RSI: Thermometry; Thermal Diffusivity; Acoustic; Photothermal and Photoacoustic http://scitation.aip.org/ RSI: Thermometry; Thermal Diffusivity; Acoustic; Photothermal and Photoacoustic New methodology for simultaneous volumetric and calorimetric measurements: Direct determination of alpha and C for liquids under pressure http://link.aip.org/link/?RSI/80/124902/1&agg=rss L. M. Casas, F. Plantier, and D. Bessieres<br/> A new batch cell has been developed to measure simultaneously both isobaric thermal expansion and isobaric heat capacity from calorimetric measurements. The isobaric thermal expansion is directly proportional to the linear displacement of an inner flexible below and the heat capacity is calculated f ... [Rev. Sci. Instrum. 80, 124902 (2009)] published Tue Dec 15, 2009. Improvement of energy efficiency via spectrum optimization of excitation sequence for multichannel simultaneously triggered airborne sonar system http://link.aip.org/link/?RSI/80/124903/1&agg=rss Qing-Hao Meng, Zhen-Jing Yao, and Han-Yang Peng<br/> Both the energy efficiency and correlation characteristics are important in airborne sonar systems to realize multichannel ultrasonic transducers working together. High energy efficiency can increase echo energy and measurement range, and sharp autocorrelation and flat cross correlation can help eli ... [Rev. Sci. Instrum. 80, 124903 (2009)] published Tue Dec 15, 2009. Analysis of thermoreflectance signals and characterization of thermal conductivity of metal thin films http://link.aip.org/link/?RSI/80/124901/1&agg=rss Syugo Miyake, Takashi Kita, Aya Miyake, Ken-ichi Ikeda, and Hiroyuki Takamatsu<br/> The temperature response of the thermal conductivity (lambda) of metal thin films has been investigated by the thermoreflectance (TR) method. The phase lag of the TR signals depends on the thermal diffusivity when the heating area is small, while on the thermal effusivity when the heating area is la ... [Rev. Sci. Instrum. 80, 124901 (2009)] published Mon Dec 7, 2009. Analog-to-digital converters nonlinear errors correction in thermal diagnostics for the laser interferometer space antenna mission http://link.aip.org/link/?RSI/80/114901/1&agg=rss J. Sanjuan, A. Lobo, and J. Ramos-Castro<br/> Low-noise temperature measurements at frequencies in the millihertz range are required in the laser interferometer space antenna (LISA) and LISA PathFinder missions. The required temperature stability for LISA is around 10 [mu]K Hz at frequencies down to 0.1 mHz. In this paper we focus on the ident ... [Rev. Sci. Instrum. 80, 114901 (2009)] published Wed Nov 11, 2009. True temperature measurement on metallic surfaces using a two-color pyroreflectometer method http://link.aip.org/link/?RSI/80/094903/1&agg=rss D. Hernandez, A. Netchaieff, and A. Stein<br/> In the most common case of optical pyrometry, the major obstacle in determining the true temperature is the knowledge of the thermo-optical properties for in situ conditions. We present experimental results obtained with a method able to determine the true temperature of metallic surfaces above 500 ... [Rev. Sci. Instrum. 80, 094903 (2009)] published Tue Sep 15, 2009. Magnetoresistance of TVO temperature sensor at T<1 K http://link.aip.org/link/?RSI/80/094902/1&agg=rss Yu. P. Filippov, G. G. Ihas, and V. V. Vainberg<br/> A magnetoresistance (MR) of the well known TVO resistor temperature sensors has been studied at ultralow temperatures from [approximate]0.8 K down to [approximate]0.1 K under strong magnetic fields up to 8 T. A crossover from positive to negative MR with lowering temperature is found at weak magneti ... [Rev. Sci. Instrum. 80, 094902 (2009)] published Tue Sep 1, 2009. A frequency-domain thermoreflectance method for the characterization of thermal properties http://link.aip.org/link/?RSI/80/094901/1&agg=rss Aaron J. Schmidt, Ramez Cheaito, and Matteo Chiesa<br/> A frequency-domain thermoreflectance method for measuring the thermal properties of homogenous materials and submicron thin films is described. The method can simultaneously determine the thermal conductivity and heat capacity of a sample, provided the thermal diffusivity is >~3 x 10 m/s, and can a ... [Rev. Sci. Instrum. 80, 094901 (2009)] published Tue Sep 1, 2009. Systematic error of diode thermometer http://link.aip.org/link/?RSI/80/084901/1&agg=rss Predrag S. Iskrenovic<br/> Semiconductor diodes are often used for measuring temperatures. The forward voltage across a diode decreases, approximately linearly, with the increase in temperature. The applied method is mainly the simplest one. A constant direct current flows through the diode, and voltage is measured at diode t ... [Rev. Sci. Instrum. 80, 084901 (2009)] published Mon Aug 24, 2009. Thermal diffusivity measurements of thin plates and filaments using lock-in thermography http://link.aip.org/link/?RSI/80/074904/1&agg=rss Arantza Mendioroz, Raquel Fuente-Dacal, Estibaliz Apinaniz, and Agustin Salazar<br/> Photothermal radiometry has been widely used to measure the thermal diffusivity of bulk materials. In the case of thin plates and filaments, a one-dimensional heat propagation model including heat losses has been developed, predicting that the thermal diffusivity can be obtained by recording both th ... [Rev. Sci. Instrum. 80, 074904 (2009)] published Thu Jul 23, 2009. Application of network identification by deconvolution method to the thermal analysis of the pump-probe transient thermoreflectance signal http://link.aip.org/link/?RSI/80/074903/1&agg=rss Y. Ezzahri and A. Shakouri<br/> The paper discusses the possibility to apply network identification by deconvolution (NID) method to the analysis of the thermal transient behavior due to a laser delta pulse excitation in a pump-probe transient thermoreflectance experiment. NID is a method based on linear RC network theory using Fo ... [Rev. Sci. Instrum. 80, 074903 (2009)] published Mon Jul 20, 2009. Photothermal technique using individual cantilevers for quality monitoring in thin film devices http://link.aip.org/link/?RSI/80/074902/1&agg=rss Tamihiro Gotoh<br/> An innovative photothermal technique has been developed to obtain optical absorption spectra of thin film devices. This technique is based on the bending effect induced by thermal expansion of a cantilever. The thin and transparent cantilever contacts a sample and when the sample is heated by photoe ... [Rev. Sci. Instrum. 80, 074902 (2009)] published Wed Jul 15, 2009. Characterization of condenser microphones under different environmental conditions for accurate speed of sound measurements with acoustic resonators http://link.aip.org/link/?RSI/80/074901/1&agg=rss Cecile Guianvarc'h, Roberto M. Gavioso, Giuliana Benedetto, Laurent Pitre, and Michel Bruneau<br/> Condenser microphones are more commonly used and have been extensively modeled and characterized in air at ambient temperature and static pressure. However, several applications of interest for metrology and physical acoustics require to use these transducers in significantly different environmental ... [Rev. Sci. Instrum. 80, 074901 (2009)] published Mon Jul 6, 2009. Heat transfer analysis for peripheral blood flow measurement system http://link.aip.org/link/?RSI/80/064902/1&agg=rss Koji Nagata, Hideharu Hattori, Nobuhiko Sato, Yukiko Ichige, and Masashi Kiguchi<br/> Some disorders such as circulatory disease and metabolic abnormality cause many problems to peripheral blood flow condition. Therefore, frequent measurement of the blood flow condition is bound to contribute to precaution against those disorders and to control of conditions of the diseases. We propo ... [Rev. Sci. Instrum. 80, 064902 (2009)] published Tue Jun 30, 2009. Simultaneous measurements of the specific heat and thermal conductivity of suspended thin samples by transient electrothermal method http://link.aip.org/link/?RSI/80/064901/1&agg=rss Bo Feng, Weigang Ma, Zhixin Li, and Xing Zhang<br/> The electrothermal technique is developed to simultaneously measure the specific heat and thermal conductivity of individual thin samples suspended across two heat sinks, resorting to pulsed direct currents with or without a dc offset. The temperature evolution due to Joule self-heating is recorded ... [Rev. Sci. Instrum. 80, 064901 (2009)] published Wed Jun 10, 2009. High accuracy, self-calibrating photopyroelectric device for the absolute determination of thermal conductivity and thermal effusivity of liquids http://link.aip.org/link/?RSI/80/054904/1&agg=rss Preethy Chirukandath Menon, Ravindran Nair Rajesh, and Christ Glorieux<br/> An improved photopyroelectric approach to simultaneously determine the thermal conductivity and thermal effusivity of minute quantities of liquids, which is based on a combined scan of the modulation frequency and the piston-sensor distance, is presented. A thorough sensitivity analysis and statisti ... [Rev. Sci. Instrum. 80, 054904 (2009)] published Fri May 29, 2009. Coupled analysis of high and low frequency resonant ultrasound spectroscopy: Application to the detection of defects in ceramic balls http://link.aip.org/link/?RSI/80/054903/1&agg=rss Francois Deneuville, Marc Duquennoy, Mohammadi Ouaftouh, Frederic Jenot, Mohamed Ourak et al.<br/> A coupled analysis of high and low frequency resonant ultrasound spectroscopy of spheroidal modes is presented in this paper. Experimentally, by using an ultrasonic probe for the excitation (piezoelectric transducer) and a heterodyne optic probe for the receiver (interferometer), it was possible to ... [Rev. Sci. Instrum. 80, 054903 (2009)] published Thu May 28, 2009. Quantification of unsteady heat transfer and phase changing process inside small icing water droplets http://link.aip.org/link/?RSI/80/054902/1&agg=rss Zheyan Jin and Hui Hu<br/> We report progress made in our recent effort to develop and implement a novel, lifetime-based molecular tagging thermometry (MTT) technique to quantify unsteady heat transfer and phase changing process inside small icing water droplets pertinent to wind turbine icing phenomena. The lifetime-based MT ... [Rev. Sci. Instrum. 80, 054902 (2009)] published Thu May 21, 2009. Photoacoustic technique to measure beam profile of pulsed laser systems http://link.aip.org/link/?RSI/80/054901/1&agg=rss Srivalleesha Mallidi and Stanislav Emelianov<br/> The beam profiles of pulsed lasers are currently measured using either complementary metal oxide semiconductor (CMOS) or charge coupled device (CCD) cameras. Despite providing high-resolution beam profiles, these devices cannot work with high power lasers. If additional optical attenuators are used, ... [Rev. Sci. Instrum. 80, 054901 (2009)] published Fri May 8, 2009. Calibration of the thermoelastic constants for quantitative thermoelastic stress analysis on composites http://link.aip.org/link/?RSI/80/034904/1&agg=rss A. Salerno, A. Costa, and G. Fantoni<br/> The application of thermoelastic stress analysis in composite materials is particularly complicated because of the anisotropy of the material, that determines the thermoelastic constant to be dependent on the direction of the fibers. A further difficulty depends on the constructive stratification of ... [Rev. Sci. Instrum. 80, 034904 (2009)] published Mon Mar 30, 2009. Thermal-wave radar: A novel subsurface imaging modality with extended depth-resolution dynamic range http://link.aip.org/link/?RSI/80/034902/1&agg=rss Nima Tabatabaei and Andreas Mandelis<br/> Combining the ideas behind linear frequency modulated continuous wave radars and frequency domain photothermal radiometry (PTR), a novel PTR method is introduced. Analytical solutions to the heat diffusion problem for both opaque and transparent solids are provided. Simulations and experimental resu ... [Rev. Sci. Instrum. 80, 034902 (2009)] published Wed Mar 18, 2009. Two omega method for active thermocouple microscopy http://link.aip.org/link/?RSI/80/034901/1&agg=rss Laurent Thiery, Eric Gavignet, and Bernard Cretin<br/> We present a contribution to a new mode of scanning thermal microscopy (SThM) based on the use of thermoelectric junction operating in ac active mode. This is the first alternative to 3omega operating mode of a resistive SThM probe for measuring thermophysical parameters of materials at micro- and n ... [Rev. Sci. Instrum. 80, 034901 (2009)] published Wed Mar 11, 2009.