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首页> 外文期刊>Physical Review. Accelerators and Beams >Compact rf polarizer and its application to pulse compression systems
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Compact rf polarizer and its application to pulse compression systems

机译：紧凑型射频偏振器及其在脉冲压缩系统中的应用

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We present a novel method of reducing the footprint and increasing the efficiency of the modern multi-MW rf pulse compressor. This system utilizes a high power rf polarizer to couple two circular waveguide modes in quadrature to a single resonant cavity in order to replicate the response of a traditional two cavity configuration using a 4-port hybrid. The 11.424 GHz, high-Q, spherical cavity has a 5.875 cm radius and is fed by the circularly polarized signal to simultaneously excite the degenerate $T{E}_{114}$ modes. The overcoupled spherical cavity has a ${Q}_{0}$ of $9.4ifmmodeimeselseexttimesi{}{10}^{4}$ and coupling factor ($ensuremath{eta}$) of 7.69 thus providing a loaded quality factor ${Q}_{L}$ of $1.06ifmmodeimeselseexttimesi{}{10}^{4}$ with a fill time of 150 ns. Cold tests of the polarizer demonstrated good agreement with the numerical design, showing transmission of $ensuremath{-}0.05ext{ }ext{ }mathrm{dB}$ and reflection back to the input rectangular WR 90 waveguide less than $ensuremath{-}40ext{ }ext{ }mathrm{dB}$ over a 100 MHz bandwidth. This novel rf pulse compressor was tested at SLAC using XL-4 Klystron that provided rf power up to 32 MW and generated peak output power of 205 MW and an average of 135 MW over the discharged signal. A general network analysis of the polarizer is discussed as well as the design and high power test of the rf pulse compressor.
机译：我们提出了一种减少占地面积并提高现代多兆瓦级射频脉冲压缩机效率的新颖方法。该系统利用高功率射频偏振器将正交的两个圆形波导模式耦合到单个谐振腔，以便复制使用4端口混合器的传统两个腔配置的响应。 11.424 GHz高Q球形腔的半径为5.875厘米，并由圆极化信号馈电，以同时激发简并的$ T {E} _ {114} $模式。过度耦合的球腔的$ {Q} _ {0} $为$ 9.4 ifmmode times else texttimes fi {} {10} ^ {4} $，耦合因子为（$ ensuremath { beta} $）因此，使用7.69的结果提供了质量为$ 1.06的加载质量因数$ {Q} _ {L} $ ifmmode times else texttimes fi {} {10} ^ {4} $，填充时间为150 ns。偏光镜的冷测试表明其与数值设计具有良好的一致性，显示$ ensuremath {-} 0.05 text {} text {} mathrm {dB} $的透射率和反射回输入矩形WR 90波导的反射率小于$ ensuremath {-} 40 text {} text {} mathrm {dB} $（在100 MHz带宽上）。这款新颖的RF脉冲压缩器在XLAC上使用XL-4 Klystron在SLAC上进行了测试，其提供的RF功率高达32 MW，产生的峰值输出功率为205 MW，平均放电信号为135 MW。讨论了偏振器的一般网络分析，以及射频脉冲压缩机的设计和高功率测试。

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