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Zheng, Q.

Paper Title Page
WEPMN002 Tuner Control in TRIUMF ISAC 2 Superconducting RF System 2047
  • K. Fong, M. P. Laverty, Q. Zheng
    TRIUMF, Vancouver
  The TRIUMF ISAC 2 superconducting RF system operates on self-excited, phase locking mode. A mechanical tuner is used to minimize the required RF power. The tuner derives the tuning information from the phase shift around the self-excited loop. Its accuracy is however reduced by phase drift in the amplifier due to thermal effects. Cross correlation between the In-phase and the Quadrature-phase errors is used to detect this drift. A Kalman filter is used to combine these information to control the movement of the tuner.