对数比电路原理与低频工作点反馈系统
Logratio circuit and low frequency feedback system
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摘要: 在合肥光源注入系统升级改造后,尝试了几种方法来改进机器注入束流稳定性。研制了用于抑制注入过程残余β振荡的水平和垂直方向的工作点振荡抑制模块,尝试了包括逐圈测量和锁相环原理来激励和稳定束流等方法来跟踪工作点变化。详细分析了基于对数比原理的逐圈测量系统,包括单束团和多束团模式,证明在多束团模式下逐圈测量的可行性和意义,更新了数据采集和可远程控制的软件集成环境。Abstract: During the past year, several measures have been tried to improve the stability of injected beam at HLS (Hefei Light Source), which has newly upgraded its injection system. To overcome the evident residual betatron oscillation, one specific betatronoscillation suppressor circuitry is accomplished to take it under control. Means to excite and damp beam motions has been suggested, as well as a PLL circuit in plan to track the variation of tune under various machine states. In addition, works as improving the performance of early version of turnbyturn system and rebuilding the software kit to make it a reliable instrumentation for beam nonlinear dynamics study and machine state monitoring.
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Key words:
- logratio circuit /
- turnbyturn system /
- circuitry simulation /
- resonant depressor
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