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Title: Ion Beam Simulator

Abstract

IBSimu(Ion Beam Simulator) is a computer program for making two and three dimensional ion optical simulations. The program can solve electrostatic field in a rectangular mesh using Poisson equation using Finite Difference method (FDM). The mesh can consist of a coarse and a fine part so that the calculation accuracy can be increased in critical areas of the geometry, while most of the calculation is done quickly using the coarse mesh. IBSimu can launch ion beam trajectories into the simulation from an injection surface or fomo plasma. Ion beam space charge of time independent simulations can be taken in account using Viasov iteration. Plasma is calculated by compensating space charge with electrons having Boltzmann energy distribution. The simulation software can also be used to calculate time dependent cases if the space charge is not calculated. Software includes diagnostic tools for plotting the geometry, electric field, space charge map, ion beam trajectories, emittance data and beam profiles.

Authors:
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory
Sponsoring Org.:
USDOE
OSTI Identifier:
1250496
Report Number(s):
IBSimu; 002135IBMPC00
R&D Project: B&R # 600301010 Project number Z2ISTE; LBNL CR- 2243
DOE Contract Number:
AC03-76SF00098
Resource Type:
Software
Software Revision:
00
Software Package Number:
002135
Software Package Contents:
Open Source Software package available from Lawrence Berkeley National Laboratory at the following URL: www.cc.jyu.fi/tvkalva/code/ibsimu/
Software CPU:
IBMPC
Open Source:
Yes
Source Code Available:
Yes
Country of Publication:
United States

Citation Formats

Kalvas, Taneli. Ion Beam Simulator. Computer software. https://www.osti.gov//servlets/purl/1250496. Vers. 00. USDOE. 8 Nov. 2005. Web.
Kalvas, Taneli. (2005, November 8). Ion Beam Simulator (Version 00) [Computer software]. https://www.osti.gov//servlets/purl/1250496.
Kalvas, Taneli. Ion Beam Simulator. Computer software. Version 00. November 8, 2005. https://www.osti.gov//servlets/purl/1250496.
@misc{osti_1250496,
title = {Ion Beam Simulator, Version 00},
author = {Kalvas, Taneli},
abstractNote = {IBSimu(Ion Beam Simulator) is a computer program for making two and three dimensional ion optical simulations. The program can solve electrostatic field in a rectangular mesh using Poisson equation using Finite Difference method (FDM). The mesh can consist of a coarse and a fine part so that the calculation accuracy can be increased in critical areas of the geometry, while most of the calculation is done quickly using the coarse mesh. IBSimu can launch ion beam trajectories into the simulation from an injection surface or fomo plasma. Ion beam space charge of time independent simulations can be taken in account using Viasov iteration. Plasma is calculated by compensating space charge with electrons having Boltzmann energy distribution. The simulation software can also be used to calculate time dependent cases if the space charge is not calculated. Software includes diagnostic tools for plotting the geometry, electric field, space charge map, ion beam trajectories, emittance data and beam profiles.},
url = {https://www.osti.gov//servlets/purl/1250496},
doi = {},
year = {Tue Nov 08 00:00:00 EST 2005},
month = {Tue Nov 08 00:00:00 EST 2005},
note =
}

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  • A three-dimensional ion optical code IBSimu, which is being developed at University of Jyvaeskylae, features positive and negative ion plasma extraction models and self-consistent space charge calculation. The code has been utilized for modeling the existing extraction system of the H{sup -} ion source of the Spallation Neutron Source. Simulation results are in good agreement with experimental data. A high-current extraction system with downstream electron dumping at intermediate energy has been designed. According to the simulations it provides lower emittance compared to the baseline system at H{sup -} currents exceeding 40 mA. A magnetic low energy beam transport section consistingmore » of two solenoids has been designed to transport the beam from the alternative electrostatic extraction systems to the radio frequency quadrupole.« less
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  • Transverse beam emittance is a crucial property of charged particle beams that describes their angular and spatial spread. It is a fi gure of merit frequently used to determine the quality of ion beams, the compatibility of an ion beam with a given beam transport system, and the ability to suppress neighboring isotopes at on-line mass separator facilities. Generally a high quality beam is characterized by a small emittance. In order to determine and improve the quality of ion beams used at the Holifi eld Radioactive Ion beam Facility (HRIBF) for nuclear physics and nuclear astrophysics research, the emittances ofmore » the ion beams are measured at the off-line Ion Source Test Facilities. In this project, emittance analysis software was developed to perform various data processing tasks for noise reduction, to evaluate root-mean-square emittance, Twiss parameters, and area emittance of different beam fractions. The software also provides 2D and 3D graphical views of the emittance data, beam profi les, emittance contours, and RMS. Noise exclusion is essential for accurate determination of beam emittance values. A Self-Consistent, Unbiased Elliptical Exclusion (SCUBEEx) method is employed. Numerical data analysis techniques such as interpolation and nonlinear fi tting are also incorporated into the software. The software will provide a simplifi ed, fast tool for comprehensive emittance analysis. The main functions of the software package have been completed. In preliminary tests with experimental emittance data, the analysis results using the software were shown to be accurate.« less
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  • The design of ISI's SDI architecture simulator was intended to minimize the software development necessary to add new simulation models to the system or to refine the detail of existing ones. The key software design approach used to accomplish this goal was the modeling of each simulated defense system component by a software object called a 'technology module.' Each technology module provided a carefully defined abstract interface between the component model and the rest of the simulation system, particularly the simulation models of battle managers. This report documents the first test of the validity of this software design approach. Amore » new technology module modeling a kinetic kill vehicle' (KKV) was added to the simulator. Although this technology module had an impact on several parts of the simulation system in the form of new data structures and functions that had to be created, the integration of the new module was accomplished without the necessity of replacing any existing code.« less

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