碩士生: 張博傑
畢業年月: 2025年7月
論文名稱: 應用於離子推進器的電漿羽流診測之旋轉量測系統設計 / Design of a rotating diagnostic system applied for plasma plume characteristics of ion thrusters
中文摘要:
法拉第探針廣泛用於量測射頻離子與霍爾推進器羽流的電流密度角分布，但旋轉機構、角度控制精度與資料擷取程序等整體量測系統造成的誤差，過去較少探討。本研究設計並建構具旋轉功能的羽流角度量測系統，整合旋轉台、法拉第探針與資料擷取模組，以射頻離子推進器作為穩定電漿源，評估其運作穩定性與量測精度。結果顯示羽流核心區各角度的電流密度一致性良好，變異係數低於20%，±10°內更低於10%；每次量測至少需15個資料點才能確保穩定，並在探針距推進器200、250與300 mm處成功量測，顯示系統具彈性與重複性，可用於其他推進器的羽流診斷。
英文摘要:
The Faraday probe is widely used to measure angular current density distributions in the plumes of RF ion and Hall thrusters, but errors from the overall measurement system, such as rotation mechanism, angular control precision, and data acquisition, are rarely studied. This thesis designs and builds a rotating plume measurement system that integrates a rotary stage, a Faraday probe, and a data acquisition module, using an RF ion thruster as a stable plasma source, and evaluates its stability and accuracy. In the plume core, current density at different angles is consistent, with coefficients of variation below 20% and below 10% within ±10°. At least 15 data points per measurement are needed for stability, and successful measurements at 200, 250, and 300 mm show flexibility and repeatability for diagnosing other thrusters.
