Tevatron stripline turn by turn data and the head-tail instability

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Vic Scarpine recently collected turn by turn data from the vertical wideband stripline in the Tevatron during proton injection for store 1841. The data file name is ''PHT004.txt''. The single bunch intensity was roughly 200e9. The chromaticity was set to ''+6'' horizontal and ''-2'' vertical to induce instability. The data shown represents an extreme condition that shortly preceded losses leading to an abort. A Yokogawa DL 7200 oscilloscope was used to measure A-B and A+B simultaneously from the 1 meter long stripline. The scope has an analogue bandwidth of 500MHz with a 2 GHz sample rate. On each of the ... continued below

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131 Kilobytes pages

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Crisp, James L December 9, 2002.

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Description

Vic Scarpine recently collected turn by turn data from the vertical wideband stripline in the Tevatron during proton injection for store 1841. The data file name is ''PHT004.txt''. The single bunch intensity was roughly 200e9. The chromaticity was set to ''+6'' horizontal and ''-2'' vertical to induce instability. The data shown represents an extreme condition that shortly preceded losses leading to an abort. A Yokogawa DL 7200 oscilloscope was used to measure A-B and A+B simultaneously from the 1 meter long stripline. The scope has an analogue bandwidth of 500MHz with a 2 GHz sample rate. On each of the 2048 turns taken, 200 samples were saved. Vic Scarpine assembled some movie files from the same data that revealed intriguing variations in the A-B signals. The Excel data file contains 2048 turns of A+B followed by 2048 turns of A-B. The 200 samples taken on each turn is placed on one line in the file. Beam was injected at line 14 for A+B and line 2062 for A-B. Eight consecutive turns of data are examined starting at 1490 turns after injection (lines 1504-11 for A+B and 3552-9 for A-B).

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131 Kilobytes pages

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  • Other Information: PBD: 9 Dec 2002

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  • Report No.: FERMILAB-TM-2195
  • Grant Number: AC02-76CH03000
  • DOI: 10.2172/805561 | External Link
  • Office of Scientific & Technical Information Report Number: 805561
  • Archival Resource Key: ark:/67531/metadc738849

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

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  • December 9, 2002

Added to The UNT Digital Library

  • Oct. 18, 2015, 6:40 p.m.

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  • April 1, 2016, 6:01 p.m.

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Crisp, James L. Tevatron stripline turn by turn data and the head-tail instability, report, December 9, 2002; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc738849/: accessed August 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.