Emittance growth due to space charge compensation and beam intensity instabilities in negative ion beams
The need to extract the maximum beam intensity with low transversal emittance often comes with the drawback of operating the ion source to limits where beam current instabilities arise, such fluctuations can change the beam properties producing a mismatch in the following sections of the machine. Th...
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2018-03-01
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Series: | Physical Review Accelerators and Beams |
Online Access: | http://doi.org/10.1103/PhysRevAccelBeams.21.030101 |
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doaj-12378da9b5d74c10999089efc7698d7a2020-11-24T23:09:10ZengAmerican Physical SocietyPhysical Review Accelerators and Beams2469-98882018-03-0121303010110.1103/PhysRevAccelBeams.21.030101Emittance growth due to space charge compensation and beam intensity instabilities in negative ion beamsC. A. Valerio-LizarragaThe need to extract the maximum beam intensity with low transversal emittance often comes with the drawback of operating the ion source to limits where beam current instabilities arise, such fluctuations can change the beam properties producing a mismatch in the following sections of the machine. The space charge compensation (SCC) generated by the beam particles colliding with the residual gas reaches a steady state after a build-up time. This paper shows how once in the steady state, the beam ends with a transversal emittance value bigger than the case without compensation. In addition, we study how the beam intensity variation can disturb the SCC dynamics and its impact on the beam properties. The results presented in this work come from 3-D simulations using tracking codes taking into account the secondary ions to estimate the degree of the emittance growth due to space charge and SCC.http://doi.org/10.1103/PhysRevAccelBeams.21.030101 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
C. A. Valerio-Lizarraga |
spellingShingle |
C. A. Valerio-Lizarraga Emittance growth due to space charge compensation and beam intensity instabilities in negative ion beams Physical Review Accelerators and Beams |
author_facet |
C. A. Valerio-Lizarraga |
author_sort |
C. A. Valerio-Lizarraga |
title |
Emittance growth due to space charge compensation and beam intensity instabilities in negative ion beams |
title_short |
Emittance growth due to space charge compensation and beam intensity instabilities in negative ion beams |
title_full |
Emittance growth due to space charge compensation and beam intensity instabilities in negative ion beams |
title_fullStr |
Emittance growth due to space charge compensation and beam intensity instabilities in negative ion beams |
title_full_unstemmed |
Emittance growth due to space charge compensation and beam intensity instabilities in negative ion beams |
title_sort |
emittance growth due to space charge compensation and beam intensity instabilities in negative ion beams |
publisher |
American Physical Society |
series |
Physical Review Accelerators and Beams |
issn |
2469-9888 |
publishDate |
2018-03-01 |
description |
The need to extract the maximum beam intensity with low transversal emittance often comes with the drawback of operating the ion source to limits where beam current instabilities arise, such fluctuations can change the beam properties producing a mismatch in the following sections of the machine. The space charge compensation (SCC) generated by the beam particles colliding with the residual gas reaches a steady state after a build-up time. This paper shows how once in the steady state, the beam ends with a transversal emittance value bigger than the case without compensation. In addition, we study how the beam intensity variation can disturb the SCC dynamics and its impact on the beam properties. The results presented in this work come from 3-D simulations using tracking codes taking into account the secondary ions to estimate the degree of the emittance growth due to space charge and SCC. |
url |
http://doi.org/10.1103/PhysRevAccelBeams.21.030101 |
work_keys_str_mv |
AT cavaleriolizarraga emittancegrowthduetospacechargecompensationandbeamintensityinstabilitiesinnegativeionbeams |
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1725611128889802752 |