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.
Deng
S
S
University of Southern California, Los Angeles, California 90089, USA.
Barnes
C D
CD
Clayton
C E
CE
O'Connell
C
C
Decker
F J
FJ
Fonseca
R A
RA
Huang
C
C
Hogan
M J
MJ
Iverson
R
R
Johnson
D K
DK
Joshi
C
C
Katsouleas
T
T
Krejcik
P
P
Lu
W
W
Mori
W B
WB
Muggli
P
P
Oz
E
E
Tsung
F
F
Walz
D
D
Zhou
M
M