本文選題：多注速調(diào)管 + 電子光學(xué)系統(tǒng)　； 參考：《電子科技大學(xué)》2016年碩士論文

【摘要】：在單注管基礎(chǔ)上采用多個(gè)電子注并聯(lián)技術(shù)改進(jìn)而來(lái)的多注速調(diào)管(MBK)屬于一種新型微波電真空器件,其在工作電壓、頻帶、效率、增益、體積和重量等方面比單注速調(diào)管更具技術(shù)優(yōu)勢(shì)。雙模多注速調(diào)管可根據(jù)控制極電壓的設(shè)置而工作在脈沖和連續(xù)波兩種工作模式,此類速調(diào)管高頻部分一般采用高次模的圓柱形諧振腔、同軸腔。數(shù)值計(jì)算表明,高次模諧振腔的電場(chǎng)能量最大位置分布在一個(gè)半徑較大的圓周上,為獲得高的駐波互作用效率,工程設(shè)計(jì)上往往將電子通道置于電場(chǎng)能量最大處,意味著多注電子通道處于旁軸位置。此結(jié)構(gòu)布局將加劇橫向磁場(chǎng)對(duì)注的干擾和影響。對(duì)稱聚焦磁場(chǎng)中心線上橫向磁場(chǎng)值最小,故要降低橫向磁場(chǎng)的不良影響,得到層流性良好的聚焦電子注,需要使聚焦場(chǎng)對(duì)稱中心盡量與電子注軸線重合。雙模多注速調(diào)管電子光學(xué)系統(tǒng)的設(shè)計(jì)對(duì)開(kāi)展相關(guān)項(xiàng)目的研制及拓展空心注電子槍的使用具有重要的意義,借助現(xiàn)有的電子光學(xué)模擬軟件進(jìn)行模擬仿真,是一種不錯(cuò)的輔助設(shè)計(jì)方法。但從計(jì)算資源和耗時(shí)方面看,利用三維電子光學(xué)模擬軟件對(duì)整個(gè)多注電子光學(xué)系統(tǒng)進(jìn)行模擬和分析不是很合算,因此,將多注系統(tǒng)簡(jiǎn)化為單注系統(tǒng),再利用二維軟件進(jìn)行模擬研究不失為一種簡(jiǎn)便的間接設(shè)計(jì)方法。本課題以在研X波段75kW雙模多注速調(diào)管的電子光學(xué)系統(tǒng)為研究對(duì)象,進(jìn)行實(shí)例模擬和分析,以期設(shè)計(jì)出滿足該多注速調(diào)管項(xiàng)目的電子光學(xué)系統(tǒng)。在設(shè)計(jì)中,首先對(duì)速調(diào)管多注電子光學(xué)系統(tǒng)提出了初步的設(shè)計(jì)方案和模擬方案,再采用TAU二維電子光學(xué)仿真軟件對(duì)所設(shè)計(jì)的三種結(jié)構(gòu)類型的單注電子槍進(jìn)行編程計(jì)算和對(duì)比,為電子槍選型提供了參考。利用MAXWELL電磁仿真軟件對(duì)磁聚焦系統(tǒng)進(jìn)行建模和仿真,并分析橫向場(chǎng)的影響。最后運(yùn)用三維仿真軟件MTSS對(duì)多注電子光學(xué)系統(tǒng)進(jìn)行了仿真并與TAU的單注計(jì)算情況進(jìn)行了比較,兩者皆滿足設(shè)計(jì)要求,表明了將多注系統(tǒng)簡(jiǎn)化為單注系統(tǒng)進(jìn)行設(shè)計(jì)的方法是可行的。
[Abstract]:Multi-beam klystron (MBK) is a new type of microwave electric vacuum device, which is improved by using multiple electron beam parallel technology on the basis of single injection tube, and its working voltage, frequency band, efficiency, gain, etc. Volume and weight are more technical advantages than single injection klystron. Two-mode multi-beam klystron can work in pulse and continuous wave mode according to the voltage of control pole. The high frequency part of this kind of klystron is usually a cylindrical resonator with high order mode and coaxial cavity. Numerical calculation shows that the maximum position of electric field energy of high order mode resonator is distributed on a circle with large radius. In order to obtain high standing wave interaction efficiency, the electron channel is often placed at the maximum electric field energy in engineering design. It means that the multi-beam electron channel is in the side axis position. This configuration will aggravate the interference and influence of the transverse magnetic field on the beam. The transverse magnetic field on the center line of symmetrical focusing magnetic field is the smallest, so in order to reduce the adverse effect of transverse magnetic field and obtain a good laminar flow focusing electron beam, it is necessary to make the symmetry center of the focusing field coincide with the electron beam axis as far as possible. The design of a dual-mode multi-beam klystron electron optical system is of great significance to the development of related projects and the expansion of the use of hollow beam electron gun. It is a good aided design method. However, in terms of computing resources and time consuming, it is not very economical to simulate and analyze the whole multi-beam electron optical system by using the three-dimensional electronic optical simulation software. Therefore, the multi-beam system is simplified to a single-beam system. It is a simple and convenient indirect design method to use two-dimensional software to simulate. In this paper, we take the electron optical system of 75kW dual-mode multi-beam klystron in X-band as the research object, and carry on the example simulation and analysis, in order to design the electron optics system which satisfies the multi-beam klystron project. In the design, a preliminary design scheme and a simulation scheme for the klystron multi-beam electron optics system are put forward, and then the programming calculation and comparison of the three types of single beam electron gun designed are carried out by using TAU two-dimensional electron optics simulation software. It provides a reference for the selection of electron gun. The magnetic focusing system is modeled and simulated by MAXWELL electromagnetic simulation software, and the influence of transverse field is analyzed. Finally, the multi-beam electron optical system is simulated by using three-dimensional simulation software MTSS and compared with the single injection calculation of TAU. Both of them meet the design requirements. It is shown that it is feasible to simplify the multi-injection system into a single injection system.
【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】：2016
【分類號(hào)】：TN122

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