1. Measurement of the lifetime and the proportion of 12C3+ ions in stored relativistic ion beams as a preparation for laser cooling experiments at the CSRe
- Author
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Wang, H. B., Wen, W. Q., Huang, Z. K., Zhang, D. C., Hai, B., Zhu, X. L., Zhao, D. M., Yang, J., Li, J., Li, X. N., Mao, L. J., Mao, R. S., Wu, J. X., Yang, J. C., Yuan, Y. J., Eidam, L., Winters, D., Beck, T., Kiefer, D., Rein, B., Walther, T., Loeser, M., Schramm, U., Siebold, M., Bussmann, M., and Ma, X.
- Subjects
Laser cooling ,Electron cooling ,Schottky pick-up ,dynamics ,Storage ring ,bunched beam - Abstract
We report on an experiment that was conducted in preparation of laser cooling experiments at the heavy-ion storage ring CSRe. The lifetimes of ion beams made up of 12C3+ and 16O4+ ions stored at an energy of 122MeV/u in the CSRe were determined by two independent methods, firstly via a DC current transformer (DCCT) and secondly via a Schottky resonator. Using electron-cooling, the signals of the 12C3+ and 16O4+ ions could be separated and clearly observed in the Schottky spectrum. The obtained individual lifetimes of the 12C3+ and 16O4+ components were 23.6s and 17.8s, respectively. The proportion of 12C3+ ions in the stored ion beam was measured to be more than 70% at the beginning of the injection and increasing as a function of time. In addition to these measurements, the operation and remote control of a pulsed laser system placed directly next to the storage ring was tested in a setup similar to the one envisaged for future laser experiments.
- Published
- 2017