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Title: A thermal analysis model for high power density beam stops

Abstract

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.

Authors:
; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab., CA (US)
Sponsoring Org.:
USDOE Director, Office of Science. Office of Basic Energy Studies (US)
OSTI Identifier:
783487
Report Number(s):
LBNL-47341
R&D Project: 8212R1; TRN: US0104007
DOE Contract Number:  
AC03-76SF00098
Resource Type:
Conference
Resource Relation:
Conference: 2001 Particle Accelerator Conference, Chicago, IL (US), 06/18/2001--06/22/2001; Other Information: PBD: 8 Jun 2001
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; BRAGG CURVE; HEAT RATE; INCIDENCE ANGLE; NEUTRON SOURCES; POWER DENSITY; SPALLATION; THERMAL ANALYSIS; BEAM INJECTION; BEAM DUMPS; DESIGN; FINITE ELEMENT METHOD; MATHEMATICAL MODELS; BEAM STOPS

Citation Formats

Virostek, S., Oshatz, D., and Staples, J.. A thermal analysis model for high power density beam stops. United States: N. p., 2001. Web.
Virostek, S., Oshatz, D., & Staples, J.. A thermal analysis model for high power density beam stops. United States.
Virostek, S., Oshatz, D., and Staples, J.. Fri . "A thermal analysis model for high power density beam stops". United States. https://www.osti.gov/servlets/purl/783487.
@article{osti_783487,
title = {A thermal analysis model for high power density beam stops},
author = {Virostek, S. and Oshatz, D. and Staples, J.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2001},
month = {6}
}

Conference:
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