Abstract
The thermistors are indispensable devices in experimental arrangements for electrical calibration of graphite calorimeters. The present experiments determine the two basic thermal constants in graphite – the thermal time constant, \( \tau_{g} \) and dissipation constant, \( \delta_{g} \) – of commercially-available VECO ultra-small bead thermistors; these constants are essential parameters in thermal modeling of graphite calorimeters. For the above-mentioned kind of thermistors, the dissipation constant in graphite is found to be approximately ten times larger than that in still air, whereas the thermal time constant in graphite is approximately one hundred times smaller than that corresponding to a thermistor placed in still air.
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References
Domen, S.R.: Emissivity of aluminized Mylar. Radiat. Phys. Chem. 37, 199–201 (1991)
Laughlin, J.S., Genna, S.: Calorimetry. In: Attix, F.H., Roesch, W.C. (eds.) Radiation Dosimetry, vol. 2, 2nd edn. Academic Press, New York (1966)
Domen, S.R., Lamperti, P.J.: A heat-loss-compensated calorimeter: theory, design and performance. J. Res. NBS – A Phys. Chem. 78A(5), 596 (1974)
Janssens, A., et al.: Equilibration of a graphite absorbed-dose calorimeter and the quasi-isothermal mode of operation. Metrologia 22, 265–270 (1986)
Daures, J., Ostrowsky, A.: New constant-temperature operating mode for graphite calorimeter at LNE-LNHB. Phys. Med. Biol. 50, 4035–4052 (2005)
VECO Technical Bulletin MCT181 – Techniques for Testing Thermistors, Rev A 11-68, Printed in U.S.A., Victory Engineering Corporation, 1964, P.O. Box 559, Victory Road, Springfield, New Jersey 07081, TWX: 710-983-4430, Tel.: (Area 201) 379-5900
Sapoff, M., Oppenheim, R.M.: Theory and application of self-heated thermistors. In: Proceedings of the IEEE, pp. 1292–1305 (1963)
Tietze, H.: Famous Problems of Mathematics: Solved and Unsolved Mathematics Problems from Antiquity to Modern Times, p. 27. Graylock Press, New-York (1965)
Giaretto, V., Torchio, M.F.: Estimation of the thermal conductivity of an epoxy resin by the use of an internal parallelepiped heat source. II. Exp. Anal. High Temp. – High Pressures 31, 643–651 (1999)
ISO Guide to the Expression of Uncertainty in Measurement, 1st ed. ISBN 92-67-10188-9 (Geneva, Switzerland: International Organization for Standardization)
McEwen, M.R., Duane, S.: Development of a portable graphite calorimeter for photons and electrons. CIRM 42, 52–64 (1999)
Duane, S.: The NPL Primary Standard of Photon Absorbed Dose, CCRI(I)05–35, 3 p. (2005)
Ionita, C., Radu, D., Astefanoaei, I.: 3D-modeling of temperature gradients induced by electrical power dissipation in a 3-body Domen-type calorimeter for absorbed dose measurements. Mater. Sci. Eng., B 178(19), 1275–1284 (2013)
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Radu, D., Astefanoaei, I., Agheorghiesei, C. (2018). Dissipation and Thermal Time Constants in Graphite of an Ultra-Small Bead Thermistor. In: Luca, D., Sirghi, L., Costin, C. (eds) Recent Advances in Technology Research and Education. INTER-ACADEMIA 2017. Advances in Intelligent Systems and Computing, vol 660. Springer, Cham. https://doi.org/10.1007/978-3-319-67459-9_32
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DOI: https://doi.org/10.1007/978-3-319-67459-9_32
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