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Title: Relativistic laser driven electron accelerator using micro-channel plasma targets

Journal Article · · Physics of Plasmas
DOI:https://doi.org/10.1063/1.5087409· OSTI ID:1515026
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3];  [4];  [5];  [4];  [5];  [6];  [5];  [4];  [4];  [4];  [7];  [4]
  1. Miami Univ., Hamilton, OH (United States). Dept. of Mathematical and Physical Sciences
  2. Chinese Academy of Sciences (CAS), Shanghai (China). Shanghai Inst. of Optics and Fine Mechanics, State Key Lab. of High Field Laser Physics; CAS Center for Excellence in Ultra-intense Laser Science, Shanghai (China)
  3. Innovative Scientific Solutions Inc., Dayton, OH (United States)
  4. The Ohio State Univ., Columbus, OH (United States). Dept of Physics
  5. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  6. Voss Scientific, Albuquerque, NM (United States)
  7. Chinese Academy of Sciences (CAS), Shanghai (China). Shanghai Inst. of Optics and Fine Mechanics, State Key Lab. of High Field Laser Physics; CAS Center for Excellence in Ultra-intense Laser Science, Shanghai (China); Shanghai Normal Univ., Shanghai (China)

We present an experimental demonstration of the efficient acceleration of electrons beyond 60MeV using micro-channel plasma targets. We employed a high-contrast, 2.5 J, 32 fs short pulse laser interacting with a 5 lm inner diameter, 300 lm long microchannel plasma target. The micro-channel was aligned to be collinear with the incident laser pulse, confining the majority of the laser energy within the channel. The measured electron spectrum showed a large increase in the cut-off energy and slope temperature when compared to that from a 2 lm flat Copper target, with the cutoff energy more than doubled and the total energy in electrons >5MeV enhanced by over 10 times. Three-dimensional particle-in-cell simulations confirm efficient direct laser acceleration enabled by the novel structure as the dominant acceleration mechanism for the high energy electrons. The simulations further reveal the guiding effect of the channel that successfully explains preferential acceleration on the laser/channel axis observed in experiments. Finally, systematic simulations provide scalings for the energy and charge of the electron pulses. Our results show that the micro-channel plasma target is a promising electron source for applications such as ion acceleration, Bremsstrahlung X-ray radiation, and THZ generation.

Research Organization:
The Ohio State Univ., Columbus, OH (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0003107
OSTI ID:
1515026
Journal Information:
Physics of Plasmas, Vol. 26, Issue 3; ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 36 works
Citation information provided by
Web of Science

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Cited By (8)

Radiation reaction as an energy enhancement mechanism for laser-irradiated electrons in a strong plasma magnetic field journal November 2019
Enhancement of target normal sheath acceleration in laser multi-channel target interaction journal December 2019
Single-pulse laser-electron collision within a micro-channel plasma target journal May 2019
All-optical generation of petawatt gamma radiation via inverse Compton scattering from laser interaction with tube target journal June 2019
Impact of ion dynamics on laser-driven electron acceleration and gamma-ray emission in structured targets at ultra-high laser intensities journal June 2019
Enhanced electron acceleration in aligned nanowire arrays irradiated at highly relativistic intensities journal November 2019
Generation of relativistic high-order-mode laser pulse using plasma waveguide journal August 2019
Impact of ion dynamics on laser-driven electron acceleration and gamma-ray emission in structured targets at ultra-high laser intensities text January 2019

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