本文選題：X波段相對(duì)論返波管振蕩器(RBWO) + 低磁場��； 參考：《西南科技大學(xué)》2015年碩士論文

【摘要】：在相對(duì)論返波管振蕩器(Relativistic Backward Wave Oscillator,RBWO)的研究過程中,發(fā)現(xiàn)相對(duì)論電子束在器件中傳輸需要磁場對(duì)其約束與引導(dǎo),絕大部分RBWO需要3T以上引導(dǎo)磁場。一般的脈沖螺旋管磁體通常只能工作在單次脈沖狀態(tài),制約了RBWO的重復(fù)頻率工作,為了實(shí)現(xiàn)器件的重復(fù)頻率運(yùn)行,則需要采用超導(dǎo)磁體來提供引導(dǎo)磁場,或者從器件設(shè)計(jì)上研制低磁場RBWO,由于超導(dǎo)磁場系統(tǒng)體積龐大對(duì)高功率微波源(High Power Microwave,HPM)系統(tǒng)小型化的發(fā)展極為不利,因而本文從器件設(shè)計(jì)上降低RBWO引導(dǎo)磁場,對(duì)器件在低磁場條件下工作進(jìn)行了詳細(xì)研究。首先,從回旋共振理論分析相對(duì)論返波管工作的磁場要求,對(duì)RBWO低磁場條件下工作進(jìn)行了理論研究,分析相對(duì)論返波管工作在低磁場條件下的原因以及研究慢波結(jié)構(gòu)的色散特性;考慮零階空間諧波并從單波假設(shè)與微擾假設(shè)理論出發(fā)推導(dǎo)了相對(duì)論返波管振蕩器產(chǎn)生的微波功率與引導(dǎo)磁場之間關(guān)系。其次,基于永磁磁體的參數(shù),結(jié)合高功率微波器件的優(yōu)點(diǎn),通過粒子模擬軟件Magic完成了X波段低磁場相對(duì)論返波管的設(shè)計(jì)并對(duì)其進(jìn)行了粒子模擬研究。分析慢波結(jié)構(gòu)、二極管電壓和電流對(duì)返波管振蕩器工作特性的影響,優(yōu)化器件參數(shù),通過對(duì)器件結(jié)構(gòu)采用非均勻慢波結(jié)構(gòu)大大提高了束波轉(zhuǎn)換效率。通過PIC粒子模擬能夠得到輸出微波功率1.11GW,束波轉(zhuǎn)換效率30%。最后,通過脈沖螺線管磁體提供單次脈沖磁場對(duì)低磁場相對(duì)論返波管進(jìn)行實(shí)驗(yàn)驗(yàn)證,為永磁包裝RBWO提供必要的實(shí)驗(yàn)數(shù)據(jù)。在RBWO得到穩(wěn)定微波輸出實(shí)驗(yàn)數(shù)據(jù)基礎(chǔ)下,文章通過Magic軟件對(duì)RBWO在類似永磁磁場分布下進(jìn)行模擬,并采用永磁磁體來提供磁場對(duì)器件進(jìn)行了實(shí)驗(yàn)研究,實(shí)驗(yàn)結(jié)果與用脈沖磁場得到的基本一致。本文還對(duì)器件進(jìn)行了重復(fù)頻率20Hz的實(shí)驗(yàn),結(jié)果表明,器件能夠穩(wěn)定的工作在重復(fù)頻率20Hz條件下,該實(shí)驗(yàn)結(jié)果為器件永磁包裝打下了結(jié)實(shí)的基礎(chǔ),同時(shí)也為HPM系統(tǒng)小型化創(chuàng)造了必要的條件。
[Abstract]:In the research of relativistic backward Wave Oscillator (RBWO), it is found that the relativistic electron beam transmission in the device requires a magnetic field to restrain and guide it, and most RBWO require a guiding magnetic field above 3T. Generally, the pulse spiral tube magnets can only work in a single pulse state, which restricts the repetition rate of RBWO. In order to realize the repetitive frequency operation of the device, it is necessary to use superconducting magnets to provide the guiding magnetic field. Or the low magnetic field RBWO is developed from the device design. Because the large volume of superconducting magnetic field system is very disadvantageous to the development of high power microwave source (HPM) system miniaturization, so this paper reduces the RBWO guiding magnetic field in device design. The device is studied in detail under the condition of low magnetic field. Firstly, the theory of cyclotron resonance is used to analyze the magnetic field requirement of the relativistic backwave-return tube, and a theoretical study is carried out on the RBWO working under low magnetic field. The reason of the relativistic backwave tube working under low magnetic field and the dispersion characteristics of the slow-wave structure are analyzed. Considering zero order spatial harmonics and starting from the theory of single wave hypothesis and perturbation hypothesis, the relationship between microwave power and guided magnetic field of relativistic backward-wave tube oscillator is derived. Secondly, based on the parameters of permanent magnet and the advantages of high power microwave devices, the particle simulation software Magic is used to complete the design and study of the X-band relativistic wave return tube with low magnetic field. The effects of slow wave structure, diode voltage and current on the operating characteristics of the backward-wave oscillator are analyzed, and the device parameters are optimized. The beam conversion efficiency is greatly improved by adopting a non-uniform slow-wave structure for the device structure. The output microwave power of 1.11GW and beam conversion efficiency of 30g can be obtained by PIC particle simulation. Finally, the experimental verification of the relativistic backwave-return tube with low magnetic field is carried out by the pulsed solenoid magnet, which provides the necessary experimental data for the permanent magnetic packaging RBWO. On the basis of stable microwave output experimental data obtained from RBWO, this paper simulates RBWO under similar permanent magnetic field distribution by Magic software, and uses permanent magnetic magnet to provide magnetic field to the device. The experimental results are in good agreement with those obtained by pulsed magnetic field. The experimental results show that the device can work stably at the repetition rate of 20Hz, which lays a solid foundation for the permanent magnetic packaging of the device. At the same time, it also creates necessary conditions for miniaturization of HPM system.
【學(xué)位授予單位】：西南科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TN125

【參考文獻(xiàn)】

相關(guān)期刊論文 前7條

1 馬喬生,李正紅,孟凡寶,甘延青,劉忠,常安碧,周傳明;重復(fù)頻率X波段類周期加載微波腔的實(shí)驗(yàn)研究[J];高能物理與核物理;2005年10期

2 吳洋;許州;李正紅;馬喬生;唐傳祥;;High efficiency X-band relativistic backward wave oscillator with non-uniform slow wave structures[J];中國物理C;2012年08期

3 張軍,鐘輝煌,楊建華,舒挺;具有諧振腔的多波切倫柯夫振蕩器的粒子模擬[J];強(qiáng)激光與粒子束;2003年01期

4 楊梓強(qiáng)，李大治，梁正;相對(duì)論返波管頻率特性研究[J];強(qiáng)激光與粒子束;1996年04期

5 李正紅;常安碧;鞠炳全;張永輝;向飛;趙殿林;甘延青;劉忠;蘇昶;黃華;;準(zhǔn)兩腔振蕩器的理論和實(shí)驗(yàn)研究[J];物理學(xué)報(bào);2007年05期

6 吳洋;金曉;馬喬生;李正紅;鞠炳全;蘇昶;許州;唐傳祥;;X波段重頻過模返波振蕩器實(shí)驗(yàn)研究[J];物理學(xué)報(bào);2011年08期

7 馬喬生;李正紅;吳洋;;低引導(dǎo)磁場相對(duì)論返波管振蕩器設(shè)計(jì)[J];微波學(xué)報(bào);2013年02期

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