Emittance growth due to radial density variations of an emittance-dominated electron beam in a channel with continuous acceleration and focusing

1998 ◽  
Vol 5 (4) ◽  
pp. 1148-1161 ◽  
Author(s):  
Bruce E. Carlsten
Keyword(s):  
Electron Beam ◽  
Radial Density ◽  
Emittance Growth

scholarly journals Skew Quadrupole Effect of Laser Plasma Electron Beam Transport

2019 ◽  
Vol 9 (12) ◽  
pp. 2447 ◽  
Author(s):  
Driss Oumbarek Espinos ◽  
Amin Ghaith ◽  
Thomas André ◽  
Charles Kitégi ◽  
Mourad Sebdaoui ◽  
...  
Keyword(s):  
Electron Beam ◽  
Laser Plasma ◽  
Free Electron ◽  
Free Electron Laser ◽  
Plasma Electron ◽  
Beam Transport ◽  
Emittance Growth ◽  
Quadrupole Effect ◽  
Beam Parameters ◽  
Electron Beam Transport

Laser plasma acceleration (LPA) capable of providing femtosecond and GeV electron beams in cm scale distances brings a high interest for different applications, such as free electron laser and future colliders. Nevertheless, LPA high divergence and energy spread require an initial strong focus to mitigate the chromatic effects. The reliability, in particular with the pointing fluctuations, sets a real challenge for the control of the dispersion along the electron beam transport. We examine here how the magnetic defects of the first strong quadrupoles, in particular, the skew terms, can affect the brightness of the transported electron beam, in the case of the COXINEL transport line, designed for manipulating the electron beam properties for a free electron laser application. We also show that the higher the initial beam divergence, the larger the degradation. Experimentally, after having implemented a beam pointing alignment compensation method enabling us to adjust the position and dispersion independently, we demonstrate that the presence of non-negligible skew quadrupolar components induces a transversal spread and tilt of the beam, leading to an emittance growth and brightness reduction. We are able to reproduce the measurements with beam transport simulations using the measured electron beam parameters.

Emittance Growth and Image Formation in a Nonuniform Space-Charge-Dominated Electron Beam

1988 ◽  
Vol 61 (26) ◽  
pp. 2933-2936 ◽  
Author(s):  
M. Reiser ◽  
C. R. Chang ◽  
D. Kehne ◽  
K. Low ◽  
T. Shea ◽  
...  
Keyword(s):  
Electron Beam ◽  
Space Charge ◽  
Image Formation ◽  
Emittance Growth

Emittance Growth and Image Formation in a Nonuniform Space-Charge-Dominated Electron Beam

1989 ◽  
Vol 62 (6) ◽  
pp. 694-694
Author(s):  
M. Reiser ◽  
C. R. Chang ◽  
D. Kehne ◽  
K. Low ◽  
T. Shea ◽  
...  
Keyword(s):  
Electron Beam ◽  
Space Charge ◽  
Image Formation ◽  
Emittance Growth
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