高灵敏度光学多通道分析仪的研究

A High Sensitivity Optical Multichannel Analyzer

分析了光学多通道分析仪的光电探测器件CCD的噪声产生原因,讨论了抑制噪声、提高探测灵敏度的方法。成功地研制了高灵敏度光学多通道分析仪,在常温常压下可清晰分辨氢和氘的第七条巴尔末线系谱线,相比文献中报道过的光学多通道分析仪,灵敏度提高了一个量级以上。该仪器具有高分辨率、高精度以及良好的可靠性。

Noise sources of the CCD as the photoelectric detection device in an optical multichannel analyzer （OMA） were analyzed, and noise suppression methods were discussed. A high sensitivity OMA was developed successfully on the basis of the noise suppression techniques, and the 7^th spectral lines of Balmer series of hydrogen and deuterium were resolved clearly by the OMA. Its sensitivity was enhanced by one order of magnitude, compared with those reported in the literatures. This OMA also showed high resolution, high precision and good reliability in the authors＇ experiments.