A 27.12-MHz 10-kV Power Amplifier for Compact Particle Accelerators Utilizing an Optimized
A 27.12-MHz 10-kV Power Amplifier for Compact Particle Accelerators Utilizing an Optimized
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用于紧凑型粒子加速器的 27.12MHz 10kV 功率放大器采用优化的
DOI：
10.1109/ecce44975.2020.9236008
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
K. Afridi
中科院分区：
文献类型：
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作者：
Matching Network;Sreyam Sinha;Yuetao Hou;D. Ni;Q. Ji;A. Persaud;P. Seidl;T. Schenkel;A. Lal;K. Afridi
本文介绍了一种适用于小型粒子加速器中离子束推进的27.12MHz 10kV开关功率放大器。离子束通过一系列由高频交流电压驱动的加速单元被加速到高能量水平。这些高电压通过利用包括全桥逆变器和高增益匹配网络的功率放大器来产生。提出了一种匹配网络拓扑结构，可降低逆变器晶体管上的电流应力，提高放大器的热可靠性，特别是在高频工作期间。与先前提出的功率放大器相比，基于所提出的匹配网络的功率放大器还实现了更低的总体损耗。一个全面的方法，提出了建议的匹配网络的设计，最大限度地减少在功率放大器的整体损耗，同时确保逆变器晶体管的软开关。一个27.12 MHz的原型功率放大器与匹配网络设计使用所提出的方法被证明产生高达10 kV的输出电压，同时保持逆变器的损失在所需的限制。
This paper introduces a 27.12-MHz 10-kV switch-mode power amplifier suitable for propelling ion beams in compact particle accelerators. Ion beams are accelerated to high energy levels by passing them through a series of acceleration cells driven by large high-frequency ac voltages. These high voltages are generated by utilizing power amplifiers that comprise a full-bridge inverter and a high-gain matching network. A matching network topology is proposed that reduces the current stress on the inverter transistors, increasing the amplifier’s thermal reliability, especially during high frequency operation. Power amplifiers based on the proposed matching network also achieve lower overall losses compared to previously presented power amplifiers. A comprehensive methodology is presented for the design of the proposed matching network that minimizes the overall losses in the power amplifier while ensuring soft-switching of the inverter transistors. A 27.12-MHz prototype power amplifier with a matching network designed using the proposed approach is demonstrated to generate up to 10 kV output voltage while maintaining the inverter losses within a desired limit.