Primary attempt for simulating feedback system of low frequency
In order to improve the accumulation of the injected beam, it is necessary to restrain β oscillation caused by injected system error. This thesis systematically introduces the research of injection beam instability, the design principle and circuit of the feedback system for restraining the injected β oscillation of HLS using the turn by turn system. Meanwhile, it also provides the result of preliminary experiments. A relatively simple analog filter and phase shifter is used to counteract the β oscillation caused in kicker course. From experiment result, it is of obvious restraining effect. All of these are helpful for further development of feedback system of bunch-by-bunch and lower frequency in the future, and of the research of vertical and horizontal instability of beam.