Electromagnetic field analysis of septum magnet for APS positron accumulator ring

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Description

This report consists of three parts. The first part describes a numerical analysis method for the electromagnetic field analysis of a septum magnet. A novel improvement to the treatment of exciting currents in the time-domain is proposed. The second part discusses numerical predictions of the electromagnetic characteristics of the APS PAR septum. The time variations of stray field and eddy currents are shown for three magnet designs. The last part explores how decreasing the septum material conductivity affects the stray field. The decrease of conductivity may be caused by an inadequate manufacturing of the septum material. The significance of a ... continued below

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22 p.

Creation Information

Yokoi, Toshiaki & Turner, L.R. July 1, 1995.

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This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this report can be viewed below.

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Description

This report consists of three parts. The first part describes a numerical analysis method for the electromagnetic field analysis of a septum magnet. A novel improvement to the treatment of exciting currents in the time-domain is proposed. The second part discusses numerical predictions of the electromagnetic characteristics of the APS PAR septum. The time variations of stray field and eddy currents are shown for three magnet designs. The last part explores how decreasing the septum material conductivity affects the stray field. The decrease of conductivity may be caused by an inadequate manufacturing of the septum material. The significance of a high quality septum, or flat interface between copper and iron, is emphasized from a point of view of stray field. An ideal method for joining two different metals without distortion, called HIP (Hot Isostatic Pressing), is introduced and recommended based on the authors` experience.

Physical Description

22 p.

Notes

INIS; OSTI as DE95015232

Source

  • Other Information: PBD: [1995]

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  • Other: DE95015232
  • Report No.: LS--233
  • Grant Number: W-31-109-ENG-38
  • DOI: 10.2172/87844 | External Link
  • Office of Scientific & Technical Information Report Number: 87844
  • Archival Resource Key: ark:/67531/metadc792063

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Creation Date

  • July 1, 1995

Added to The UNT Digital Library

  • Dec. 19, 2015, 7:14 p.m.

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  • Jan. 6, 2016, 2:48 p.m.

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Yokoi, Toshiaki & Turner, L.R. Electromagnetic field analysis of septum magnet for APS positron accumulator ring, report, July 1, 1995; Illinois. (digital.library.unt.edu/ark:/67531/metadc792063/: accessed September 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.