Skip to main content

LUP Student Papers

LUND UNIVERSITY LIBRARIES

Modelling the evolution of an ion beam through a 3 MV Pelletron accelerator

van Woudenberg, Niek (2021)
Nuclear physics
Abstract
In this work simulations of the LIBAF Pelletron were performed to gain insight into the parameters that govern the machine operation and control. Three simulation packages: COMSOL, WARP and TURTLE/TRANSPORT were employed, and cross-validation of these software packages was performed by test-case simulations. The major components of the Pelletron were simulated on a individual basis to ensure their behaviour was well understood. These components were finally incorporated into a full source-to-exit simulation in COMSOL. Disagreement by a factor of two was found between the beam divergences predicted by TURTLE and the other two packages at an initial energy of 30 keV, for test-case simulations. Good agreement was seen in test-case simulations... (More)
In this work simulations of the LIBAF Pelletron were performed to gain insight into the parameters that govern the machine operation and control. Three simulation packages: COMSOL, WARP and TURTLE/TRANSPORT were employed, and cross-validation of these software packages was performed by test-case simulations. The major components of the Pelletron were simulated on a individual basis to ensure their behaviour was well understood. These components were finally incorporated into a full source-to-exit simulation in COMSOL. Disagreement by a factor of two was found between the beam divergences predicted by TURTLE and the other two packages at an initial energy of 30 keV, for test-case simulations. Good agreement was seen in test-case simulations of the Einzel lens, for the envelopes and focal points, predicted by WARP and COMSOL. A focal point at infinity was obtained for Einzel potentials of between 12.7 and 12.8 kV, for both packages. For the full LIBAF Pelletron simulation in COMSOL, the emittance of the beam exiting the machine was found to be proportional to the beam current. This proportionality indicating that simulations of this type could potentially be used to optimise the accelerator settings for specific user needs. As beam losses were also quantified in the full Pelletron simulations, it is possible to estimate the maximum attainable beam current from the machine, for a given set of user setting, if the current produced by the ion source is known. (Less)
Please use this url to cite or link to this publication:
author
van Woudenberg, Niek
supervisor
organization
year
type
M2 - Bachelor Degree
subject
keywords
accelerator modelling, ion-beam transport, Pelletron simulation, 3D simulation, cross-validation
language
English
additional info
This work was carried out under the Division of Nuclear Physics of Lund University for the Bachelor Of Science degree at Saxion University Of Applied Sciences.
id
9064138
date added to LUP
2021-08-30 11:58:54
date last changed
2021-08-30 11:59:03
@misc{9064138,
  abstract     = {{In this work simulations of the LIBAF Pelletron were performed to gain insight into the parameters that govern the machine operation and control. Three simulation packages: COMSOL, WARP and TURTLE/TRANSPORT were employed, and cross-validation of these software packages was performed by test-case simulations. The major components of the Pelletron were simulated on a individual basis to ensure their behaviour was well understood. These components were finally incorporated into a full source-to-exit simulation in COMSOL. Disagreement by a factor of two was found between the beam divergences predicted by TURTLE and the other two packages at an initial energy of 30 keV, for test-case simulations. Good agreement was seen in test-case simulations of the Einzel lens, for the envelopes and focal points, predicted by WARP and COMSOL. A focal point at infinity was obtained for Einzel potentials of between 12.7 and 12.8 kV, for both packages. For the full LIBAF Pelletron simulation in COMSOL, the emittance of the beam exiting the machine was found to be proportional to the beam current. This proportionality indicating that simulations of this type could potentially be used to optimise the accelerator settings for specific user needs. As beam losses were also quantified in the full Pelletron simulations, it is possible to estimate the maximum attainable beam current from the machine, for a given set of user setting, if the current produced by the ion source is known.}},
  author       = {{van Woudenberg, Niek}},
  language     = {{eng}},
  note         = {{Student Paper}},
  title        = {{Modelling the evolution of an ion beam through a 3 MV Pelletron accelerator}},
  year         = {{2021}},
}