CLOSED LOOP RF TUNING FOR SUPERCONDUCITNG CYCLOTRON AT VECC

CORC > 近代物理研究所 > 中国科学院近代物理研究所 > 近代物理研究所知识存储（2010之前）

	CLOSED LOOP RF TUNING FOR SUPERCONDUCITNG CYCLOTRON AT VECC
	Aditya Mandal ; S. Som ; S.Saha ; Saikat Paul ; S.Seth ; R.K. Bhandari ; P.R. Raj ; B.C.Mandal ; B.K.Das ; U.Panda & RF group
	2010-09-10
会议日期	2010-09-06
会议地点	兰州
英文摘要	The RF system of Superconducting cyclotron has been operational within 9 - 27 MHz frequency. It has three tunable half-wave coaxial cavities as main resonators and three tunable RF amplifier cavities. A PC-based system takes care of stepper motor driven coarse tuning of cavities with positional accuracy ~20μm and hydraulically driven three couplers and three trimmers. The couplers, in open loop, match the cavity impedance to 50 Ohm in order to feed power from RF amplifier. Trimmers operate in closed loop for fine tuning the cavity, if detuned thermally at high RF power. The control logic has been simulated and finally implemented with Programmable Logic Controller (PLC). Precision control of trimmer (~20μm) is essential to achieve the accelerating (Dee) voltage stability better than 100 ppm. and also minimizing the RF power to maintain it. Phase difference between Dee-in and Dee-pick-off signals and the reflected power signals (from cavity) together act in closed loop for fine tuning of the cavity. The closed loop PID control determines the final positioning of the trimmer in each power level and achieved the required voltage stability.
会议录	The 19th International Conference on Cyclotrons and their Applications, CYCLOTRONS'18
资助机构	IMP;Chinese Academy of Sciences
语种	英语
URL标识	查看原文
内容类型	会议论文
源URL	[http://ir.imp.cas.cn/handle/113462/8535]
专题	近代物理研究所_近代物理研究所知识存储（2010之前）
推荐引用方式 GB/T 7714	Aditya Mandal,S. Som,S.Saha,et al. CLOSED LOOP RF TUNING FOR SUPERCONDUCITNG CYCLOTRON AT VECC[C]. 见:. 兰州. 2010-09-06.