A thermal analysis model for high power density beam stops

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Description

The Lawrence Berkeley National Laboratory (LBNL) is presently designing and building the 2.5 MeV injector for the Spallation Neutron Source (SNS). The design includes various beam intercepting devices such as beam stops and slits. The target power densities can be as high as 500 kW/cm{sup 2} with a beam stopping range of 25 to 30 microns, producing stresses well above yield in most materials. In order to analyze the induced temperatures and stresses, a finite element model has been developed. The model has been written parametrically to allow the beam characteristics, target material, dimensions, angle of incidence and mesh densities ... continued below

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3 pages

Creation Information

Virostek, S.; Oshatz, D. & Staples, J. June 8, 2001.

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Description

The Lawrence Berkeley National Laboratory (LBNL) is presently designing and building the 2.5 MeV injector for the Spallation Neutron Source (SNS). The design includes various beam intercepting devices such as beam stops and slits. The target power densities can be as high as 500 kW/cm{sup 2} with a beam stopping range of 25 to 30 microns, producing stresses well above yield in most materials. In order to analyze the induced temperatures and stresses, a finite element model has been developed. The model has been written parametrically to allow the beam characteristics, target material, dimensions, angle of incidence and mesh densities to be easily adjusted. The heat load is applied to the model through the use of a 3-dimensional table containing the calculated volumetric heat rates. The load is based on a bi-gaussian beam shape which is absorbed by the target according to a Bragg peak distribution. The results of several analyses using the SNS Front End beam are presented.

Physical Description

3 pages

Notes

INIS; OSTI as DE00783487

Source

  • 2001 Particle Accelerator Conference, Chicago, IL (US), 06/18/2001--06/22/2001

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  • Report No.: LBNL--47341
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 783487
  • Archival Resource Key: ark:/67531/metadc723848

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  • June 8, 2001

Added to The UNT Digital Library

  • Sept. 29, 2015, 5:31 a.m.

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  • April 5, 2016, 5:41 p.m.

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Virostek, S.; Oshatz, D. & Staples, J. A thermal analysis model for high power density beam stops, article, June 8, 2001; California. (digital.library.unt.edu/ark:/67531/metadc723848/: accessed August 16, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.