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Title: Control of quasi-monoenergetic electron beams from laser-plasma accelerators with adjustable shock density profile

The injection physics in a shock-induced density down-ramp injector was characterized, demonstrating precise control of a laser-plasma accelerator (LPA). Using a jet-blade assembly, experiments systematically v aried the shock injector profile, including shock angle, shock position, up-ramp width, and acceleration length. Our work demonstrates that beam energy, energy spread, and pointing can be controlled by adjusting these parameters. As a result, an electron beam that was highly tunable from 25 to 300 MeV with 8% energy spread (ΔE FWHM/E), 1.5 mrad divergence, and 0.35 mrad pointing fluctuation was produced. Particle-in-cell simulation characterized how variation in the shock angle and up-ramp width impacted the injection process. This highly controllable LPA represents a suitable, compact electron beam source for LPA applications such as Thomson sources and free-electron lasers.
Authors:
ORCiD logo [1] ; ORCiD logo [2] ;  [1] ;  [1] ; ORCiD logo [1] ; ORCiD logo [2] ; ORCiD logo [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ; ORCiD logo [2]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States). Dept. of Physics
Publication Date:
Grant/Contract Number:
AC02-05CH11231; PHY-1415596; PHY-1632796
Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 25; Journal Issue: 4; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation (NA-20); USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25); National Science Foundation (NSF)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
OSTI Identifier:
1440961
Alternate Identifier(s):
OSTI ID: 1433046

Tsai, Hai-En, Swanson, Kelly K., Barber, Sam K., Lehe, Remi, Mao, Hann-Shin, Mittelberger, Daniel E., Steinke, Sven, Nakamura, Kei, van Tilborg, Jeroen, Schroeder, Carl, Esarey, Eric, Geddes, Cameron G. R., and Leemans, Wim. Control of quasi-monoenergetic electron beams from laser-plasma accelerators with adjustable shock density profile. United States: N. p., Web. doi:10.1063/1.5023694.
Tsai, Hai-En, Swanson, Kelly K., Barber, Sam K., Lehe, Remi, Mao, Hann-Shin, Mittelberger, Daniel E., Steinke, Sven, Nakamura, Kei, van Tilborg, Jeroen, Schroeder, Carl, Esarey, Eric, Geddes, Cameron G. R., & Leemans, Wim. Control of quasi-monoenergetic electron beams from laser-plasma accelerators with adjustable shock density profile. United States. doi:10.1063/1.5023694.
Tsai, Hai-En, Swanson, Kelly K., Barber, Sam K., Lehe, Remi, Mao, Hann-Shin, Mittelberger, Daniel E., Steinke, Sven, Nakamura, Kei, van Tilborg, Jeroen, Schroeder, Carl, Esarey, Eric, Geddes, Cameron G. R., and Leemans, Wim. 2018. "Control of quasi-monoenergetic electron beams from laser-plasma accelerators with adjustable shock density profile". United States. doi:10.1063/1.5023694.
@article{osti_1440961,
title = {Control of quasi-monoenergetic electron beams from laser-plasma accelerators with adjustable shock density profile},
author = {Tsai, Hai-En and Swanson, Kelly K. and Barber, Sam K. and Lehe, Remi and Mao, Hann-Shin and Mittelberger, Daniel E. and Steinke, Sven and Nakamura, Kei and van Tilborg, Jeroen and Schroeder, Carl and Esarey, Eric and Geddes, Cameron G. R. and Leemans, Wim},
abstractNote = {The injection physics in a shock-induced density down-ramp injector was characterized, demonstrating precise control of a laser-plasma accelerator (LPA). Using a jet-blade assembly, experiments systematically v aried the shock injector profile, including shock angle, shock position, up-ramp width, and acceleration length. Our work demonstrates that beam energy, energy spread, and pointing can be controlled by adjusting these parameters. As a result, an electron beam that was highly tunable from 25 to 300 MeV with 8% energy spread (ΔEFWHM/E), 1.5 mrad divergence, and 0.35 mrad pointing fluctuation was produced. Particle-in-cell simulation characterized how variation in the shock angle and up-ramp width impacted the injection process. This highly controllable LPA represents a suitable, compact electron beam source for LPA applications such as Thomson sources and free-electron lasers.},
doi = {10.1063/1.5023694},
journal = {Physics of Plasmas},
number = 4,
volume = 25,
place = {United States},
year = {2018},
month = {4}
}