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Some signal samples acquired from Schottky probes and beam position monitor during operation were presented in this paper, and they were observed in the different operation stages such as during injection, after cooling and cooling force measurement. These signals were considered related with the ion beam instability. The central frequency of ion beam varied with the time. Some were caused by the ripple of hardware, the other were created by ion beam itself. The reasons which caused these phenomena were analyzed. The possible solutions were suggested, and some necessary upgrade and improvements were expected. These results were helpful to attempt the Schottky Mass Spectrometry measurement in the CSR.

Beam instability phenomena observed at HIRFL-CSR in the presence of electron cooler