本文選題：加速器　切入點(diǎn)：控制系統(tǒng)　出處：《南京大學(xué)》2012年碩士論文

【摘要】：第一部分 我參與了電子直線加速器控制系統(tǒng)方面的研制工作,主要涉及計(jì)算機(jī)控制裝置、電子槍控制電路和束流信號監(jiān)測裝置。我們研制的一種工業(yè)輻照電子直線加速器的計(jì)算機(jī)控制裝置,包括PLC主控制器,控制系統(tǒng)工作站和通訊裝置；工作站的人機(jī)控制界面采用SEP7和C等語言編寫。本裝置的特點(diǎn)包括通用性強(qiáng)、可靠性更好、功能更強(qiáng)大。我們設(shè)計(jì)的一種電子直線加速器用的電子槍控制電路,包括交流供電電路、電子槍可調(diào)控制電路和壓控調(diào)壓調(diào)相模塊。該電路可以通過控制電子槍的燈絲電壓實(shí)現(xiàn)加速器輸出電子束流的穩(wěn)定,也增加了電子槍控制電路工作的穩(wěn)定性和安全性。反饋電路的使用可以自行調(diào)節(jié)電子槍燈絲的發(fā)射,使其發(fā)射趨于穩(wěn)定。我們設(shè)計(jì)了一種電子直線加速器束流信號監(jiān)測裝置,包括脈沖束流后置放大器、束流積分放大器和束流監(jiān)測系統(tǒng)。束流檢測系統(tǒng)輸出的脈沖電壓信號可最終轉(zhuǎn)換為數(shù)字量,并通過數(shù)字表顯示束流值大小。本裝置與現(xiàn)有其他技術(shù)相比,使用方便,容易操作,穩(wěn)定性更好。 第二部分 光纖電流傳感器可應(yīng)用于電子直線加速器,作為感應(yīng)束流大小的手段。我研究了將在線式金屬線柵偏振光檢測器應(yīng)用到兩個(gè)光纖光學(xué)傳感器中。利用聚焦離子束技術(shù)將金屬線柵結(jié)構(gòu)加工到一個(gè)工作在1550nm波段的標(biāo)準(zhǔn)單模光纖的端面。金屬線柵選用的金屬是金,周期為200nm,尺寸遠(yuǎn)小于入射光的波長。根據(jù)有效介質(zhì)理論,通過金屬線柵結(jié)構(gòu)的透射光為偏振光。TE模式和TM模式的反射率對比度為13.7dB,其對比度和靈敏度可滿足彈光效應(yīng)和法拉第磁光效應(yīng)引起的偏振性變化的檢測要求�；诮饘倬�柵結(jié)構(gòu),得到了靈敏度為0.237rad/N的壓力傳感器和靈敏度為0.06022degree/A的電流傳感器。
[Abstract]:Part one. I was involved in the development of the electronic linear accelerator control system, mainly involved in computer control devices, The electronic gun control circuit and beam signal monitoring device. We developed a computer control device for industrial irradiation electron linear accelerator, including PLC main controller, control system workstation and communication device. The man-machine control interface of the workstation is written in SEP7 and C languages. The features of the device include strong versatility, better reliability and more powerful functions. We designed an electronic gun control circuit for the electronic linear accelerator. The circuit includes an AC power supply circuit, an electronic gun adjustable control circuit and a voltage-controlled voltage modulation module, which can achieve the stability of the output electron beam current of the accelerator by controlling the filament voltage of the electron gun. It also increases the stability and safety of the electron gun control circuit. The use of feedback circuit can adjust the emission of the electron gun filament and make its emission more stable. We have designed a beam signal monitoring device for the electron linear accelerator. It includes a pulse beam post-amplifier, a beam integral amplifier and a beam current monitoring system. The pulse voltage signal output from the beam detection system can be converted to digital value. Compared with other techniques, the device is easy to use, easy to operate and more stable. Part two. Fiber optic current sensors can be used in electronic linear accelerators, As a means of induced beam size, I have studied the application of on-line metal wire gate polarization detector to two optical fiber optical sensors. The metal wire gate structure is fabricated into a 1550nm wave using focused ion beam technology. The end face of the standard single-mode optical fiber for the segment. The metal used for the metal wire grid is gold, The period is 200 nm and the size is much smaller than the wavelength of incident light. According to the effective medium theory, The reflectivity contrast of the transmission light in the metal wire gate structure is 13.7dB in polarized light .te mode and TM mode. The contrast and sensitivity can meet the detection requirements of the polarization change caused by the elastic-optical effect and Faraday magneto-optic effect. In the metal wire grid structure, The pressure sensor with sensitivity of 0.237rad/N and the current sensor with sensitivity of 0.06022degree/A are obtained.
【學(xué)位授予單位】：南京大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TH774

【參考文獻(xiàn)】

相關(guān)期刊論文 前2條

1 趙明華;林國強(qiáng);鐘少鵬;汪寶亮;張駿強(qiáng);劉衛(wèi)紅;周偉民;陳永忠;;上海光源150MeV電子直線加速器的設(shè)計(jì)與調(diào)試[J];中國物理C;2008年S1期

2 康果果;譚嶠峰;陳偉力;李群慶;金偉其;金國藩;;亞波長金屬線柵的設(shè)計(jì)、制備及偏振成像實(shí)驗(yàn)研究[J];物理學(xué)報(bào);2011年01期

相關(guān)博士學(xué)位論文 前1條

1 羅小為;新型電子直線加速器改良與測試[D];中國科學(xué)技術(shù)大學(xué);2010年

，

本文編號：1668609