现代电子技术
現代電子技術
현대전자기술
MODERN ELECTRONICS TECHNIQUE
2015年
4期
114-117
,共4页
速调管%电子回流%收集极%回流抑制
速調管%電子迴流%收集極%迴流抑製
속조관%전자회류%수집겁%회류억제
klystron%electron returning%collector%returning restrain
为了分析解决7腔23注相对论速调管模拟过程中出现的收集极电子回流现象，解析该现象产生的物理原因，这里利用CHIPIC软件从收集极结构、输出腔距离收集极长度、聚集磁场强度三个方面研究其参数与电子回流量的关系。通过多次模拟实验得到以下结论：收集极入口处及其内表面紧贴电子运动轨迹时，回流减小；输出腔距离收集极长度L>12 mm时，回流随L减小而减小，L=12 mm时，回流量达到最小值，L<12 mm后，回流又逐渐增加；从输出腔下游开始沿z向逐步降低聚集磁场强度，回流现象减弱。最后根据以上分析选择适合的参数，对整管进行模拟，电子注电压为28 kV，总电流43 A，输入信号功率61 W，频率5.6 GHz，获得功率为346.5 kW，平均效率约28.8%，增益37.54 dB的稳定输出信号，且无反射电子回流。证明在保证输出信号增益与效率的前提下，该方法成功抑制了速调管收集极回流现象。
為瞭分析解決7腔23註相對論速調管模擬過程中齣現的收集極電子迴流現象，解析該現象產生的物理原因，這裏利用CHIPIC軟件從收集極結構、輸齣腔距離收集極長度、聚集磁場彊度三箇方麵研究其參數與電子迴流量的關繫。通過多次模擬實驗得到以下結論：收集極入口處及其內錶麵緊貼電子運動軌跡時，迴流減小；輸齣腔距離收集極長度L>12 mm時，迴流隨L減小而減小，L=12 mm時，迴流量達到最小值，L<12 mm後，迴流又逐漸增加；從輸齣腔下遊開始沿z嚮逐步降低聚集磁場彊度，迴流現象減弱。最後根據以上分析選擇適閤的參數，對整管進行模擬，電子註電壓為28 kV，總電流43 A，輸入信號功率61 W，頻率5.6 GHz，穫得功率為346.5 kW，平均效率約28.8%，增益37.54 dB的穩定輸齣信號，且無反射電子迴流。證明在保證輸齣信號增益與效率的前提下，該方法成功抑製瞭速調管收集極迴流現象。
위료분석해결7강23주상대론속조관모의과정중출현적수집겁전자회류현상，해석해현상산생적물리원인，저리이용CHIPIC연건종수집겁결구、수출강거리수집겁장도、취집자장강도삼개방면연구기삼수여전자회류량적관계。통과다차모의실험득도이하결론：수집겁입구처급기내표면긴첩전자운동궤적시，회류감소；수출강거리수집겁장도L>12 mm시，회류수L감소이감소，L=12 mm시，회류량체도최소치，L<12 mm후，회류우축점증가；종수출강하유개시연z향축보강저취집자장강도，회류현상감약。최후근거이상분석선택괄합적삼수，대정관진행모의，전자주전압위28 kV，총전류43 A，수입신호공솔61 W，빈솔5.6 GHz，획득공솔위346.5 kW，평균효솔약28.8%，증익37.54 dB적은정수출신호，차무반사전자회류。증명재보증수출신호증익여효솔적전제하，해방법성공억제료속조관수집겁회류현상。
To eliminate electrons returning from collector of seven?cavity circuit for a 23?beam klystron,and analyze rea?sons of the phenomenon,the software CHIPIC is used to study the relationship of its parameters and electron returning quantity in the espacts of collector structure,distance of output cavity to collector and magnetic field intensity. It is found that,when the collector inlet and inner surface is closed to the electron beam motion trail,the returning electrons tend to decrease;when the length L between output cavity and collector is more than 12 mm,returning electrons reduce with the decrease of L;while L is 12 mm,electron returning quantity is minimum value;when L<12 mm,returning electrons increase. Along with Z direction starting from downstream of output cavity,magnetic field intensity decreases gradually,and the electron returning phenomenon turns weak. Finally,when choosing the suitable parameters(electron beam voltage is 28 kV,input signal power is 61 W,fre?quency is 5.6 GHz)to simulate shielded tube,the power of 346.5 kW,average efficiency of 28.8% and stable output signal of 37.54 dB are obtained,and there is no returning electrons. It prove that,in the precondition to ensure the gain and efficiency of output signal,the method can restrain electron returning phenomenon from collector successfully.
