Accurate measurements of cold atomic cloud with area fit method

We propose a scheme for accurately determining the number and the temperature of cold atomic cloud by the area fit, which is more accurate than former Gaussian fit method and can be used mostly when the cloud takes a shape that cannot be accurately captured using common Gaussian fit. We have realized measurements of cold atomic cloud with area fit. The number of trapped atoms is about 108 and the temperature estimated with the analysis is about 328 μK after 2 s loading.