
Vol 41 (5) ◽  
pp. 767-768 ◽  
Author(s):  
P. Herrmann ◽  
R. Pakula ◽  
I. B. Földes ◽  
R. Sigel ◽  
G. D. Tsakiris ◽  
...  
Keyword(s):  
Theoretical Work ◽  
Temperature Measurements ◽  
X Ray ◽  
Brightness Temperatures ◽  
Laser Heated

Absolute soft x-ray measurements on laser heated gold cavities (0.25-1 mm diam.) yield brightness temperatures > 106 K. Comparison with theoretical work shows that the temperature in the cavity is determined by the diffusive loss of radiation into the wall.

Temperature measurements using multicolor pyrometry in thermal radiation heating environments

2014 ◽  
Vol 85 (4) ◽  
pp. 044901 ◽  
Author(s):  
Tairan Fu ◽  
Jiangfan Liu ◽  
Minghao Duan ◽  
Anzhou Zong
Keyword(s):  
Thermal Radiation ◽  
Temperature Measurements ◽  
Radiation Heating

scholarly journals Thermal radiation of laser heated niobium clusters Nb N+, 8 ⩽ N ⩽ 22

2014 ◽  
Vol 141 (2) ◽  
pp. 024302 ◽  
Author(s):  
Klavs Hansen ◽  
Yejun Li ◽  
Vladimir Kaydashev ◽  
Ewald Janssens
Keyword(s):  
Thermal Radiation ◽  
Laser Heated

scholarly journals Quantifying the effect of thermal heat radiation emitted by the walls of a climatic chamber on temperature measurements

2019 ◽  
Author(s):  
Jacques-Olivier. Favreau ◽  
Sarah. Bories ◽  
Marzougui. Salem ◽  
Eric. Georgin
Keyword(s):  
Thermal Radiation ◽  
Air Temperature ◽  
Radiation Effect ◽  
Surface Condition ◽  
Surface States ◽  
Temperature Measurements ◽  
Heat Radiation ◽  
Climatic Chamber ◽  
Air Velocity ◽  
Black Paint

The study consists in quantifying the effect of the thermal radiation of the climatic chamber walls on air temperature measurements for contact thermometry. Air temperature measurements are affected by surface interactions with the environment, such as those of the thermometer and walls (surface condition, emissivity and air velocity). The walls of the enclosure are generally made of stainless steel, a potentially radiating material. To characterize the effect of the walls, we have varied environmental conditions such as the emissivity of the walls of the chamber and the sensors, the surface of the sensors, temperature and illumination. These different configurations allow us to deduce their impacts on the temperature measurements. To quantify this effect we simulated different configurations to isolate the radiation effect. Two surface states are tested: low emissivity metal surface and painted surface with matte black paint of high emissivity. This study highlights the effect of the walls on the air temperature measurements in the center of the climatic chamber. The experimental results were also subject to a theoretical verification using the equation of the standard ISO 7726 [1]. The quantification of the effect of radiation from the walls of the climate chamber on temperature measurements becomes significant from 100 °C. Quantification of thermal radiation is 0.4 °C at 100 °C and 0.8 °C at 150 °C.

Analysis of thermal radiation from laser-heated nanoparticles formed by laser-induced decomposition of ferrocene

2005 ◽  
Vol 81 (4) ◽  
pp. 827-833 ◽  
Author(s):  
L. Landström ◽  
K. Elihn ◽  
M. Boman ◽  
C.G. Granqvist ◽  
P. Heszler
Keyword(s):  
Thermal Radiation ◽  
Induced Decomposition ◽  
Laser Heated
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