Measurement of tune spread in the Tevatron versus octupole strength

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Description

An experiment was performed in the Tevatron to measure the tune spread versus octupole strength. The experiment is sensitive to the relationship between octupole strength and current in the T:OZF circuit and to the octupole (and other non-linear focusing fields) in the Tevatron. The major motivation for the experiment was to determine the value of octupole excitation that minimizes the tune spread: this value is an estimate of the value required to obtain ''zero'' total octupole excitation in the extraction process. The experiment was performed using the strip-line kickers at A17 and the resonant Schottky pickups. The horizontal proton kicker ... continued below

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8 pages

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Marriner, John; Martens, Mike & /Fermilab August 1, 1996.

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Description

An experiment was performed in the Tevatron to measure the tune spread versus octupole strength. The experiment is sensitive to the relationship between octupole strength and current in the T:OZF circuit and to the octupole (and other non-linear focusing fields) in the Tevatron. The major motivation for the experiment was to determine the value of octupole excitation that minimizes the tune spread: this value is an estimate of the value required to obtain ''zero'' total octupole excitation in the extraction process. The experiment was performed using the strip-line kickers at A17 and the resonant Schottky pickups. The horizontal proton kicker was excited with a sine-wave from a vector signal analyzer (HP-89440A) and the horizontal proton signal was received. The gating circuitry normally used to select proton or antiproton bunches was by-passed. The response function was measured and recorded on a floppy disk. Measurements were initially made with a 200 Hz span (0.250 Hz frequency bins) and later with a 100 Hz span (0.125 Hz frequency bins).

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8 pages

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  • Report No.: FERMILAB-EXP-199
  • Grant Number: AC02-76CH03000
  • DOI: 10.2172/15017295 | External Link
  • Office of Scientific & Technical Information Report Number: 15017295
  • Archival Resource Key: ark:/67531/metadc1411713

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Office of Scientific & Technical Information Technical Reports

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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Creation Date

  • August 1, 1996

Added to The UNT Digital Library

  • Jan. 23, 2019, 12:54 p.m.

Description Last Updated

  • Feb. 7, 2019, 1:18 p.m.

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Marriner, John; Martens, Mike & /Fermilab. Measurement of tune spread in the Tevatron versus octupole strength, report, August 1, 1996; Batavia, Illinois. (https://digital.library.unt.edu/ark:/67531/metadc1411713/: accessed March 24, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.