论文标题
开发用于在线湍流反馈实验的宽带AC偏置功率放大器的新型方法
Novel method of developing broad band AC biasing power amplifier for online turbulent feedback experiment in STOR-M tokamak
论文作者
论文摘要
为高频偏见\ cite {kn：deb1}和stor-m tokamak中的实时湍流反馈实验开发了脉冲振荡功率放大器。它能够在频率频段1KHz-50kHz内提供峰值峰值的峰值峰值峰值振荡电压，而电流大约在30a中，而没有任何波形信号的任何变形。总体输出功率通过两个阶段的功率MOSFET运算放大以及九个相同的推杆放大器，这些放大器在最后阶段平行连接。通过Tokamak容器将功率放大器输入信号从等离子体射击过程中从等离子体浮动电位收集的功率输入信号进行实时反馈实验。在这里，在5kHz-40kHz之间具有带宽的过滤浮动电势波动已被放大并馈入插入等离子体边缘的电极以研究血浆湍流的响应。据观察，由于浮动电势的实时反馈，磁波会被抑制。
A pulsed oscillating power amplifier has been developed for high frequency biasing\cite{kn:deb1} and real time turbulent feedback experiment in STOR-M tokamak. It is capable to provide output peak to peak oscillating voltage of around $\pm60$V and current around 30A within frequency band 1kHz-50kHz without any distortion of any waveform signal. Overall output power is amplified by two stages power mosfet op-amp as well as nine identical push-pull amplifiers which are parallel connected in final stages. The power amplifier input signal, collected from plasma floating potential during plasma shot, is optically isolated with tokamak vessel for real time feedback experiment. Here, filtered floating potential fluctuations having band width between 5kHz-40kHz has been amplified and fed to an electrode inserted into the plasma edge to study response of plasma turbulence. It is observed that magnetic fluctuations are suppressed due to real time feedback of floating potential.
