Calibration of the Amplitude-Frequency Characteristic of the Schottky detector system at CSRe

Schottky mass spectrometry utilizing heavy-ion storage rings is a powerful technique for the precise mass and decay half-life measurements of highly charged ions. Because of their intrinsic amplitude-frequency characteristic (AFC), Schottky detector systems exhibit varying sensitivities at different frequencies. Using low-energy electron-cooled stored ions, a new method is developed to calibrate the AFC curve of the Schottky detector system of the Cooler Storage Ring (CSRe) storage ring located in Lanzhou, China. The data recorded the electron-cooled 56Fe26+ ions at an energy of 13.6 MeV/u to measure the AFC curve within the 3 MHz bandwidth around the resonant frequency of the Schottky detector system at CSRe.