Pulsed field emission from cold carbon-nanotube cathodes placed in a radiofrequency resonant cavity was observed. The cathodes were located on the backplate of a conventional 1+21-cell resonant cavity operating at 1.3-GHz and resulted in the production of bunch train with maximum average current close to 0.7 Amp\`ere. The measured Fowler-Nordheim characteristic, transverse emittance, and pulse duration are presented and, when possible, compared to numerical simulations. The implications of our results to high-average-current electron sources are briefly discussed.
@article{arxiv.1502.03040,
title = {Amp\`ere-Class Pulsed Field Emission from Carbon-Nanotube Cathodes in a Radiofrequency Resonator},
author = {D. Mihalcea and L. Faillace and J. Hartzell and H. Panuganti and S. M. Boucher and A. Murokh and P. Piot and J. C. T. Thangaraj},
journal= {arXiv preprint arXiv:1502.03040},
year = {2015}
}
Comments
5 pages, 6 figures; submitted to Applied Physics Letters