Linearization of the Fermilab recycler high level RF

In studying the recycler high level RF, it was found that at 89 kHz, the lowest frequency required by the system, some nonlinearities in magnitude and phase were discovered. The visible evidence of this was that beam injected in a barrier bucket had a definite slope at the top. Using a network analy...

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Bibliographic Details
Published inProceedings of the 2003 Particle Accelerator Conference Vol. 2; pp. 1204 - 1206 Vol.2
Main Authors Dey, J., Dris, S., Kubicki, T., Reid, J.
Format Conference Proceeding
LanguageEnglish
Published IEEE 2003
Subjects
Band pass filters
Broadband amplifiers
Chebyshev approximation
Equations
Frequency response
Matched filters
Radio frequency
Radiofrequency amplifiers
Root mean square
Transfer functions
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Summary:In studying the recycler high level RF, it was found that at 89 kHz, the lowest frequency required by the system, some nonlinearities in magnitude and phase were discovered. The visible evidence of this was that beam injected in a barrier bucket had a definite slope at the top. Using a network analyzer, the S-parameter S/sub 21/ was realized for the overall system and from mathematical modeling a second order numerator and denominator transfer function was found. The inverse of this transfer function gives our linearization transfer function. The linearization transfer function was realized in hardware by summing a high pass, band pass and low pass filter together. The resulting magnitude and phase plots, along with actual beam response will be shown.
ISBN:9780780377387
0780377389
ISSN:1063-3928
2152-9647
DOI:10.1109/PAC.2003.1289653