In this paper, detailed geometry of the detection chamber, configuration of detection probe laser beams, data acquisition and processing techniques of the cold atoms in Cs atomic fountain primary standard at NPL, India has been discussed. The S/N ratio in the detected atom count was too low to make a valid estimate of signal. By implementing an efficient design of detection hardware (especially changing photodiode with lower junction capacitance) and software, the S/N ratio in NPLI-CsF1 has been improved significantly (~ 10 times). Details of the detection hardware and software used for better processing of the signal are given in this paper. This paper also depicts the precise computer control for data processing and the improvements in signal to noise ratio in the context of fountain operation.

在本文中，讨论了印度NPL的Cs原子喷泉主要标准中检测室的详细几何形状，检测探针激光束的配置，冷原子的数据采集和处理技术。该小号/ Ñ比在检测到的原子数过少，使信号的有效估计。通过实现检测硬件（尤其是具有较低结电容的光电二极管）和软件的高效设计，S / NNPLI-CsF1中的比例显着提高（约10倍）。本文详细介绍了用于更好地处理信号的检测硬件和软件。本文还描述了用于数据处理的精确计算机控制以及在喷泉运行情况下信噪比的改进。