Investigation of miniaturized radioisotope thermionic power generation for general use

Adam J. Duzik; Sang H. Choi

doi:10.1117/12.2222039

16 April 2016 Investigation of miniaturized radioisotope thermionic power generation for general use

Adam J. Duzik, Sang H. Choi

Proceedings Volume 9802, Nanosensors, Biosensors, and Info-Tech Sensors and Systems 2016; 98020C (2016) https://doi.org/10.1117/12.2222039
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2016, Las Vegas, Nevada, United States

Abstract

Radioisotope thermoelectric generators (RTGs) running off the radioisotope Pu²³⁸ are the current standard in deep space probe power supplies. While reliable, these generators are very inefficient, operating at only ~7% efficiency. As an alternative, more efficient radioisotope thermionic emission generators (RTIGs) are being explored. Like RTGs, current RTIGs concepts use exotic materials for the emitter, limiting applicability to space and other niche applications. The high demand for long-lasting mobile power sources would be satisfied if RTIGs could be produced inexpensively. This work focuses on exposing several common materials, such as Al, stainless steel, W, Si, and Cu, to elevated temperatures under vacuum to determine the efficiency of each material as inexpensive replacements for thermoelectric materials.

Citation Download Citation

Adam J. Duzik and Sang H. Choi "Investigation of miniaturized radioisotope thermionic power generation for general use", Proc. SPIE 9802, Nanosensors, Biosensors, and Info-Tech Sensors and Systems 2016, 98020C (16 April 2016); https://doi.org/10.1117/12.2222039

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