基于开路谐振环的电子自旋共振系统设计与表征

骆培文,汪伦,吴喆,张文旭

The Design and Characterization of Electron Spin Resonance Spectrometer Based on Double Split Ring Resonator

LUO Peiwen,WANG Lun,WU Zhe,ZHANG Wenxu

图6 室温下，四个不同质量（m = 0.42、0.72、1.12及1.63 mg）的DPPH粉末样品获得的ESR信号，图中插图为四个ESR信号的峰峰值(a)和信噪比(b).相关测试参数为：微波功率 = 17 dBm，微波频率f = 6.82 GHz，磁场调制频率为999 Hz，锁放时间常数为100 ms，衰减为24 dB/oct，ENBW = 0.78 Hz

Fig. 6 ESR signal of DPPH powder of different quality (m = 0.42, 0.72, 1.12 and 1.63 mg) at room temperature. The peak-to-peak values (a) and SNR (b) of the four ESR signals are illustrated in the figure. Experimental parameters: microwave power =17 dBm, microwave frequency f = 6.82 GHz, magnetic field modulation frequency = 999 Hz, lock-in time constant = 100 ms, roll-off = 24 dB/oct, ENBW = 0.78 Hz