Ultra-high gradient channeling acceleration in nanostructures: Design/progress of proof-of-concept (POC) experiments

Y. M. Shin, A. Green, A. H. Lumpkin, R. M. Thurman-Keup, V. Shiltsev, X. Zhang, D. M.A. Farinella, P. Taborek, T. Tajima, J. A. Wheeler, G. Mourou

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations


A short bunch of relativistic particles, or a short-pulse laser, perturb the density state of conduction electrons in a solid crystal and excite wakefields along atomic lattices in a crystal. Under a coupling condition between a driver and plasma, the wakes, if excited, can accelerate channeling particles with TeV/m acceleration gradients [1], in principle, since the density of charge carriers (conduction electrons) in solids n0 = ∼ 1020 - 1023 cm-3 is significantly higher than what was considered above in gaseous plasma. Nanostructures have some advantages over crystals for channeling applications of high power beams. The de-channeling rate can be reduced and the beam acceptance increased by the large size of the channels. For beam-driven acceleration, a bunch length with a sufficient charge density would need to be in the range of the plasma wavelength to properly excite plasma wakefields, and channeled particle acceleration with the wakefields must occur before the ions in the lattices move beyond the restoring threshold. In the case of the excitation by short laser pulses, the dephasing length is appreciably increased with the larger channel, which enables channeled particles to gain sufficient amounts of energy. This paper describes simulation analyses on beam- and laser (X-ray)-driven accelerations in effective nanotube models obtained from the Vsim and EPOCH codes. Experimental setups to detect wakefields are also outlined with accelerator facilities at Fermilab and Northern Illinois University (NIU). In the FAST facility, the electron beamline was successfully commissioned at 50 MeV, and it is being upgraded toward higher energies for electron accelerator R&D. The 50 MeV injector beamline of the facility is used for X-ray crystal-channeling radiation with a diamond target. It has been proposed to utilize the same diamond crystal for a channeling acceleration proof-of-concept (POC). Another POC experiment is also designed for the NIU accelerator lab with time-resolved electron diffraction. Recently, a stable generation of single-cycle laser pulses with tens of Petawatt power based on the thin film compression (TFC) technique has been investigated for target normal sheath acceleration (TNSA) and radiation pressure acceleration (RPA). The experimental plan with a nanometer foil is discussed with an available test facility such as Extreme Light Infrastructure - Nuclear Physics (ELI-NP).

Original languageEnglish (US)
Title of host publicationAdvanced Accelerator Concepts
Subtitle of host publication17th Advanced Accelerator Concepts Workshop, AAC 2016
EditorsKent P. Wootton, Gregory S. Nusinovich, Steven H. Gold
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735414808
StatePublished - Mar 6 2017
Externally publishedYes
Event17th Advanced Accelerator Concepts Workshop, AAC 2016 - National Harbor, United States
Duration: Jul 31 2016Aug 5 2016

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


Conference17th Advanced Accelerator Concepts Workshop, AAC 2016
Country/TerritoryUnited States
CityNational Harbor

Bibliographical note

Funding Information:
This work is supported by the DOE contract No. DEAC02-07CH11359 to the Fermi Research Alliance LLC.

Publisher Copyright:
© 2017 Author(s).


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