本文選題：光纖馬赫-曾德爾干涉儀 + 脈沖等離子體密度��； 參考：《電子科技大學》2015年碩士論文

【摘要】：噴氣式Z箍縮等離子體是實現(xiàn)受控核聚變的可能途徑之一。Z箍縮裝置發(fā)射出的脈沖等離子體可以作為高能驅動源轟擊氘氚靶源實現(xiàn)慣性約束聚變的燃料點火。為了便于理解該裝置的輻射行為,脈沖等離子體密度的測量一直是這一領域研究的重點內容。激光干涉法與其他技術相比具有動態(tài)響應范圍大,精度高,可以實現(xiàn)對等離子體密度的非接觸測量等優(yōu)點而受到廣泛關注。但由光學分立元件和空間光路構成的激光干涉儀具有結構復雜,光路調校難度大,對環(huán)境要求苛刻等缺點,在現(xiàn)場應用難度大。光纖技術的快速發(fā)展使得高性能的光纖無源器件可以替代光學分立元件完成光學系統(tǒng)的搭建,這樣的系統(tǒng)結構簡單,除激光探針外所有的光路都在光纖內部,調校簡單,可以適應復雜的應用環(huán)境。本文研制了用于脈沖等離子體密度測量的全光纖Mach-Zehnder激光干涉儀較好地滿足了脈沖等離子體密度的測試需求。論文對用于等離子體密度測量的電磁探針技術,微波診斷技術,光譜診斷技術以及激光診斷技術進行了分析比較,對Michelson干涉系統(tǒng)和Mach-Zehnder干涉系統(tǒng)進行了研究,從而選擇了更適合于脈沖等離子體密度測量的Mach-Zehnder干涉系統(tǒng)方案。深入分析了Mach-Zehnder干涉儀的工作原理,對關鍵器件的原理以及參數進行了詳細分析和計算。在此基礎上,設計研制了滿足脈沖等離子體密度測量的全光纖Mach-Zehnder激光干涉儀。論文還對干涉儀光路匹配、激光器光纖耦合調校以及光纖準直器的空間對準等干涉儀的關鍵調試方法進行了詳細討論,將干涉儀用于現(xiàn)場測量,得到了良好的實驗結果。研制的全光纖激光干涉儀選用的激光波長為632.8nm,可以對密度在1013~1016cm-3范圍內的等離子體進行單點的密度測量,時間分辨率為1μs,相對誤差在2%以內,空間分辨率為0.5mm。據我們所知,這是國內首次將全光纖激光干涉儀用于脈沖等離子體密度測量。
[Abstract]:The jet type Z pinch plasma is one of the possible ways to realize the controlled nuclear fusion. The pulsed plasma emitted by the.Z stirrup device can be used as a high-energy source to bombard the deuterium and tritium target source to realize the ignition of the inertial confinement fusion fuel. In order to understand the radiation behavior of the device, the measurement of the pulse plasma density has always been this field. Compared with other technologies, laser interferometry has large dynamic response range and high precision, and can realize the advantages of non-contact measurement of plasma density. However, the laser interferometer composed of optical discrete components and space optical path has complex structure, difficulty in adjusting optical path and environmental requirements. The rapid development of optical fiber technology makes the high-performance optical fiber passive devices can replace the optical discrete components to build the optical system. This system has simple structure. All optical paths except the laser probe are in the optical fiber, the adjustment is simple and can adapt to the complex application environment. The whole fiber Mach-Zehnder laser interferometer for measuring the density of the pulsed plasma is better satisfied with the testing requirement of the pulse plasma density. The paper analyzes and compares the electromagnetic probe technology, the microwave diagnosis technology, the spectral diagnosis technology and the laser diagnosis technology for the plasma density measurement, and the Michelson dry. The system and Mach-Zehnder interference system have been studied, and the Mach-Zehnder interference system which is more suitable for pulse plasma density measurement is selected. The working principle of Mach-Zehnder interferometer is analyzed in depth. The principle and parameters of the key devices are analyzed and calculated in detail. On this basis, the design and development of the system have been designed and developed. All optical fiber Mach-Zehnder laser interferometer with pulse plasma density measurement is discussed in detail. The key debugging methods of interferometer optical path matching, laser optical fiber coupling adjustment and spatial alignment of optical fiber collimator are discussed in detail. The interferometer is used in field measurement, and good experimental results are obtained. The laser wavelength of the fiber laser interferometer is 632.8nm, which can measure the density of the plasma in the range of 1013~1016cm-3. The time resolution is 1 mu s, the relative error is less than 2%. The spatial resolution is 0.5mm. according to our knowledge. This is the first time in China to use all fiber laser interferometer for pulsed plasma density measurement. Quantity.

【學位授予單位】：電子科技大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TL612;TH744.3

【參考文獻】

相關期刊論文 前2條

1 李小銀,林兆祥,劉煜炎,陳揚鋟,龔順生;激光大氣等離子體光譜特性實驗研究[J];光學學報;2004年08期

2 揭銀先,高翔,方自琛,鄧必河,沈哲,廖子英,謝紀康,衛(wèi)明生,李廣,呂惠娟,郭其良,李建剛;用遠紅外HCN激光干涉儀測量等離子體電子密度[J];紅外技術;1997年02期

，

本文編號：1892972