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系統識別號 U0026-1908201918365600
論文名稱(中文) 用於立方衛星之浮動式蘭摩爾探針的研發
論文名稱(英文) Development of the floating Langmuir probe for cubesats
校院名稱 成功大學
系所名稱(中) 太空與電漿科學研究所
系所名稱(英) Institute of Space and Plasma Sciences
學年度 107
學期 2
出版年 108
研究生(中文) 王翊臻
研究生(英文) Yi-Chen Wang
學號 LA6064046
學位類別 碩士
語文別 中文
論文頁數 57頁
口試委員 指導教授-陳炳志
口試委員-趙怡欽
口試委員-楊毅
中文關鍵字 none 
英文關鍵字 floating Langmuir probe  cubesat  ionosphere  re-entry 
學科別分類
中文摘要 隨著小型衛星的發展,近幾年主要著重於研究電離層小尺度的變化及複進入之研究,電離層在300 公里以下,電漿密度變化劇烈,使傳統蘭摩爾探針難以應對。本論文提出了一種基於雙探針和三探針原理的電位浮動電路測量電子溫度和密度的方法,稱為浮動式蘭摩爾探針。浮動式蘭摩爾探針目標是能適用於立方衛星,並量測電離層以及複進入時,環境電漿之電子密度與電子溫度。
浮動式蘭摩爾探針與傳統蘭摩爾探針最大的不同是透過使電位浮動,能夠穩定的在立方衛星上進行電漿的量測,經由探針蒐集到的電流,可以得到電子密度與電子溫度兩項電漿參數,並擁有遠超過傳統蘭摩爾探針的高時間解析度,能夠應對複進入時高速變化的電漿。本論文中探討儀器設計原理、電路結構、探針電極電場之模擬以及雛形體置在太空電漿實驗腔中的測試結果。
在實際量測中已經驗證了浮動式蘭摩爾探針之性能,並透過與傳統蘭摩爾探針結果的比較,確認了浮動式蘭摩爾探針能夠在電位浮動的環境下穩定運作,並進行遠超傳統蘭摩爾探針時間解析度的量測。此探針預計將可應用於未來之可返航載具研究,由於其設計可進行高溫電漿之現地量測,因此亦可應用於未來台灣與國際之合作計畫。
英文摘要 In recent years, the small-scale variation of the ionosphere and the re-entry process greatly draw scientists attentions. The plasma density of ionosphere in the region below 300 km varies dramatically, and electrons interact with ions frequently, the conventional Langmuir probe is not applicability of the research in this region due to its low temporal resolution. In this work, an innovated approach of the electron temperature (Te) and density (ne) measurements by an electrically floated circuit based on the principles of the double and triple Langmuir probes, named as the floating Langmuir probe (fLP), is presented. Hence, the goal of this work is to advance the a new measurement instrument based on the conventional Langmuir probe and make it suitable for cubesats to measure the plasma in the ionosphere and the atmospheric re-entry process. Comparing with the conventional Langmuir probe, fLP is designed as an electrically floating system, therefore it can measure the plasma on-board a cubesat stably with a high temporal resolution to measure the highly variating plasma during the atmospheric re-entry process. In this work, the design concept, performance analysis by simulation, hardware development and in-lab experiments of the fLP are presented. The electron temperature and density measured by the fLP at a well-floated system is verified by a well-grounded conventional Langmuir probe in the Space Plasma Operation Chamber owned by NCKU. It is demonstrated that the fLP neither influenced nor was influenced by the satellite potential variations. This instrument is capable of not only ionospheric plasma exploration, but also for the high-temperature and high-density plasma investigations around the spacecraft during its re-entry processes.
論文目次 第一章 簡介 1
1.1電漿 1
1.2地球電離層與立方衛星 2
1.3研究動機 7
第二章 浮動式蘭摩爾探針理論 8
2.1 傳統蘭摩爾探針 8
2.1.1電子電流與離子電流 11
2.2 浮動式蘭摩爾探針 13
2.2.1雙探針模式 14
2.2.3 雙探針模式方法 15
2.2.4 雙探針模式下的I-V 曲線 17
2.3.5 三探針模式 20
2.3.6 三探針模式量測方法 21
第三章 浮動式蘭摩爾探針系統設計 24
3.1 浮動式蘭摩爾探針系統 24
3.1.1 前置放大電路 26
3.1.2緩衝器 28
3.1.3 隔離放大器 29
3.1.4 浮動式蘭摩爾探針電路 30
3.1.5 浮動式蘭摩爾探針電極設計 32
第四章 太空電漿實驗腔中的實驗 34
4.1 太空電漿實驗腔的電漿環境 34
4.2實驗架設 37
4.3同軸電纜電容效應 38
4.4浮動式蘭摩爾探針在雙探針模式下的I-V 曲線 41
4.5 浮動式蘭摩爾探針在三探針模式下的量測 45
第五章 電極電場之模擬 48
5.1模擬方法 48
5.2 探針上的電位曲線 49
5.3 離子軌跡 52
第六章 結論 55
References 56
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