Resonantly Enhanced Betatron Hard X-rays from Ionization Injected Electrons in a Laser Plasma Accelerator.
Ultrafast betatron x-ray emission from electron oscillations in laser wakefield acceleration (LWFA) has been widely investigated as a promising source. Betatron x-rays are usually produced via self-injected electron beams, which are not controllable and are not optimized for x-ray yields. Here, we present a new method for bright hard x-ray emission via ionization injection from the K-shell electrons of nitrogen into the accelerating bucket. A total photon yield of 8 × 10(8)/shot and 10(8 )photons with energy greater than 110 keV is obtained. The yield is 10 times higher than that achieved with self-injection mode in helium under similar laser parameters. The simulation suggests that ionization-injected electrons are quickly accelerated to the driving laser region and are subsequently driven into betatron resonance. The present scheme enables the single-stage betatron radiation from LWFA to be extended to bright γ-ray radiation, which is beyond the capability of 3(rd) generation synchrotrons.
Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, CAS, Beijing 100190, China.
K
K
Huang
Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, CAS, Beijing 100190, China.
Y F
YF
Li
Institute of High Energy Physics, CAS, Beijing 100049, China.
D Z
DZ
Li
Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, CAS, Beijing 100190, China.|Collaborative Innovation Center of IFSA, Shanghai Jiao Tong University, Shanghai 200240, China.
L M
LM
Chen
Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, CAS, Beijing 100190, China.
M Z
MZ
Tao
Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, CAS, Beijing 100190, China.
Y
Y
Ma
Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, CAS, Beijing 100190, China.
J R
JR
Zhao
Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, CAS, Beijing 100190, China.
M H
MH
Li
Collaborative Innovation Center of IFSA, Shanghai Jiao Tong University, Shanghai 200240, China.|Key Laboratory for Laser Plasmas (MOE) and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.
M
M
Chen
Key Laboratory for Laser Plasmas (MOE) and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.
M
M
Mirzaie
Collaborative Innovation Center of IFSA, Shanghai Jiao Tong University, Shanghai 200240, China.|Key Laboratory for Laser Plasmas (MOE) and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.
N
N
Hafz
Collaborative Innovation Center of IFSA, Shanghai Jiao Tong University, Shanghai 200240, China.|Key Laboratory for Laser Plasmas (MOE) and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.
T
T
Sokollik
Collaborative Innovation Center of IFSA, Shanghai Jiao Tong University, Shanghai 200240, China.|Key Laboratory for Laser Plasmas (MOE) and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.|SUPA, Department of Physics, University of Strathclyde, Glasgow G4 0NG, United Kingdom.
Z M
ZM
Sheng
Collaborative Innovation Center of IFSA, Shanghai Jiao Tong University, Shanghai 200240, China.|Key Laboratory for Laser Plasmas (MOE) and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.
J
J
Zhang