PCaPAC2012 - List of Authors (Chakrabarti, A.)

Paper

Title

Page

Simulation Analysis of Analog IQ based LLRF Control of RF Cavity

225

S. Basak, A. Chakrabarti, H.K. Pandey
VECC, Kolkata, India

This paper presents the simulation analysis and results in Matlab Simulink of the analog Inphase-Quadrature (IQ) based LLRF control of RF cavity voltage. The RF cavity parameters were selected to be one of the RF cavities in our RIB project. All the subsystems in the IQ based RF control were modeled using the Simulink blocks/components. The envelope simulation was carried out using the IQ model of RF cavity. The PI controller was properly tuned to achieve good control performance in time. The simulation graphs showing the time evolution of the RF cavity voltage with a step changes of the input reference signal is presented. The simulation graphs showing the control response time needed to correct a disturbance is presented. Further the effects of beam currents (if not ignored) on the cavity voltage can been studied through the simulation graphs. The simulation results showing the amplitude and phase Bode/Nichols plots of the control loop and the gain and phase margin values obtained from them are presented, which are good enough for stability. Thus the control simulation RF cavity voltage is done in Simulink and the results obtained are presented.

Poster THPD46 [0.222 MB]

Paper	Title	Page
THPD46	Simulation Analysis of Analog IQ based LLRF Control of RF Cavity	225
	S. Basak, A. Chakrabarti, H.K. Pandey VECC, Kolkata, India
	This paper presents the simulation analysis and results in Matlab Simulink of the analog Inphase-Quadrature (IQ) based LLRF control of RF cavity voltage. The RF cavity parameters were selected to be one of the RF cavities in our RIB project. All the subsystems in the IQ based RF control were modeled using the Simulink blocks/components. The envelope simulation was carried out using the IQ model of RF cavity. The PI controller was properly tuned to achieve good control performance in time. The simulation graphs showing the time evolution of the RF cavity voltage with a step changes of the input reference signal is presented. The simulation graphs showing the control response time needed to correct a disturbance is presented. Further the effects of beam currents (if not ignored) on the cavity voltage can been studied through the simulation graphs. The simulation results showing the amplitude and phase Bode/Nichols plots of the control loop and the gain and phase margin values obtained from them are presented, which are good enough for stability. Thus the control simulation RF cavity voltage is done in Simulink and the results obtained are presented.
	Poster THPD46 [0.222 MB]