Hose instability and wake generation by an intense electron beam in a self-ionized gas.
The propagation of an intense relativistic electron beam through a gas that is self-ionized by the beam's space charge and wakefields is examined analytically and with 3D particle-in-cell simulations. Instability arises from the coupling between a beam and the offset plasma channel it creates when it is perturbed. The traditional electron hose instability in a preformed plasma is replaced with this slower growth instability depending on the radius of the ionization channel compared to the electron blowout radius. A new regime for hose stable plasma wakefield acceleration is suggested.
University of Southern California, Los Angeles, California 90089, USA.
S
S
Deng
C D
CD
Barnes
C E
CE
Clayton
C
C
O'Connell
F J
FJ
Decker
R A
RA
Fonseca
C
C
Huang
M J
MJ
Hogan
R
R
Iverson
D K
DK
Johnson
C
C
Joshi
T
T
Katsouleas
P
P
Krejcik
W
W
Lu
W B
WB
Mori
P
P
Muggli
E
E
Oz
F
F
Tsung
D
D
Walz
M
M
Zhou