论文标题
在高功率操作下的4频RFQ加速器的耦合多物理分析
Coupled multiphysics analysis of a 4-vane RFQ accelerator under high power operation
论文作者
论文摘要
4个射频射频四极杆（RFQ）的辐射谐音谐振四质子机械结构具有高质量的因子和狭窄的带宽，从而导致对高功率操作下的热膨胀引起的频率失谐的高灵敏度，因此频率误差的最小化和提供动态调节的最小化是非常重要的设计问题。在这里，我们描述了一种优化方法，以找出适合以稳定状态的4个Vane RFQ的冷却设计。此外，我们研究了加速器在瞬态热分析中的反应，这可以有助于指导调试和降低频率失调。最近开发的176 MHz 4-Vane RFQ用于CST和ANSYS使用的多物理分析是一个例子。当达到80 kV的车间电压时，此RFQ将耗散211 kW，这是80 ma质子从65 keV加速到5.3米的2.5 meV所必需的。
The radiofrequency resonant four-quadrant mechanical structure of a 4-vane Radio Frequency Quadrupole (RFQ) has a high quality factor and narrow bandwidth, resulting in high sensitivity to frequency detuning caused by thermal expansion under high power operation, so minimization of frequency errors and affording dynamic tuning are very important design issues. Here we describe an optimization approach to figure out a suitable cooling design for a 4-vane RFQ in steady state. Besides, we investigate how the accelerator responds in transient thermal analysis that could help to guide commissioning and reduce frequency detuning. Multiphysics analysis utilized with CST and ANSYS for a recently developed 176 MHz 4-vane RFQ is taken as an example. This RFQ will dissipate 211 kW when reaching an inter-vane voltage of 80 kV, which is required for an acceleration of an 80-mA proton from 65 keV to 2.5 MeV in 5.3 meters.
