Offline data processing from IQT files of Tektronix spectrum analyzer and its application to electron cooling experiment

IQT files, the spectrum data files of Tektronix real-time spectrum analyzer with special structure are found hardly to manipulate in late experimental data processing. The structure and offline processing of IQT files are analyzed, and the signal contrast is mathematically improved in this paper. As an application example in experimental data processing, the longitudinal electron cooling force of an 36Ar18+21.7 MeV/u beam at different ion-electron relative velocity is obtained. This processing method contributes to the offline processing of real-time spectrum data in experiments.