Fiber-Optic Thermometer Using Thermal Radiation and Thermally Excited Luminescence

2006 ◽  
Author(s):  
T. Katsumata ◽  
K. Morita ◽  
H. Aizawa ◽  
S. Komuro ◽  
T. Morikawa
Keyword(s):  
Thermal Radiation ◽  
Fiber Optic ◽  
Excited Luminescence

Fiber-optic thermometry using thermal radiation from Tm end doped SiO2 fiber sensor

2014 ◽  
Vol 85 (4) ◽  
pp. 044902 ◽  
Author(s):  
Kentaro Morita ◽  
Toru Katsumata ◽  
Shuji Komuro ◽  
Hiroaki Aizawa
Keyword(s):  
Thermal Radiation ◽  
Fiber Optic ◽  
Fiber Sensor

Fiber-Optic Thermometer Based on Thermal Radiation from Holmium Doped SiO2

2005 ◽  
Vol 3 (3) ◽  
pp. 248-251 ◽  
Author(s):  
T. Katsumata ◽  
T. Iguchi ◽  
K. Morita ◽  
H. Aizawa ◽  
S. Komuro ◽  
...  
Keyword(s):  
Thermal Radiation ◽  
Fiber Optic

Fiber-optic thermometer based on thermal radiation from rare-earth doped SiO 2

2005 ◽  
Author(s):  
T. Katsumata ◽  
T. Iguchi ◽  
H. Aizawa ◽  
S. Komuro ◽  
T. Morikawa
Keyword(s):  
Rare Earth ◽  
Thermal Radiation ◽  
Fiber Optic ◽  
Rare Earth Doped

Photoluminescence and thermal radiation from Eu and Al doped SiO2 for fiber-optic thermometer application

2014 ◽  
Vol 154 ◽  
pp. 549-552 ◽  
Author(s):  
Toru Katsumata ◽  
Shuji Komuro ◽  
Hiroaki Aizawa
Keyword(s):  
Thermal Radiation ◽  
Fiber Optic

Fiber-optic thermometer application of thermal radiation from rare-earth end-doped SiO2 fiber

2014 ◽  
Vol 85 (8) ◽  
pp. 084903 ◽  
Author(s):  
Toru Katsumata ◽  
Kentaro Morita ◽  
Shuji Komuro ◽  
Hiroaki Aizawa
Keyword(s):  
Rare Earth ◽  
Thermal Radiation ◽  
Fiber Optic

Imaging and diffraction modes in Scanning Transmission Electron Microscopy

1986 ◽  
Vol 44 ◽  
pp. 684-687
Author(s):  
J. M. Cowley ◽  
R. Glaisher ◽  
J. A. Lin ◽  
H.-J. Ou
Keyword(s):  
Scanning Transmission Electron Microscopy ◽  
High Efficiency ◽  
Fiber Optic ◽  
Image Intensifier ◽  
Detector System ◽  
Detector Plane ◽  
Secondary Electrons ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
Special Detector

Some of the most important applications of STEM depend on the variety of imaging and diffraction made possible by the versatility of the detector system and the serial nature, of the image acquisition. A special detector system, previously described, has been added to our STEM instrument to allow us to take full advantage of this versatility. In this, the diffraction pattern in the detector plane may be formed on either of two phosphor screens, one with P47 (very fast) phosphor and the other with P20 (high efficiency) phosphor. The light from the phosphor is conveyed through a fiber-optic rod to an image intensifier and TV system and may be photographed, recorded on videotape, or stored digitally on a frame store. The P47 screen has a hole through it to allow electrons to enter a Gatan EELS spectrometer. Recently a modified SEM detector has been added so that high resolution (10Å) imaging with secondary electrons may be used in conjunction with other modes.

Synthesis, performance and growth mechanism of silver nanoparticle coated SERS fiber probe

2019 ◽  
Vol 107 (3) ◽  
pp. 305
Author(s):  
Mengmei Geng ◽  
Yuting Long ◽  
Tongqing Liu ◽  
Zijuan Du ◽  
Hong Li ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Absorption Spectrum ◽  
Reaction Time ◽  
Growth Mechanism ◽  
Fiber Optic ◽  
Fiber Optic Probe ◽  
Visible Absorption ◽  
Fiber Probe ◽  
Surface Enhanced Raman ◽  
Optic Probe

Surface-enhanced Raman Scattering (SERS) fiber probe provides abundant interaction area between light and materials, permits detection within limited space and is especially useful for remote or in situ detection. A silver decorated SERS fiber optic probe was prepared by hydrothermal method. This method manages to accomplish the growth of silver nanoparticles and its adherence on fiber optic tip within one step, simplifying the synthetic procedure. The effects of reaction time on phase composition, surface plasmon resonance property and morphology were investigated by X-ray diffraction analysis (XRD), ultraviolet-visible absorption spectrum (UV-VIS absorption spectrum) and scanning electron microscope (SEM). The results showed that when reaction time is prolonged from 4–8 hours at 180 °C, crystals size and size distribution of silver nanoparticles increase. Furthermore, the morphology, crystal size and distribution density of silver nanoparticles evolve along with reaction time. A growth mechanism based on two factors, equilibrium between nucleation and growth, and the existence of PVP, is hypothesized. The SERS fiber probe can detect rhodamin 6G (R6G) at the concentration of 10−6 M. This SERS fiber probe exhibits promising potential in organic dye and pesticide residue detection.

Characterizing the convective heat exchange with plastic shading nets under natural arid conditions

2019 ◽  
pp. 11-20
Author(s):  
Ahmed M Abdel-Ghanya ◽  
Ibrahim M Al-Helal
Keyword(s):  
Wind Speed ◽  
Thermal Radiation ◽  
Convective Heat ◽  
Convective Heat Transfer Coefficient ◽  
Convective Heat Exchange ◽  
Radiative Properties ◽  
Wooden Frame ◽  
Arid Conditions ◽  
Air Temperatures ◽  
Radiation Fluxes

Plastic nets are extensively used for shading purposes in arid regions such as in the Arabian Peninsula. Quantifying the convection exchange with shading net and understanding the mechanisms (free, mixed and forced) of convection are essential for analyzing energy exchange with shading nets. Unlike solar and thermal radiation, the convective energy, convective heat transfer coefficient and the nature of convection have never been theoretically estimated or experimentally measured for plastic nets under arid conditions. In this study, the convected heat exchanges with different plastic nets were quantified based on an energy balance applied to the nets under outdoor natural conditions. Therefore, each net was tacked onto a wooden frame, fixed horizontally at 1.5-m height over the floor. The downward and upward solar and thermal radiation fluxes were measured below and above each net on sunny days; also the wind speed over the net, and the net and air temperatures were measured, simultaneously. Nets with different porosities, colors and texture structures were used for the study. The short and long wave’s radiative properties of the nets were pre-determined in previous studies to be used. Re and Gr numbers were determined and used to characterize the convection mechanism over each net. The results showed that forced and mixed convection are the dominant modes existing over the nets during most of the day and night times. The nature of convection over nets depends mainly on the wind speed, net-air temperature difference and texture shape of the net rather than its color and its porosity.

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