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Title: Method for computing self-consistent solution in a gun code

Patent ·
OSTI ID:1159840

Complex gun code computations can be made to converge more quickly based on a selection of one or more relaxation parameters. An eigenvalue analysis is applied to error residuals to identify two error eigenvalues that are associated with respective error residuals. Relaxation values can be selected based on these eigenvalues so that error residuals associated with each can be alternately reduced in successive iterations. In some examples, relaxation values that would be unstable if used alone can be used.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC52-06NA25396
Assignee:
Los Alamos National Security, LLC (Los Alamos, NM)
Patent Number(s):
8,843,323
Application Number:
12/780,776
OSTI ID:
1159840
Country of Publication:
United States
Language:
English

References (6)

Scanning techniques in particle beam devices for reducing the effects of surface charge accumulation patent April 1994
Current accumulation for a self magnetic field calculation in a finite-element gun code journal August 2005
An Analysis of the Basic Space-Charge-Limited Emission Algorithm in a Finite-Element Electrostatic Gun Code journal June 2004
Recent Developments to the MICHELLE 2-D/3-D Electron Gun and Collector Modeling Code journal May 2005
The michelle three-dimensional electron gun and collector modeling tool: theory and design journal June 2002
19.3: Demystifying relaxation in the gun code algorithm conference May 2010

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