APT功率耦合器的高功率测试
High-Power Testing of the APT Power Coupler
摘要：
对于基线APT（氚加速器生产）直线加速器设计，需要功率耦合器将210 kW的CW RF功率传输到超导腔。这些APT耦合器工作在700 MHz，具有同轴设计和可调节的超导腔耦合。自1999年5月以来，我们一直在室温测试台上测试这种设计的耦合器。我们完成了发射功率和反射功率高达1 MW的测试。我们还测试了耦合器的一部分外导体冷却的液氮。在后一种情况下，我们研究了冷凝气体对耦合器性能的影响。这些测试的结果表明，APT耦合器能够提供超过500千瓦的空腔。我们正在将基线耦合器设计要求提高到420千瓦的传输功率，以利用这一成功的开发。在本文中，我们描述了我们的高功率耦合器的测试结果。
英文摘要：
For the baseline APT (Accelerator Production of Tritium) linac design, power couplers are required to transmit 210-kW of CW RF power to the superconducting cavities. These APT couplers operate at 700 MHz, have a coaxial design and an adjustable coupling to the superconducting cavities. Since May 1999, we have been testing couplers of this design on a room-temperature test stand. We completed tests at transmitted-power and reflected-power conditions up to 1 MW. We also tested the couplers with a portion of the outer conductor cooled by liquid nitrogen. Under this latter condition, we studied the effects of condensed gases on coupler performance. The results of these tests indicate that the APT couplers are capable of delivering more than 500 kW to the cavities. We are in the process of increasing the baseline coupler design requirement to 420 kW of transmitted power to take advantage of this successful development. In this paper, we describe the results of our high-power coupler tests.
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