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Title: Control of tunable, monoenergetic laser-plasma-accelerated electron beams using a shock-induced density downramp injector

Control of the properties of laser-plasma-accelerated electron beams that were injected along a shock-induced density downramp through precision tailoring of the density profile was demonstrated using a 1.8 J, 45 fs laser interacting with a mm-scale gas jet. The effects on the beam spatial profile, steering, and absolute energy spread of the density region before the shock and tilt of the shock were investigated experimentally and with particle-in-cell simulations. By adjusting these density parameters, the electron beam quality was controlled and improved while the energy (30-180 MeV) and energy spread (2-11 MeV) were independently tuned. Simple models that are in good agreement with the experimental results are proposed to explain these relationships, advancing the understanding of downramp injection. In conclusion, this technique allows for high-quality electron beams with percent-level energy spread to be tailored based on the application.
Authors:
 [1] ;  [2] ;  [2] ;  [2] ;  [2] ;  [2] ;  [2] ;  [2] ;  [2] ;  [2] ;  [2] ;  [1]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Publication Date:
Grant/Contract Number:
AC02-05CH11231
Type:
Published Article
Journal Name:
Physical Review Accelerators and Beams
Additional Journal Information:
Journal Volume: 20; Journal Issue: 5; Journal ID: ISSN 2469-9888
Publisher:
American Physical Society (APS)
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS
OSTI Identifier:
1360864
Alternate Identifier(s):
OSTI ID: 1440952

Swanson, K. K., Tsai, H. -E., Barber, S. K., Lehe, R., Mao, H. -S., Steinke, S., van Tilborg, J., Nakamura, K., Geddes, C. G. R., Schroeder, C. B., Esarey, E., and Leemans, W. P.. Control of tunable, monoenergetic laser-plasma-accelerated electron beams using a shock-induced density downramp injector. United States: N. p., Web. doi:10.1103/PhysRevAccelBeams.20.051301.
Swanson, K. K., Tsai, H. -E., Barber, S. K., Lehe, R., Mao, H. -S., Steinke, S., van Tilborg, J., Nakamura, K., Geddes, C. G. R., Schroeder, C. B., Esarey, E., & Leemans, W. P.. Control of tunable, monoenergetic laser-plasma-accelerated electron beams using a shock-induced density downramp injector. United States. doi:10.1103/PhysRevAccelBeams.20.051301.
Swanson, K. K., Tsai, H. -E., Barber, S. K., Lehe, R., Mao, H. -S., Steinke, S., van Tilborg, J., Nakamura, K., Geddes, C. G. R., Schroeder, C. B., Esarey, E., and Leemans, W. P.. 2017. "Control of tunable, monoenergetic laser-plasma-accelerated electron beams using a shock-induced density downramp injector". United States. doi:10.1103/PhysRevAccelBeams.20.051301.
@article{osti_1360864,
title = {Control of tunable, monoenergetic laser-plasma-accelerated electron beams using a shock-induced density downramp injector},
author = {Swanson, K. K. and Tsai, H. -E. and Barber, S. K. and Lehe, R. and Mao, H. -S. and Steinke, S. and van Tilborg, J. and Nakamura, K. and Geddes, C. G. R. and Schroeder, C. B. and Esarey, E. and Leemans, W. P.},
abstractNote = {Control of the properties of laser-plasma-accelerated electron beams that were injected along a shock-induced density downramp through precision tailoring of the density profile was demonstrated using a 1.8 J, 45 fs laser interacting with a mm-scale gas jet. The effects on the beam spatial profile, steering, and absolute energy spread of the density region before the shock and tilt of the shock were investigated experimentally and with particle-in-cell simulations. By adjusting these density parameters, the electron beam quality was controlled and improved while the energy (30-180 MeV) and energy spread (2-11 MeV) were independently tuned. Simple models that are in good agreement with the experimental results are proposed to explain these relationships, advancing the understanding of downramp injection. In conclusion, this technique allows for high-quality electron beams with percent-level energy spread to be tailored based on the application.},
doi = {10.1103/PhysRevAccelBeams.20.051301},
journal = {Physical Review Accelerators and Beams},
number = 5,
volume = 20,
place = {United States},
year = {2017},
month = {5}
}