An Investigation of low beta triplet vibrational issues at Fermilab's Collider Detector

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The vibrational aspects of recent disturbances at the low beta focusing quadrupoles, which caused proton beam loss at the Collider Detector at Fermilab (CDF), are discussed. Two low beta focusing quadrupoles are supported by a girder, which is extended over the CDF collision hall pit on each side. The low beta girder has a ledge mount support at an alcove's face and two Invar rods near the opposite end. Forced response measurements were taken on the low beta girder, where the power spectral density (PSD) function was used to obtain RMS displacement. The effects of local excitation due to operating ... continued below

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682 Kilobytes pages

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McGee, Michael W. June 8, 2004.

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The vibrational aspects of recent disturbances at the low beta focusing quadrupoles, which caused proton beam loss at the Collider Detector at Fermilab (CDF), are discussed. Two low beta focusing quadrupoles are supported by a girder, which is extended over the CDF collision hall pit on each side. The low beta girder has a ledge mount support at an alcove's face and two Invar rods near the opposite end. Forced response measurements were taken on the low beta girder, where the power spectral density (PSD) function was used to obtain RMS displacement. The effects of local excitation due to operating equipment and near-field excitation due to ambient ground motion caused by local traffic are examined. The discussion explores dynamic response characteristics of the low beta quadrupoles and supporting girder using beam loss as the vibrational stability criteria. This paper also presents practical problem-solving approaches for similar accelerator components.

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682 Kilobytes pages

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  • MEDSI 2004, Grenoble (FR), 05/23/2004

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  • Report No.: FERMILAB-Conf-04/076-AD
  • Grant Number: AC02-76CH03000
  • Office of Scientific & Technical Information Report Number: 824999
  • Archival Resource Key: ark:/67531/metadc781486

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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.

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  • June 8, 2004

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  • Dec. 3, 2015, 9:30 a.m.

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  • April 1, 2016, 4:12 p.m.

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McGee, Michael W. An Investigation of low beta triplet vibrational issues at Fermilab's Collider Detector, article, June 8, 2004; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc781486/: accessed January 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.