Improvements in LLRF Control Algorithms and Automation - Desy

More documents

Recommendations

Info

LLRF FSM: Single Pulse Identification What can be obtained from a single pulse (3rd June 04, SP=14, no feedback, no beam) Ideally: Full system identification including non linear behaviour of all subsystems (slow, not completely achieved so far) Loop phase is obtained at the beginning of the pulse Timeconstant gives bandwidth of the cavity, early quench indicator Phase slope at the end of the pulse gives the detuning Slope of feedforwardand probe-phase in combination give detuning at the beginning of the pulse filling time flattop klystron off Evaluation of LO Generation Determination of offsets- and crosstalk parameters. September 7 th 2004 alexander.brandt@desy.de 8/14
LLRF FSM: Adaptive Feedforward (Principles) Vectormodulator HP Amplifier Simple view of the VUV- FELs RF control system + Feedforward FF(t) Set- Point SP(t) . . . •The Feedback suppresses errors wrt. setpoint-table by 1/gain £ Gain - Cavities •Feedforward can further increase the field cavity Error signal: suppressed by 1/gain in closed loop September 7 th 2004 alexander.brandt@desy.de 9/14
Page 1 and 2: Improvements in LLRF Control Algori
Page 3 and 4: Finite State Machines State 1 t21 t
Page 5 and 6: Algorithms (Fast) ”prototyping“
Page 7: Klystron FSM W. Cichalewski, B. Kos
Page 11 and 12: LLRF FSM: Adaptive Feedforward (Alg
Page 13 and 14: LLRF FSM: Exception Handling • Av

Improvements in LLRF Control Algorithms and Automation - Desy

Create successful ePaper yourself

Delete template?

Save as template?