Chromaticity control in the Fermilab Main Injector

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Chromaticity control in the Fermilab Main Injector will be important both in accelerating protons and antiprotons from 8 GeV to 150 GeV (or 120 GeV) and in decelerating recycled 150 GeV antiprotons to 8 GeV for storage in the Recycler Ring. The Main Injector has two families of sextupoles to control the chromaticity. In addition to the natural chromaticity, they must correct for sextupole fields from ramp-rate-dependent eddy currents in the dipole beampipes and current-dependent sextupole fields in the dipole magnets. The horizontal sextupole family is required to operate in a bipolar mode below the transition energy of 20 GeV. ... continued below

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78 Kilobytes

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al., G. Wu et April 16, 1999.

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Chromaticity control in the Fermilab Main Injector will be important both in accelerating protons and antiprotons from 8 GeV to 150 GeV (or 120 GeV) and in decelerating recycled 150 GeV antiprotons to 8 GeV for storage in the Recycler Ring. The Main Injector has two families of sextupoles to control the chromaticity. In addition to the natural chromaticity, they must correct for sextupole fields from ramp-rate-dependent eddy currents in the dipole beampipes and current-dependent sextupole fields in the dipole magnets. The horizontal sextupole family is required to operate in a bipolar mode below the transition energy of 20 GeV. We describe methods used to control chromaticities in the Fermilab Main Injector. Emphasis is given to the software implementation of the operator interface to the front-end ramp controllers. Results of chromaticity measurements and their comparison with the design model will be presented.

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78 Kilobytes

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  • Particle Accelerator Conference, PAC99, New York, New York, March 29-April 2, 1999

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  • Other: DE00005801
  • Report No.: FERMILAB-Conf-99/074
  • Grant Number: NONE
  • Office of Scientific & Technical Information Report Number: 5801
  • Archival Resource Key: ark:/67531/metadc690042

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Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • April 16, 1999

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  • Aug. 14, 2015, 8:43 a.m.

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  • April 18, 2016, 2:34 p.m.

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al., G. Wu et. Chromaticity control in the Fermilab Main Injector, article, April 16, 1999; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc690042/: accessed January 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.