Speaker
Mr
John Musson
(Jefferson Lab)
Description
Superconducting Accelerators, worldwide, are appealing to digital Low-Level RF
(LLRF)
control systems in order to achieve high-precision RF gradient and phase regulation,
typically less than 0.1% and 0.01 degrees, respectively.
Although mostly digital, these high-performance systems still rely on analog
front-end receiver components for down-conversion, amplification, and pre-filtering.
The linearity aspects of digital and numerical stages are undisputed, but in most
cases, the effects of non-linear signal corruption within the analog RF components
are not easily corrected, and can ultimately limit the system performance.
Therefore,
special design efforts are required to achieve ultra-linear performance, while
controlling dynamic range, sensitivity, power consumption, and cost.
This discussion presents some of the non-linear front-end parameters, and
quantitatively relates them to system specifications. In addition, techniques used
to
predict, measure and quantify these effects are presented.
Author
Mr
John Musson
(Jefferson Lab)
