真空密封透射式微型微束調(diào)制X射線源
[Abstract]:As the "next generation new space communication method", space X-ray communication has a wide application prospect because of its good directivity, low transmission power, long transmission distance, strong confidentiality, no electromagnetic interference from space environment and wide communication band. It can greatly improve the increasing shortage of space communication frequency resources. As the key component of space X-ray communication, the modulation rate and focal spot size of modulation X-ray source will directly affect the communication rate and communication distance of X-ray, so the development of low power consumption, small volume and small focal spot will be developed. The modulation X-ray source with high modulation rate plays an important role in verifying X-ray communication technology and finally realizing space communication. The main research content of this paper is to carry out the theoretical analysis, physical modeling, simulation optimization, scheme design, key technology research and special process exploration of the transmission micro-beam modulation X-ray source of vacuum seal. The prototype development and performance test of the system are completed. The specific research contents and main results are as follows: using SIMION software to optimize and perfect the gate structure, the low voltage modulation of gate-0.6V is realized by simulation, and the amplitude of modulation voltage is reduced by nearly one order of magnitude. It is easy to realize the high frequency modulation of X-ray, so as to improve the communication rate of X-ray. The electronic kinematics of the three electrostatic focusing electrodes is simulated and optimized, and the focal spot size of 150 渭 m is obtained, which breaks the technical bottleneck that the hot cathode is difficult to focus into the micron focal spot, and lays the foundation for the long-distance communication of space X-ray. By using the simulation and optimization of MCNP software, the optimum target thickness of transmission anode target under different anode target and different electron energy is obtained, which improves the problem of low X-ray intensity of reflective anode target and helps to improve the modulation frequency of X-ray. In order to change the effect of conventional chemical plating process or vacuum coating process and the poor quality of coating, Be window cleaning, zinc replacement process and high vacuum ion sputtering process were explored. Referring to the sealing process of vacuum interrupter and exhaust at the same time, the full vacuum sealing of modulation X-ray source is realized, and the vacuum degree in the tube is higher than 10 脳 3PA, which solves the problem that the semi-vacuum X-ray tube needs to be put into the vacuum cavity when it works. The prototype is developed, and the gate amplitude modulation and pulse modulation of the modulation X-ray source are verified. Compared with the previous modulation X-ray sources, the innovative results of this paper are mainly reflected in the following four aspects: the low voltage modulation technology of gate-0.6V ~ 0.6V for modulating X-ray sources is studied and verified by experiments. It makes the high frequency modulation of X-ray possible. Three electrostatic focusing electrodes are used to improve the focusing ability of electron beam, and the microfocal spot size of 150 渭 m is simulated. The high vacuum seal of many components and the whole tube in the modulation X-ray source has been realized, and the vacuum sealing property is good, and the vacuum degree in the tube has been kept higher than that of 10-3Pa for more than two years. It is found for the first time that the MHz gate pulse frequency has a significant effect on the X-ray intensity. The modulation X-ray source is composed of four parts: hot cathode electron emission system, gate modulation, electrostatic focusing and transmission anode target. It integrates electron beam focusing and gate modulation functions, and the microfocal spot size of 150 渭 m is obtained by simulation. The low voltage modulation of gate-0.6V ~ 0.6V is realized. It is the latest fully vacuum sealed modulation X-ray source based on hot cathode in the world at present, which provides technical support for the verification of long-distance and high-speed space X-ray communication in our country.
【學(xué)位授予單位】:中國(guó)科學(xué)院國(guó)家空間科學(xué)中心
【學(xué)位級(jí)別】:博士
【學(xué)位授予年份】:2017
【分類號(hào)】:TN92
【相似文獻(xiàn)】
相關(guān)期刊論文 前10條
1 劉記;范玉鋒;;微束斑X射線源電子光學(xué)系統(tǒng)設(shè)計(jì)與數(shù)值模擬[J];真空電子技術(shù);2008年05期
2 友清;;阿貢實(shí)驗(yàn)室將建造超級(jí)X射線源[J];激光與光電子學(xué)進(jìn)展;1988年11期
3 從征;;用于芯片光刻的新型X射線源[J];激光與光電子學(xué)進(jìn)展;1991年05期
4 項(xiàng)名珠;陳君偉;;安檢X射線源高壓屏蔽設(shè)計(jì)研究[J];警察技術(shù);2012年01期
5 陳艷,曉晨;90年代多層膜軟X射線反射鏡的發(fā)展?fàn)顩r與未來(lái)動(dòng)向[J];激光與光電子學(xué)進(jìn)展;2000年07期
6 孫靈霞;李炬;周江;陳發(fā);葉云長(zhǎng);楊莞;周瑛;張愛(ài)東;;工業(yè)CT系統(tǒng)中射線源的精確定位[J];核電子學(xué)與探測(cè)技術(shù);2007年04期
7 白光;以釹激光激發(fā)脈沖氙氣流為基礎(chǔ)的無(wú)碎片軟X射線源[J];激光與光電子學(xué)進(jìn)展;2002年12期
8 夏宇正,陳光杰,王瀾;高能X射線工業(yè)CT關(guān)鍵技術(shù)的研究[J];CT理論與應(yīng)用研究;1997年01期
9 ;超短脈沖硬X射線源[J];光機(jī)電信息;1999年09期
10 李昊;沙京田;張文利;;安檢設(shè)備用X射線源熱仿真研究[J];機(jī)械設(shè)計(jì)與制造;2013年05期
相關(guān)會(huì)議論文 前10條
1 胡廣月;;點(diǎn)背光熱輻射X射線源的設(shè)計(jì)和物理特征[A];第十五屆全國(guó)等離子體科學(xué)技術(shù)會(huì)議會(huì)議摘要集[C];2011年
2 許州;金曉;黎明;楊興繁;陳浩;盧和平;潘清;沈旭明;單李軍;;高能工業(yè)CT用新型加速器X射線源[A];中國(guó)工程物理研究院科技年報(bào)(2003)[C];2003年
3 趙帥;魏東波;張立凱;;微焦點(diǎn)X射線源成像質(zhì)量分析與研究[A];全國(guó)射線數(shù)字成像與CT新技術(shù)研討會(huì)論文集[C];2009年
4 李剛;張玉愛(ài);吳志芳;;凸度儀中X射線源監(jiān)控系統(tǒng)的設(shè)計(jì)[A];第十五屆全國(guó)核電子學(xué)與核探測(cè)技術(shù)學(xué)術(shù)年會(huì)論文集[C];2010年
5 楊國(guó)洪;張繼彥;丁永坤;楊家敏;丁耀南;汪艷;李軍;易榮清;江少恩;黃翼翔;胡昕;杜華冰;張文海;李朝光;崔延莉;;X射線單能成像技術(shù)[A];中國(guó)工程物理研究院科技年報(bào)(2005)[C];2005年
6 郭彥斌;;高能X射線源下膠片照相和數(shù)字照相的應(yīng)用分析[A];2006全國(guó)荷電粒子源、粒子束學(xué)術(shù)會(huì)議論文集[C];2006年
7 李志宏;吳忠華;吳自玉;;小角X射線散射的研究進(jìn)展[A];第十屆全國(guó)青年材料科學(xué)技術(shù)研討會(huì)論文集(C輯)[C];2005年
8 曹健林;金春水;;軟X射線光學(xué)的研究進(jìn)展[A];西部大開(kāi)發(fā) 科教先行與可持續(xù)發(fā)展——中國(guó)科協(xié)2000年學(xué)術(shù)年會(huì)文集[C];2000年
9 李曉麗;;X射線模擬軟件(XRSIM)及其應(yīng)用[A];全國(guó)射線數(shù)字成像與CT新技術(shù)研討會(huì)論文集[C];2009年
10 陳浩;許州;金曉;黎明;單李軍;盧和平;潘清;;新型9MeV加速器X射線源性能參數(shù)測(cè)量[A];四川省電子學(xué)會(huì)高能電子學(xué)專業(yè)委員會(huì)第四屆學(xué)術(shù)交流會(huì)論文集[C];2005年
相關(guān)重要報(bào)紙文章 前3條
1 龐炳良 譯;X射線的洞察力[N];北京科技報(bào);2000年
2 張巍巍;極強(qiáng)X射線源可催生新的物質(zhì)狀態(tài)[N];科技日?qǐng)?bào);2009年
3 本報(bào)記者 劉垠;空間硬X射線調(diào)制望遠(yuǎn)鏡:打開(kāi)國(guó)人觀測(cè)宇宙新窗口[N];大眾科技報(bào);2005年
相關(guān)博士學(xué)位論文 前9條
1 王凱歌;微束斑X射線源的理論與實(shí)驗(yàn)研究[D];中國(guó)科學(xué)院研究生院(西安光學(xué)精密機(jī)械研究所);2002年
2 楊強(qiáng);微型X射線源關(guān)鍵技術(shù)研究[D];成都理工大學(xué);2012年
3 李成剛;高能X射線源焦斑尺寸診斷技術(shù)研究[D];中國(guó)工程物理研究院;2015年
4 牟歡;真空密封透射式微型微束調(diào)制X射線源[D];中國(guó)科學(xué)院國(guó)家空間科學(xué)中心;2017年
5 解濱;微型X射線源研究[D];中國(guó)科學(xué)院研究生院(長(zhǎng)春光學(xué)精密機(jī)械與物理研究所);2004年
6 涂紹勇;納秒激光脈沖驅(qū)動(dòng)的高強(qiáng)度數(shù)千電子伏X射線源的研究[D];中國(guó)科學(xué)技術(shù)大學(xué);2014年
7 杜應(yīng)超;基于湯姆遜散射X射線源的理論及初步實(shí)驗(yàn)研究[D];清華大學(xué);2006年
8 劉毅楠;軟X射線多層膜若干基礎(chǔ)問(wèn)題研究[D];中國(guó)科學(xué)院長(zhǎng)春光學(xué)精密機(jī)械與物理研究所;2000年
9 宋利民;軟X射線多層膜反射鏡的設(shè)計(jì)與制作[D];大連理工大學(xué);2002年
相關(guān)碩士學(xué)位論文 前10條
1 張小嬌;工業(yè)CT系統(tǒng)X射線源控制的研究與實(shí)現(xiàn)[D];重慶大學(xué);2011年
2 吳小龍;靜電自會(huì)聚六硼化鑭X射線源的研究[D];電子科技大學(xué);2014年
3 鄭賽春;基于常規(guī)X射線源分析晶體成像的模擬研究和實(shí)驗(yàn)平臺(tái)的物理設(shè)計(jì)[D];蘭州大學(xué);2016年
4 石偉;基于碳納米管X射線源的靜態(tài)數(shù)字乳腺機(jī)控制系統(tǒng)設(shè)計(jì)[D];湖南大學(xué);2015年
5 劉彩;微焦CT控制系統(tǒng)研制[D];重慶大學(xué);2016年
6 嚴(yán)曉強(qiáng);線焦斑X射線源的模擬與設(shè)計(jì)[D];深圳大學(xué);2016年
7 徐小東;微結(jié)構(gòu)陽(yáng)極X射線源中電子與靶作用過(guò)程的蒙特卡羅研究[D];深圳大學(xué);2017年
8 陳定陽(yáng);利用聚束透鏡獲得高亮度軟X射線源的技術(shù)研究[D];中國(guó)工程物理研究院;2008年
9 杜應(yīng)超;湯姆遜散射X射線源理論研究及初步實(shí)驗(yàn)設(shè)計(jì)[D];清華大學(xué);2004年
10 王瑋;225keVX射線源平臺(tái)射線的產(chǎn)生與分布模擬[D];蘭州大學(xué);2014年
,本文編號(hào):2485388
本文鏈接:http://sikaile.net/shoufeilunwen/xxkjbs/2485388.html