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Synchronization Process PSB example

Synchronization Process PSB example. Synchronization using a Modulo 360 o phase discriminator with adiabatic frequency changes. Synchronization Process. Only small frequency steps are tolerated D f small when closing the loop or small loop gain

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Synchronization Process PSB example

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  1. Synchronization ProcessPSB example Synchronization using a Modulo 360o phase discriminator with adiabatic frequency changes A. Blas AB/RF/FB

  2. Synchronization Process • Only small frequency steps are tolerated • Df small when closing the loop • or small loop gain • Avoid the non-linear region of the Phase discriminator when closing the phase synchronization loop • Wait until DF crosses a value far enough from the non-linear point • High loop gain Solution chosen in the PSB: • Impose Df before closing the synchro phase loop • Wait until DF zero crossing to close the loop A. Blas AB/RF/FB

  3. Synchronization in the PSB Start Freq. Beating Start Flat-Top Start Phase Synchro. A. Blas AB/RF/FB

  4. Weaknesses of the PSB synchronization process. • It starts only at the extraction top field when the rf frequency is close enough to the reference value. • It lasts long to be adiabatic A. Blas AB/RF/FB

  5. What signals are available in the LEIR type digital beam control ? Real-time frequency and phase (with respect to the cavity rf) are available for the beam and the reference A. Blas AB/RF/FB

  6. Synchronization with the LEIR type beam control (#1) With this method, the system undergoes a transient at the loop closure A. Blas AB/RF/FB

  7. Synchronization with the LEIR type beam control (#2) No phase transient ! A. Blas AB/RF/FB

  8. Synchronization with the LEIR type beam control (#3) End Setup Start Setup Synchronization can be started any time without transient nor radial steering A. Blas AB/RF/FB

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