Preliminary Statistical Analysis of CEBAF's Cavity Pair Assembly Process Data

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CEBAF has been collecting much data during the cavity pair assembly process. Some process data has been entered and analyzed during the last two years as part of our attempt to apply statistical process control methods. Analysis is presented here on mechanical tolerances achieved by the industrial fabricator of the CEBAF superconducting rf cavities (Siemens). Suggestions for tolerances obtainable in future procurements are made. Influence of cooldown conditions during vertical test on field emission onset gradient is discussed. An increase in the mean gradient of 2 MV/m was seen after a simple change in procedure.

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311 Kilobytes pages

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Benesch, Jay December 1, 1993.

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Description

CEBAF has been collecting much data during the cavity pair assembly process. Some process data has been entered and analyzed during the last two years as part of our attempt to apply statistical process control methods. Analysis is presented here on mechanical tolerances achieved by the industrial fabricator of the CEBAF superconducting rf cavities (Siemens). Suggestions for tolerances obtainable in future procurements are made. Influence of cooldown conditions during vertical test on field emission onset gradient is discussed. An increase in the mean gradient of 2 MV/m was seen after a simple change in procedure.

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311 Kilobytes pages

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  • 6th RF Superconductivity Workshop, Newport News, VA (US), 10/1993

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  • Report No.: CEBAF-PR-93-057
  • Report No.: DOE/ER/40150-1999
  • Grant Number: AC05-84ER40150
  • Office of Scientific & Technical Information Report Number: 791697
  • Archival Resource Key: ark:/67531/metadc739349

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  • December 1, 1993

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  • Oct. 19, 2015, 7:39 p.m.

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  • Feb. 5, 2016, 8:55 p.m.

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Benesch, Jay. Preliminary Statistical Analysis of CEBAF's Cavity Pair Assembly Process Data, article, December 1, 1993; Newport News, Virginia. (digital.library.unt.edu/ark:/67531/metadc739349/: accessed August 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.