Thermoluminescence apparatus using PT100 resistors as the heating and sensing elements

Area of Science:

• Physics
• Materials Science
• Analytical Chemistry

Background:

• Thermoluminescence (TL) is a crucial phenomenon for dating, dosimetry, and material analysis.
• Accurate measurement of TL glow curves requires precise temperature control and a reliable heating element.
• Existing methods may involve complex or expensive apparatus, limiting accessibility and throughput.

Purpose of the Study:

• To develop a novel, cost-effective, and efficient apparatus for obtaining thermoluminescence glow curves.
• To design a system with a wide operational temperature range and rapid heating/cooling capabilities.
• To enable high-throughput analysis of multiple samples using modular components.

Main Methods:

• A sensing and heating element was constructed using two standard PT100 precision resistors connected back-to-back.
• Dry nitrogen gas-flow cooling was employed to achieve a wide operational temperature range (-50 to 450 °C).
• A custom-designed control circuit with software-implemented temperature ramps was utilized to drive the heating element.

Main Results:

• The apparatus features a 'hot finger' with very low thermal mass, nonreactive properties, and low cost.
• The system demonstrates an achievable operational range of -50 to 450 °C.
• Modularly interchangeable hot fingers facilitate rapid measurement of numerous samples.

Conclusions:

• The novel apparatus provides a simple, inexpensive, and effective solution for thermoluminescence glow curve analysis.
• The design allows for precise temperature control and efficient sample throughput.
• This development can advance research and applications in fields relying on thermoluminescence measurements.