【摘要】 1.制成波长为3.2厘米的低頻和高頻双重調場的波譜仪;示波器的灵敏度为3×10^-9克分子DPPH,其分辨本領約为1高斯。 2.微波系統用反射式和传輸式相結合的装置,反射系統用于晶体視頻接收和調諧监。视,传输系統用于接收高頻信号和頻率自动稳定信号,能方便調整仪器至工作状态。 3.利用单线圈伸入H₀₁₁型圓柱形共振腔的方法,只需低功率的高頻調場,并能避免高功率高頻調場的干扰。更多还原

【Abstract】 1. An X-band E. S. R. spectrometer has been constructed. Its sensitivity is such that 3×10^-8 mole of DPPH can be detected by oscilloscope with S/N=15/1. The five byperfine structure lines of 5×10^-4 M/1 DPPH benzene solution have been resolved.2. Both transmission and reflection detecting system are provided. The former is used for the detection of high frequency signal and automatic tuning signal, and the latter for crystal vedio detection and microwave monitoring. This makes it more convenient to set the spectrometer for use.3. A single loop modulation coil used inside the H₀₁₁ type cylindrical cavity is described. Satisfactory modulation can be obtained with a low power high frequency oscillator so that serious interferences due to modulation pick up has been eliminated.更多还原