Linear electron acceleration in THZ waveguides

E. A. Nanni, W. S. Graves, K. H. Hong, W. R. Huang, K. Ravi, L. J. Wong, G. Moriena, A. Fallahi, R. J.D. Miller, F. X. Kärtner

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

3 Scopus citations


We report the first experimental demonstration of linear electron acceleration using an optically generated single-cycle THz pulse centered at 0.45 THz. 7 keV of acceleration is achieved using 10 μJ THz pulses in a 3 mm interaction length. The THz pulse is produced via optical rectification of a 1.2 mJ, 1 μm laser pulse with a 1 kHz repetition rate. The THz pulse is coupled into a dielectric-loaded circular waveguide with 10 MeV/m on-axis accelerating gradient. A 25 fC input electron bunch is produced with a 60 keV DC photo-emitting cathode. The achievable accelerating gradient in the THz structures being investigated will scale rapidly by increasing the IR pulse energy (100 mJ - 1 J) and correspondingly the THz pulse energy. Additionally, with recent advances in the generation of THz pulses via optical rectification, in particular improvements to efficiency and generation of multi-cycle pulses, GeV/m accelerating gradients could be achieved. An ultra-compact high-gradient THz accelerator would be of interest for a wide variety of applications.

Original languageEnglish (US)
Title of host publicationIPAC 2014
Subtitle of host publicationProceedings of the 5th International Particle Accelerator Conference
PublisherJoint Accelerator Conferences Website (JACoW)
Number of pages4
ISBN (Electronic)9783954501328
StatePublished - Jul 1 2014
Externally publishedYes
Event5th International Particle Accelerator Conference, IPAC 2014 - Dresden, Germany
Duration: Jun 15 2014Jun 20 2014

Publication series

NameIPAC 2014: Proceedings of the 5th International Particle Accelerator Conference


Other5th International Particle Accelerator Conference, IPAC 2014

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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