The Tevatron Chromaticity tracker

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Description

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 demodulating 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 ... continued below

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41 pages

Creation Information

Tan, Cheng-Yang & /Fermilab December 1, 2008.

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Description

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 demodulating 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 betatron tune.

Physical Description

41 pages

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  • Report No.: FERMILAB-TM-2422-AD
  • Grant Number: AC02-07CH11359
  • DOI: 10.2172/946542 | External Link
  • Office of Scientific & Technical Information Report Number: 946542
  • Archival Resource Key: ark:/67531/metadc901424

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Office of Scientific & Technical Information Technical Reports

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Creation Date

  • December 1, 2008

Added to The UNT Digital Library

  • Sept. 27, 2016, 1:39 a.m.

Description Last Updated

  • Dec. 2, 2016, 3:21 p.m.

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Tan, Cheng-Yang & /Fermilab. The Tevatron Chromaticity tracker, report, December 1, 2008; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc901424/: accessed August 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.