Development of a fast fiber-optic two-color pyrometer for the temperature measurement of surfaces with varying emissivities

Müller, Bernhard; Renz, Ulrich

doi:10.1063/1.1384448

Cited by 146 publications

(79 citation statements)

References 12 publications

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“…Only a small number of layers are shown; in reality, foils contain hundreds of layers. A two-color pyrometer, similar to one described in [50], was used to compare reaction temperatures as a function of time for the three chemistries. During these temperature measurements, samples were held vertically with the top and bottom edges clamped between glass slides to prevent the foils from folding during the reaction while minimizing heat-sinking effects.…”

Section: Reaction Heats Temperatures and Productsmentioning

confidence: 99%

Using magnesium to maximize heat generated by reactive Al/Zr nanolaminates

Overdeep

Livi

Allen

et al. 2015

Combustion and Flame

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a b s t r a c tIn this study, we explore the effect of magnesium content on the ability of reactive nanocomposite foils to generate heat, by comparing three chemistries: Al:Zr, Al-8Mg:Zr, and Al-38Mg:Zr. These correspond to foils with alternating aluminum and zirconium layers where the Al is either pure, an 8 at.%Mg alloy, or a 38 at.%Mg alloy, respectively. Measurements performed in a specially designed bomb calorimeter show that Al-8Mg:Zr foils perform the best, generating the greatest gravimetric heat in air, oxygen, and nitrogen environments. Both Mg-containing foils release a visible plume of particles and vapor upon reacting, which was recorded with a high speed camera. This ejected mass includes Mg vapor and particles of all three metals. Both the vapor and particles oxidize rapidly in air, resulting in single metal-oxide particles. The reacted foils, particularly the Al-8Mg:Zr samples, contain voids and higher levels of oxygen and nitrogen throughout their thicknesses than reacted Al:Zr foils. To explain the higher heats of reaction for the Al-8Mg:Zr foils, we suggest that the out-diffusion and evaporation of Mg generates a high concentration of vacancies that enhance oxygen and nitrogen diffusion throughout the foil, thereby increasing the degree of oxidation and nitridation.

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Section: Reaction Heats Temperatures and Productsmentioning

confidence: 99%

Using magnesium to maximize heat generated by reactive Al/Zr nanolaminates

Overdeep

Livi

Allen

et al. 2015

Combustion and Flame

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“…Monochromatic pyrometers were also not considered here because calculations showed that slight changes of the surface properties can result in large errors [5], and also signal attenuation or unknown object sizes result in measurement errors.…”

Section: Pyrometer Conceptmentioning

confidence: 99%

A Fast Fiber-optic Two-color Pyrometer for Temperature Measurements of Metallic Surfaces with Varying Emissivities

Müller¹,

Renz²

2003

AIP Conference Proceedings

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A two-color pyrometer has been developed to measure the temperature of metallic surfaces with unknown or varying emissivities in manufacturing processes, e. g. the chip temperature during turning. The absolute temperature uncertainty has been analyzed for metallic surfaces with various surface properties for the pyrometer wavelengths 1.7 and 2.0 µm. The influences of digitization and noise on the temperature resolution have been determined. Fast amplifiers and data acquisition allow a maximum time resolution of 2 µs. To enhance the pyrometer sensitivity a low-loss optical system, variable-gain low-noise amplifiers, and Peltier-element cooled InGaAs photodiodes have been used. The pyrometer is capable of measuring temperatures of metallic surfaces with emissivities as low as 0.2 down to ~300 °C. Quartz-fibers with small diameters enable locally resolved measurements at positions with limited optical access and small sizes. Test measurements at different metallic surfaces have been performed to verify the temperature accuracy.

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“…Such non-streaked two-color pyrometers usually show better accuracy than their one-color counterparts [24]. As such, a two-color SOP is desired.…”

Section: Sample Temperature Diagnosticsmentioning

confidence: 99%

Feasibility study of measuring the temperature and pressure of warm dense matter.

Rambo¹,

Schwarz²

2008

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We have investigated the feasibility of making accurate measurements of the temperature and pressure of solid-density samples rapidly heated by the Z-Petawatt laser to warm dense matter (WDM) conditions, with temperatures approaching 100eV. The study focused specifically on the heating caused by laser generated proton beams. Based on an extensive literature search and numerical investigations, a WDM experiment is proposed which will accurately measure temperature and pressure based on optical emission from the surface and sample expansion velocity. 4 5

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Development of a fast fiber-optic two-color pyrometer for the temperature measurement of surfaces with varying emissivities

Cited by 146 publications

References 12 publications

Using magnesium to maximize heat generated by reactive Al/Zr nanolaminates

Using magnesium to maximize heat generated by reactive Al/Zr nanolaminates

A Fast Fiber-optic Two-color Pyrometer for Temperature Measurements of Metallic Surfaces with Varying Emissivities

Feasibility study of measuring the temperature and pressure of warm dense matter.

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