Calibration of A Miniaturized Solar Extreme Ultraviolet Probe

Abstract

The Phoenix cubesat was developed at National Cheng Kung University (NCKU) as a unit of the QB50 mission which is an international space collaboration coordinated by the von Karman Institute for Fluid Dynamics and it was launched successfully in April 2017 and deployed in the orbit of 400km-height from the International Space Station on May 17 2017 The Phoenix cubesat accommodated the following payloads: An Ion and Neutral Mass Spectrometer Thermistors and a Solar Extreme Ultraviolet Probe (SEUV Probe) which was developed by NCKU The SEUV Probe can measure photoelectric current when its cop-per-based electrodes which is plated with gold and tin exposes to the sun ultraviolet light However there was no suitable instrument to calibrate the SEUV Probe quantitatively so that the SEUV Probe placed in the orbit only measured relative intensities of photoelectric current instead of the solar extreme ultraviolet flux In this study to complete the calibration of the SEUV Probe a deuterium lamp was used as the ultraviolet light source and a dark and vacuum environment was set to reduce the absorption caused by air After calibration the photoelectric current measured by the SEUV Probe on the Phoenix cubesat can be turned to the absolute flux of the solar extreme ultraviolet With the features of lightweight compact and low power consumption the calibrated SEUV probe can be placed not only on cubesat but on sounding rocket or balloon to obtain more data to explore the variation of the solar extreme ultraviolet flux

Date of Award	2020
Original language	English
Supervisor	Bing-Chih Chen (Supervisor)