Resistive wall instability in a uniform beam: simulation vs analytical results

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The time-dependent behavior of the resistive wall instability in a uniform charged beam is investigated by means of computer simulation. Results are compared with linear analytical results for a range of cases in which two parameters are varied: the resistive wall term and the initial thermal spread of the beam. In general, good agreement is found between simulation and theoretical results. The main conclusion is that the growth rate of any mode increases with the resistive term and decreases as a function of the thermal spread. There is always a maximum marginally unstable wavenumber k for any nonzero thermal spread. ... continued below

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Pages: 27

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Sternlieb, A. June 1, 1981.

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Description

The time-dependent behavior of the resistive wall instability in a uniform charged beam is investigated by means of computer simulation. Results are compared with linear analytical results for a range of cases in which two parameters are varied: the resistive wall term and the initial thermal spread of the beam. In general, good agreement is found between simulation and theoretical results. The main conclusion is that the growth rate of any mode increases with the resistive term and decreases as a function of the thermal spread. There is always a maximum marginally unstable wavenumber k for any nonzero thermal spread. The linear growth rate is roughly the same for the thermal spread and for the electric field amplitude. An overshoot phenomenon is present, in the sense that the thermal spread continues to grow after the electric field has reached saturation.

Physical Description

Pages: 27

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NTIS, PC A03/MF A01.

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  • Other: DE81026269
  • Report No.: LBL-12878
  • Grant Number: W-7405-ENG-48
  • DOI: 10.2172/6463996 | External Link
  • Office of Scientific & Technical Information Report Number: 6463996
  • Archival Resource Key: ark:/67531/metadc1203428

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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

  • June 1, 1981

Added to The UNT Digital Library

  • July 5, 2018, 11:11 p.m.

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  • Oct. 30, 2018, 12:25 p.m.

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Sternlieb, A. Resistive wall instability in a uniform beam: simulation vs analytical results, report, June 1, 1981; California. (digital.library.unt.edu/ark:/67531/metadc1203428/: accessed November 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.