The Tevatron Chromaticity tracker Page: 1 of 41
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The Tevatron Chromaticity Tracker
ABSTRACT: The Tevatron chromaticity tracker (CT) has been successfully
commissioned and is now operational. The basic idea behind the CT is that when
the phase of the Tevatron RF is slowly modulated, the beam momentum is also
modulated. This momentum modulation is coupled transversely via chromaticity
to manifest as a phase modulation on the betatron tune. Thus by phase demodu-
lating the betatron tune, the chromaticity can be recovered. However, for the phase
demodulation to be successful, it is critical that the betatron tune be a coherent
signal that can be easily picked up by a phase detector. This is easily done because
the Tevatron has a phase locked loop (PLL) based tune tracker which coherently
excites the beam at the the betatron tune.
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Tan, Cheng-Yang. The Tevatron Chromaticity tracker, report, December 1, 2008; Batavia, Illinois. (https://digital.library.unt.edu/ark:/67531/metadc901424/m1/1/: accessed April 23, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.