Chromaticity tracking using a phase modulation technique

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In the classical chromaticity measurement technique, chromaticity is measured by measuring the change in betatron tune as the RF frequency is varied. This paper will describe a novel way of measuring chromaticity: we will phase modulate the RF with a known sine wave and then phase demodulate the betatron frequency. The result is a line in Fourier space which corresponds to the frequency of our sine wave modulation. The peak of this sine wave is proportional to chromaticity. For this technique to work, a tune tracker PLL system is required because it supplies the betatron carrier frequency. This method has ... continued below

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3 pages

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Tan, C.Y. June 1, 2007.

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Description

In the classical chromaticity measurement technique, chromaticity is measured by measuring the change in betatron tune as the RF frequency is varied. This paper will describe a novel way of measuring chromaticity: we will phase modulate the RF with a known sine wave and then phase demodulate the betatron frequency. The result is a line in Fourier space which corresponds to the frequency of our sine wave modulation. The peak of this sine wave is proportional to chromaticity. For this technique to work, a tune tracker PLL system is required because it supplies the betatron carrier frequency. This method has been tested in the Tevatron and we will show the results here.

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3 pages

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  • Presented at Particle Accelerator Conference (PAC 07), Albuquerque, New Mexico, 25-29 Jun 2007

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  • Report No.: FERMILAB-CONF-07-195-AD
  • Grant Number: AC02-07CH11359
  • Office of Scientific & Technical Information Report Number: 917092
  • Archival Resource Key: ark:/67531/metadc885338

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Office of Scientific & Technical Information Technical Reports

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  • June 1, 2007

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  • Sept. 22, 2016, 2:13 a.m.

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  • Sept. 25, 2017, 8:11 p.m.

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Tan, C.Y. Chromaticity tracking using a phase modulation technique, article, June 1, 2007; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc885338/: accessed December 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.