Enhanced acceleration of injected electrons in a laser-beat-wave-induced plasma channel.
Enhanced energy gain of externally injected electrons by a approximately 3 cm long, high-gradient relativistic plasma wave (RPW) is demonstrated. Using a CO2 laser beat wave of duration longer than the ion motion time across the laser spot size, a laser self-guiding process is initiated in a plasma channel. Guiding compensates for ionization-induced defocusing (IID) creating a longer plasma, which extends the interaction length between electrons and the RPW. In contrast to a maximum energy gain of 10 MeV when IID is dominant, the electrons gain up to 38 MeV energy in a laser-beat-wave-induced plasma channel.
Tochitsky
S Ya
SY
Neptune Laboratory, Department of Electrical Engineering, University of California, Los Angeles, California 90095, USA.
Narang
R
R
Filip
C V
CV
Musumeci
P
P
Clayton
C E
CE
Yoder
R B
RB
Marsh
K A
KA
Rosenzweig
J B
JB
Pellegrini
C
C
Joshi
C
C