W波段永磁包裝高次諧波潘尼管的研究
發(fā)布時間：2018-08-23 11:46
【摘要】：回旋管是毫米波波段最有發(fā)展前途的中、高功率、高效率器件之一,高功率回旋管成功地應用于核聚變等離子體回旋諧振加熱中,同時回旋管在毫米波陶瓷燒結、材料加工、毫米波通信、毫米波武器(主動拒止系統(tǒng))以及高分辨率雷達方面有著廣泛的應用前景。短毫米波回旋管的嚴重不足是必須要使用超導磁體,由于其價格昂格,系統(tǒng)復雜,啟動時間長,限制了回旋管在很多情況下的應用效果。潘尼管是另一類還未充分研究、應用的回旋器件,大量研究表明,它具有效率高,可高次諧波工作,因此具有可以實現(xiàn)永磁包裝而不用超導磁體的潛在優(yōu)勢受到人們的高度重視。目前日本學者研制的潘尼管獲得了W波段的微波輻射,美國學者也有研制Ka波段實用潘尼管的詳細計劃和實驗結果,但是目前都還沒有研制W波段實用樣管的報道。近幾年來,電子科技大學強輻射實驗也開展了潘尼管的研究,進行了Ka波段3次諧波潘尼管的設計和大回旋電子槍的探索。根據(jù)對需求背景和可能性的分析,決定以研制W波段10kW量級的永磁包裝潘尼管作為實驗室的近期任務,同時該項目也受到國家自然科學基金的大力支持。本文以研制W波段10kW量級永磁包裝潘尼管器件為目標,對器件總體方案的選擇,注波互作用系統(tǒng)的理論分析與設計,永磁系統(tǒng)的設計,電子光學系統(tǒng)的設計,冷、熱測系統(tǒng)設計和測試方法進行了系統(tǒng)深入的研究,實際加工了高頻腔體并進行了冷測實驗,得到了與理論計算基本符合的結果。在潘尼管總體方案選擇上,兼顧永磁材料性能與器件效率,提出了6次諧波永磁包裝磁控型潘尼管方案。高次諧波潘尼管主要是深入研究7開槽諧振腔中的模式競爭問題,證明其6次諧波2π模單模穩(wěn)定工作的可能性,設計了相應的諧振腔并進行了器件的PIC全電磁粒子模擬,給出了功率達30k W,效率達40%的W波段6次諧波潘尼管參量設計。同時編制潘尼管的自洽非線性大信號計算程序,并用以深入研究了引導中心偏移、速度離散等因素對潘尼管性能的影響,表明在引導中心偏移不大于8%,相對縱向速度離散不大于8%,該器件的功率仍可達10千瓦,效率為17%,從而確定了W波段實用潘尼管對電子束質量的最低要求。潘尼管永磁包裝系統(tǒng)研究了利用現(xiàn)已掌握徑向極化永磁體技術制作潘尼管所需永磁體的可行性,并設計了一個結構緊湊的永磁體,雖然其磁場分布有缺點,但其特殊緩變倒向磁場和工作均勻區(qū)磁場基本可以分別滿足產生大回旋電子注和實現(xiàn)潘尼管注波互作用的磁場要求。潘尼管大回旋電子槍是在上述永磁體可能得到的磁場分布下,運用一種新的設計理念,設計了適應這種特殊倒向場的大回旋電子槍,據(jù)模擬計算獲得引導中心偏移為5.4%,縱向速度離散為6.9%,橫向速度零散為1.3%,和速度比為2的大回旋電子注,該設計的大回旋電子束完全滿足潘尼管工作的基本要求。論文同時深入研究了這種緊湊型永磁體的特殊磁場下電子注的流通規(guī)律,提出了在工作情況下監(jiān)測電子槍的工作狀態(tài)和優(yōu)化電子束參量的實用方法。W波段永磁包裝潘尼管測試技術及系統(tǒng)研究主要是對W波段永磁包裝潘尼管進行系統(tǒng)設計,同時分別設計了潘尼管冷測實驗用矩形TE10模式圓波導TE01模式轉換器和圓波導TE01模式矩形TE10模式的診斷耦合腔,以此用來測試潘尼管的Q值以及確定潘尼管的工作模式,所得測試結果與預期基本一致。論文最終設計出W波段永磁包裝高次諧波潘尼管的結構框架,并搭建了W波段永磁包裝潘尼管系統(tǒng)熱測試平臺,整個潘尼管熱測實驗正處于積極的籌備當中。
[Abstract]:Gyrotron is one of the most promising high-power and high-efficiency devices in millimeter wave band. High-power gyrotron has been successfully used in nuclear fusion plasma gyrotron resonance heating. At the same time, gyrotron is used in millimeter wave ceramic sintering, material processing, millimeter wave communication, millimeter wave weapon (active stop system) and high-resolution radar. The shortage of short millimeter wave gyrotron is that it must use superconducting magnet. Because of its high price, complex system and long start-up time, the application effect of gyrotron is limited in many cases. The potential advantages of permanent magnet packaging without superconducting magnets have attracted much attention due to its ability to work in high-order harmonics. At present, Panitrons developed by Japanese scholars have obtained W-band microwave radiation, and American scholars have also made detailed plans and experimental results for developing Ka-band practical panitrons. However, no W-band practical panitrons have been developed yet. In recent years, the strong radiation experiment of the University of Electronic Science and Technology has also carried out the research of the Panitron, carried out the design of the Ka-band third harmonic Panitron and the exploration of the large cyclotron electron gun. This project is supported by the National Natural Science Foundation of China. In this paper, we aim to develop a W-band 10 kW permanent magnet packaged panitron device. We choose the overall scheme of the device, analyze and design the beam-wave interaction system, design the permanent magnet system, design the electronic optical system, design the cold and thermal measurement system and so on. The test method is studied systematically and thoroughly, the high frequency cavity is fabricated and the cold test experiment is carried out, and the results are basically in agreement with the theoretical calculation. In the overall scheme selection of the panitron, the magnetic control panitron with 6th harmonic permanent magnet packaging is proposed, which takes into account both the performance of the permanent magnet material and the efficiency of the device. The mode competition in a 7-Slot resonator is studied in depth to prove the possibility of stable operation of the 6th harmonic 2pi mode. The corresponding resonator is designed and the PIC full electromagnetic particle simulation of the device is carried out. The parameter design of the 6th harmonic Panitron in W-band with power up to 30kW and efficiency up to 40% is given. The large signal calculation program is used to study the influence of the guiding center offset and the velocity dispersion on the performance of the Panitron. The results show that the power of the device can still reach 10 kW and the efficiency is 17%, when the guiding center offset is less than 8% and the relative longitudinal velocity dispersion is less than 8%. The feasibility of using radial polarized permanent magnet technology to make permanent magnet for Panitron has been studied. A compact permanent magnet has been designed. Although its magnetic field distribution has shortcomings, its special slowly varying backward magnetic field and working uniform magnetic field can basically meet the requirements of producing large magnetic field respectively. The magnetic field requirement of the cyclotron beam-wave interaction and the realization of the Pennion beam-wave interaction is described. The large cyclotron electron gun is designed with a new design concept under the possible magnetic field distribution obtained by the above permanent magnet. The guide center deviation is 5.4% and the longitudinal velocity is discrete according to the simulation calculation. A large cyclotron electron beam with a transverse velocity of 1.3% and a velocity ratio of 2 is designed to meet the basic requirements of the Panitron operation. The flow pattern of the electron beam under the special magnetic field of the compact permanent magnet is studied in detail, and the monitoring of the working state of the electron gun is proposed. A practical method to optimize the parameters of electron beam is presented.The testing technology and system of W-band permanent magnet packaged panitron are mainly designed for the system design of W-band permanent magnet packaged panitron. Finally, the paper designs the structure frame of the high-order harmonic Panitron with W-band permanent magnet packaging, and builds the thermal test platform of the W-band permanent magnet packaging Panitron system. The whole Panitron thermal test experiment is being actively prepared. In the middle.
【學位授予單位】：電子科技大學
【學位級別】：博士
【學位授予年份】：2015
【分類號】：TN12
，
本文編號：2198989
[Abstract]:Gyrotron is one of the most promising high-power and high-efficiency devices in millimeter wave band. High-power gyrotron has been successfully used in nuclear fusion plasma gyrotron resonance heating. At the same time, gyrotron is used in millimeter wave ceramic sintering, material processing, millimeter wave communication, millimeter wave weapon (active stop system) and high-resolution radar. The shortage of short millimeter wave gyrotron is that it must use superconducting magnet. Because of its high price, complex system and long start-up time, the application effect of gyrotron is limited in many cases. The potential advantages of permanent magnet packaging without superconducting magnets have attracted much attention due to its ability to work in high-order harmonics. At present, Panitrons developed by Japanese scholars have obtained W-band microwave radiation, and American scholars have also made detailed plans and experimental results for developing Ka-band practical panitrons. However, no W-band practical panitrons have been developed yet. In recent years, the strong radiation experiment of the University of Electronic Science and Technology has also carried out the research of the Panitron, carried out the design of the Ka-band third harmonic Panitron and the exploration of the large cyclotron electron gun. This project is supported by the National Natural Science Foundation of China. In this paper, we aim to develop a W-band 10 kW permanent magnet packaged panitron device. We choose the overall scheme of the device, analyze and design the beam-wave interaction system, design the permanent magnet system, design the electronic optical system, design the cold and thermal measurement system and so on. The test method is studied systematically and thoroughly, the high frequency cavity is fabricated and the cold test experiment is carried out, and the results are basically in agreement with the theoretical calculation. In the overall scheme selection of the panitron, the magnetic control panitron with 6th harmonic permanent magnet packaging is proposed, which takes into account both the performance of the permanent magnet material and the efficiency of the device. The mode competition in a 7-Slot resonator is studied in depth to prove the possibility of stable operation of the 6th harmonic 2pi mode. The corresponding resonator is designed and the PIC full electromagnetic particle simulation of the device is carried out. The parameter design of the 6th harmonic Panitron in W-band with power up to 30kW and efficiency up to 40% is given. The large signal calculation program is used to study the influence of the guiding center offset and the velocity dispersion on the performance of the Panitron. The results show that the power of the device can still reach 10 kW and the efficiency is 17%, when the guiding center offset is less than 8% and the relative longitudinal velocity dispersion is less than 8%. The feasibility of using radial polarized permanent magnet technology to make permanent magnet for Panitron has been studied. A compact permanent magnet has been designed. Although its magnetic field distribution has shortcomings, its special slowly varying backward magnetic field and working uniform magnetic field can basically meet the requirements of producing large magnetic field respectively. The magnetic field requirement of the cyclotron beam-wave interaction and the realization of the Pennion beam-wave interaction is described. The large cyclotron electron gun is designed with a new design concept under the possible magnetic field distribution obtained by the above permanent magnet. The guide center deviation is 5.4% and the longitudinal velocity is discrete according to the simulation calculation. A large cyclotron electron beam with a transverse velocity of 1.3% and a velocity ratio of 2 is designed to meet the basic requirements of the Panitron operation. The flow pattern of the electron beam under the special magnetic field of the compact permanent magnet is studied in detail, and the monitoring of the working state of the electron gun is proposed. A practical method to optimize the parameters of electron beam is presented.The testing technology and system of W-band permanent magnet packaged panitron are mainly designed for the system design of W-band permanent magnet packaged panitron. Finally, the paper designs the structure frame of the high-order harmonic Panitron with W-band permanent magnet packaging, and builds the thermal test platform of the W-band permanent magnet packaging Panitron system. The whole Panitron thermal test experiment is being actively prepared. In the middle.
【學位授予單位】：電子科技大學
【學位級別】：博士
【學位授予年份】：2015
【分類號】：TN12
，
本文編號：2198989
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