Impedances and collective instabilities of the Tevatron at Run II

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The longitudinal and transverse coupling impedances of the Tevatron vacuum chamber are estimated and summed up. The resistive-wall impedances of the beam pipe and the laminations in the Lambertson magnets dominate below {approximately} 50 MHz. Then come the inductive parts of the bellows and BPM`s. The longitudinal and transverse collective instabilities, for both single bunch and multi bunches, are studied using Run II parameters. As expected the transverse coupled-bunch instability driven by the resistive-wall impedance is the most severe collective instability. However, it can be damped by a transverse damper designed for the correction of injection offsets. The power of ... continued below

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40 p.; Other: FDE: PDF; PL:

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Ng, King-Yuen, FERMI September 1, 1998.

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Description

The longitudinal and transverse coupling impedances of the Tevatron vacuum chamber are estimated and summed up. The resistive-wall impedances of the beam pipe and the laminations in the Lambertson magnets dominate below {approximately} 50 MHz. Then come the inductive parts of the bellows and BPM`s. The longitudinal and transverse collective instabilities, for both single bunch and multi bunches, are studied using Run II parameters. As expected the transverse coupled-bunch instability driven by the resistive-wall impedance is the most severe collective instability. However, it can be damped by a transverse damper designed for the correction of injection offsets. The power of such a damper has been studied.

Physical Description

40 p.; Other: FDE: PDF; PL:

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OSTI as DE98059069

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  • Other Information: PBD: Sep 1998

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  • Other: DE98059069
  • Report No.: FNAL-TM--2055
  • Grant Number: AC02-76CH03000
  • DOI: 10.2172/657447 | External Link
  • Office of Scientific & Technical Information Report Number: 657447
  • Archival Resource Key: ark:/67531/metadc702881

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  • September 1, 1998

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  • Sept. 12, 2015, 6:31 a.m.

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  • April 1, 2016, 5:30 p.m.

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Ng, King-Yuen, FERMI. Impedances and collective instabilities of the Tevatron at Run II, report, September 1, 1998; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc702881/: accessed August 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.