Laser-heated capillary discharge waveguides as tunable structures for laser-plasma acceleration

Pieronek, C. V.; Gonsalves, A. J.; Benedetti, C.; Bulanov, S. S.; van Tilborg, J.; Bin, J. H.; Swanson, K. K.; Daniels, J.; Bagdasarov, G. A.; Bobrova, N. A.; Gasilov, V. A.; Korn, G.; Sasorov, P. V.; Geddes, C. G. R.; Schroeder, C. B.; Leemans, W. P.; Esarey, E.

doi:10.1063/5.0014961

Laser-heated capillary discharge waveguides as tunable structures for laser-plasma acceleration

Journal Article · Tue Sep 01 00:00:00 EDT 2020 · Physics of Plasmas

DOI:https://doi.org/10.1063/5.0014961· OSTI ID:1782178

^[1]; ^[2]; Benedetti, C. ^[2]; ^[2]; van Tilborg, J. ^[2]; ^[2]; ^[1]; ^[2]; Bagdasarov, G. A. ^[3]; Bobrova, N. A. ^[3]; ^[3]; Korn, G. ^[4]; ^[5]; ^[2]; ^[1]; ^[2]; Esarey, E. ^[2]

Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Russian Academy of Sciences (RAS), Moscow (Russia). Keldysh Institute of Applied Mathematics
Institute of Physics ASCR, v.v.i. (FZU), Prague (Czech Republic)
Russian Academy of Sciences (RAS), Moscow (Russia). Keldysh Institute of Applied Mathematics; Institute of Physics ASCR, v.v.i. (FZU), Prague (Czech Republic)

Laser-heated capillary discharge waveguides are novel, low plasma density guiding structures able to guide intense laser pulses over many diffraction lengths and have recently enabled the acceleration of electrons to 7.8 GeV by using a laser-plasma accelerator (LPA). These devices represent an improvement over conventional capillary discharge waveguides, as the channel matched spot size and plasma density can be tuned independently of the capillary radius. This has allowed the guiding of petawatt-scale pulses focused to small spot sizes within large diameter capillaries, preventing laser damage of the capillary structure. High performance channel-guided LPAs require control of matched spot size and density, which experiments and simulations reported here show can be tuned over a wide range via initial discharge and laser parameters. In this paper, measurements of the matched spot size and plasma density in laser-heated capillary discharges are presented, which are found to be in excellent agreement with simulations performed using the MHD code MARPLE. Strategies for optimizing accelerator performance are identified based on these results.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)

Sponsoring Organization:: European Regional Development Fund (ERDF); National Science Foundation (NSF); Russian Foundation for Basic Research (RFBR); USDOE; USDOE Office of Science (SC), High Energy Physics (HEP)

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1782178

Alternate ID(s):: OSTI ID: 1657283

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 9 Vol. 27; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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