Development of miniature heater assembly for compact battery powered thermo-luminescence reader

Abstract

The miniature heater assembly has been developed for a compact portable battery powered thermoluminescence (TL) reader system. The construction and thermodynamics of this heater assembly has been described in detailed. The theoretical modeling of the heating processes participating in the heater assembly has been evolved and substantiated with experimental evidential analysis. The heat generation rate equations have been formulated by considering the radiative and conduction losses. The formulated theoretical model matches well within the experimental findings under some assumptions made in generation of linear/non-linear and constant temperature heating profiles for a variable heating rate in the range of 0.1 K s −1 to 4 K s −1 with maximum temperature of 400 °C. The developed miniature heater assembly was installed in newly designed battery powered TL reader system. This TL reader system works on four 1.2V, 2.8Ah, Ni-Mh re-chargeable batteries. The TL glow curve of α-Al 2 O 3 :C, CaSO 4 :Dy, and LiCaAlF 6 :Eu,Y (LCAF) phosphor were recorded using the developed heating assembly.