标题： MESA 1.3 GHz TESLA 腔的快速反应调谐器设计 显示英文标题

标题： Design of a Fast Reactive Tuner for 1.3 GHz TESLA cavities at MESA

摘要： 这项工作介绍了一种铁电快速反应调谐器（FE-FRT）的最先进设计，能够在微秒时间尺度上对特斯拉型腔进行高无功功率调制。马尔堡能量回收超导加速器采用在1.3 GHz下工作的超导射频腔，其品质因数达到$10^{10}$的数量级。然而，由微声学引起的$\pm$25 Hz失谐导致使用强耦合的基本功率耦合器，需要功率放大器，其功率远高于固有损耗。目前减轻微声学的方法依赖于压电调谐器，但它们的速度不足以应对微声学的频谱范围。一种新的替代方案是FE-FRT，这种技术得益于低损耗铁电材料的发展，能够提供亚微秒响应时间。提供了分析结果，并通过有限元仿真进行了验证。预计FE-FRT能够在这些类型的腔体中处理大量无功功率，提供50 Hz的调谐范围，从而将峰值前向射频功率降低约一个数量级。 显示英文摘要

摘要： This work presents a state-of-the-art design of a Ferroelectric Fast Reactive Tuner (FE-FRT), capable of modulating high reactive power in TESLA type cavities on a microsecond time scale. The Mainz Energy-Recovering Superconducting Accelerator employs superconducting radio frequency cavities operating at 1.3 GHz, achieving quality factors on the order of $10^{10}$. However, detuning of $\pm$25 Hz induced by microphonics have led to the use of strong coupling for the fundamental power coupler, requiring high-power amplifiers, orders of magnitude above the intrinsic dissipation. Current solutions to mitigate microphonics rely on piezoelectric tuners, which are not fast enough for the spectral range of the microphonics. A novel alternative is the FE-FRT, a technology made possible by the development of low-loss ferroelectric materials, which offer sub-microsecond response times. Analytical results are provided along with their validation through finite-element simulations. The FE-FRT is expected to handle substantial reactive power while offering a tuning range of 50 Hz in these type of cavities, resulting in a reduction in peak forward RF power by about an order of magnitude.