Ayeleso, A O and van Zyl, R R (2016) Photocurrents obtained from a triple planar probe sensor for in situ extreme ultraviolet (euv) radiation measurements on low earth orbiting cubesats. Journal of Engineering, Design and Technology, 14(3), pp. 641-651.
Abstract
Purpose In the Earth’s upper atmosphere, damage to satellite electronics is caused by exposure to extreme ultraviolet (EUV) radiation. One particular region where this type of radiation occurs is the South Atlantic Magnetic Anomaly region. As a result, there is a need to design and develop a sensor which could be used to investigate the flux and energy levels of radiation in this region. To do so, the aim of this study is to characterise the sensor and its electric response to typical EUV radiation levels based on the photoelectric effect principle. Design/methodology/approach For this purpose, a copper plate planar sensor prototype with dimensions that fit on the sides of a one-unit (1U) CubeSat was constructed. The sensor prototype was placed in a vacuum chamber and was subjected to continuous radiation from a vacuum ultraviolet deuterium light source at test facilities available in the Western Cape region (South Africa). Subsequently, the terminal voltage of the sensor was measured and compared with theory. Findings The measured time-averaged terminal voltages indicate the generation of photocurrents of the order of 1 μA, which is consistent with theory. Originality/value Conclusively, these results validate the measurement approach and operation of the sensor, which can be used to design a 1U CubeSat sensor that measures EUV radiation in low Earth orbit.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | cubesat; radiation; planar sensor; sama; satellite electronic systems; deuterium light source |
| Index terms: | dimension, test facility, in-situ, planar sensor, copper, prototype, South Africa, satellite, exposure, methodology |
| Subjects: | modelling and simulation, health monitoring assessment and metrics, networking, testing methods, building construction, research methods, public and environmental health, traditional and composite building materials, Geography, computer vision |
| Topics: | Digital Applications, Health and Safety, Construction Materials, Engineering Principles, Geographical Context, Research Practice |
| Descriptive scope: | 3 PCT |
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