scholarly journals Simulation studies of space-charge-dominated beam transport in large-aperture ratio quadrupoles

1993 ◽  
Vol 106 (11) ◽  
pp. 1637-1642
Author(s):  
W. M. Fawley ◽  
L. J. Laslett ◽  
C. M. Celata ◽  
A. Faltens ◽  
I. Haber
Keyword(s):  
Space Charge ◽  
Simulation Studies ◽  
Beam Transport ◽  
Large Aperture ◽  
Aperture Ratio

Space‐charge‐neutralized proton beam transport in an axial magnetic field

1990 ◽  
Vol 67 (2) ◽  
pp. 611-616 ◽  
Author(s):  
G. S. Kerslick ◽  
Cz. Golkowski ◽  
J. A. Nation ◽  
I. S. Roth ◽  
J. D. Ivers
Keyword(s):  
Magnetic Field ◽  
Space Charge ◽  
Proton Beam ◽  
Axial Magnetic Field ◽  
Beam Transport

scholarly journals Transport of intense beams with current-dependent initial conditions in linearly tapered solenoid channels

2019 ◽  
Vol 37 (4) ◽  
pp. 312-323
Author(s):  
J. R. Harris
Keyword(s):  
Space Charge ◽  
Initial Conditions ◽  
Electron Beams ◽  
Electron Gun ◽  
Beam Transport ◽  
Initial Correlation ◽  
Longitudinal Correlation ◽  
Channel Transport ◽  
Lower Slice ◽  
A Current

AbstractIn electron beams where space charge plays an important role in the beam transport, the beams’ transverse and longitudinal properties will become coupled. One example of this is the transverse–longitudinal correlation produced in a current-modulated beam generated in a DC electron gun, formed through the competition between the time-dependent radial space charge force and the time-independent radial focusing force. This correlation will cause both the slice radius and divergence of the beam extracted from the gun to depend on the slice current. Here we consider the transport of such a beam in a linearly tapered solenoid focusing channel. Transport performance was generally improved with longer taper lengths, minimal initial correlation between slice divergence and slice current, and moderate degrees of initial correlation between initial slice radius and slice current. Performance was also generally improved with lower slice emittances, although surprisingly transport was improved by slightly increasing the assumed slice emittance in certain limited circumstances.

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