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Synchronization Process PSB example

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Presentation on theme: "Synchronization Process PSB example"— Presentation transcript:

1 Synchronization Process PSB example
Synchronization using a Modulo 360o phase discriminator with adiabatic frequency changes 2/04/2007 Section meeting 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 2/04/2007 Section meeting A. Blas AB/RF/FB

3 Synchronization in the PSB
Start Freq. Beating Start Flat-Top Start Phase Synchro. 2/04/2007 Section meeting 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 2/04/2007 Section meeting 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 2/04/2007 Section meeting 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 2/04/2007 Section meeting A. Blas AB/RF/FB

7 Synchronization with the LEIR type beam control (#2)
No phase transient ! 2/04/2007 Section meeting 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 2/04/2007 Section meeting A. Blas AB/RF/FB


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