Parametric emittance measurements of electron beams produced by a laser plasma accelerator

Barber, S. K.; Tilborg, J. van; Schroeder, C. B.; Lehe, R.; Tsai, H-E; Swanson, K. K.; Steinke, S.; Nakamura, K.; Geddes, C. G. R.; Benedetti, C.; Esarey, E.; Leemans, W. P.

doi:10.1088/1361-6587/aab6cd

Title: Parametric emittance measurements of electron beams produced by a laser plasma accelerator

Journal Article · 04 April 2018 · Plasma Physics and Controlled Fusion

DOI: https://doi.org/10.1088/1361-6587/aab6cd · OSTI ID:1440963

^[1]; Tilborg, J. van ^[1]; Schroeder, C. B. ^[1]; Lehe, R. ^[1]; Tsai, H-E ^[1]; Swanson, K. K. ^[2]; Steinke, S. ^[1];

^[1]; Geddes, C. G. R. ^[1]; Benedetti, C. ^[1]; Esarey, E. ^[1]; Leemans, W. P. ^[2]

Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States). Dept. of Physics

Laser plasma accelerators (LPA) offer an exciting possibility to deliver high energy, high brightness electrons beams in drastically smaller distance scales than is typical for conventional accelerators. As such, LPAs draw considerable attention as potential drivers for next generation light sources and for a compact linear collider. In order to asses the viability of an LPA source for a particular application, the brightness of the source should be properly characterized. Here in this paper, we present charge dependent transverse emittance measurements of LPA sources using both ionization injection and shock induced density down ramp injection, with the latter delivering smaller transverse emittances by a factor of two when controlling for charge density. The single shot emittance method is described in detail with a discussion on limitations related to second order transport effects. The direct role of space charge is explored through a series of simulations and found to be consistent with experimental observations.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: Gordon and Betty Moore (GBMF); National Science Foundation (NSF); USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation (NA-20)

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1440963

Journal Information:: Plasma Physics and Controlled Fusion, Journal Name: Plasma Physics and Controlled Fusion Journal Issue: 5 Vol. 60; ISSN 0741-3335

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

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Title: Parametric emittance measurements of electron beams produced by a laser plasma accelerator

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