本文選題：光纖馬赫-曾德?tīng)柛缮鎯x + 脈沖等離子體密度�。� 參考：《電子科技大學(xué)》2015年碩士論文

【摘要】：噴氣式Z箍縮等離子體是實(shí)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(qū)動(dòng)源轟擊氘氚靶源實(shí)現(xiàn)慣性約束聚變的燃料點(diǎn)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(cè)量一直是這一領(lǐng)域研究的重點(diǎn)內(nèi)容。激光干涉法與其他技術(shù)相比具有動(dòng)態(tài)響應(yīng)范圍大,精度高,可以實(shí)現(xiàn)對(duì)等離子體密度的非接觸測(cè)量等優(yōu)點(diǎn)而受到廣泛關(guān)注。但由光學(xué)分立元件和空間光路構(gòu)成的激光干涉儀具有結(jié)構(gòu)復(fù)雜,光路調(diào)校難度大,對(duì)環(huán)境要求苛刻等缺點(diǎn),在現(xiàn)場(chǎng)應(yīng)用難度大。光纖技術(shù)的快速發(fā)展使得高性能的光纖無(wú)源器件可以替代光學(xué)分立元件完成光學(xué)系統(tǒng)的搭建,這樣的系統(tǒng)結(jié)構(gòu)簡(jiǎn)單,除激光探針外所有的光路都在光纖內(nèi)部,調(diào)校簡(jiǎn)單,可以適應(yīng)復(fù)雜的應(yīng)用環(huán)境。本文研制了用于脈沖等離子體密度測(cè)量的全光纖Mach-Zehnder激光干涉儀較好地滿(mǎn)足了脈沖等離子體密度的測(cè)試需求。論文對(duì)用于等離子體密度測(cè)量的電磁探針技術(shù),微波診斷技術(shù),光譜診斷技術(shù)以及激光診斷技術(shù)進(jìn)行了分析比較,對(duì)Michelson干涉系統(tǒng)和Mach-Zehnder干涉系統(tǒng)進(jìn)行了研究,從而選擇了更適合于脈沖等離子體密度測(cè)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(duì)關(guān)鍵器件的原理以及參數(shù)進(jìn)行了詳細(xì)分析和計(jì)算。在此基礎(chǔ)上,設(shè)計(jì)研制了滿(mǎn)足脈沖等離子體密度測(cè)量的全光纖Mach-Zehnder激光干涉儀。論文還對(duì)干涉儀光路匹配、激光器光纖耦合調(diào)校以及光纖準(zhǔn)直器的空間對(duì)準(zhǔn)等干涉儀的關(guān)鍵調(diào)試方法進(jìn)行了詳細(xì)討論,將干涉儀用于現(xiàn)場(chǎng)測(cè)量,得到了良好的實(shí)驗(yàn)結(jié)果。研制的全光纖激光干涉儀選用的激光波長(zhǎng)為632.8nm,可以對(duì)密度在1013~1016cm-3范圍內(nèi)的等離子體進(jìn)行單點(diǎn)的密度測(cè)量,時(shí)間分辨率為1μs,相對(duì)誤差在2%以?xún)?nèi),空間分辨率為0.5mm。據(jù)我們所知,這是國(guó)內(nèi)首次將全光纖激光干涉儀用于脈沖等離子體密度測(cè)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(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TL612;TH744.3

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

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本文編號(hào)：1892972