Planar ultrananocrystalline diamond field emitter in accelerator radio frequency electron injector: Performance metrics

Year: 2014

Type: article

Abstract: A case performance study of a planar field emission cathode (FEC) based on nitrogen-incorporated ultrananocrystalline diamond, (N)UNCD, was carried out in an RF 1.3 GHz electron gun. The FEC was a 100 nm (N)UNCD film grown on a 20 mm diameter stainless steel disk with a Mo buffer layer. At surface gradients 45–65 MV/m, peak currents of 1–80 mA (equivalent to 0.3–25 mA/cm2) were achieved. Imaging with two YAG screens confirmed emission from the (N)UNCD surface with (1) the beam emittance of 1.5 mm × mrad/mm-rms and (2) longitudinal FWHM and rms widths of non-Gaussian energy spread of 0.7% and 11% at an electron energy of 2 MeV. Current stability was tested over the course of 36 × 103 RF pulses (equivalent to 288 × 106 GHz oscillations).

Source: Applied Physics Letters

DOI: 10.1063/1.4901723

Authors: Sergey V. Baryshev, Sergey Antipov, Jiahang Shao, Chunguang Jing, Kenneth J. Pérez Quintero, Jiaqi Qiu, Wanming Liu, Wei Gai, Alexei D. Kanareykin, Anirudha V. Sumant

Institutions: Argonne National Laboratory, Euclid Techlabs (United States), Center for Nanoscale Materials

Language: English

Topic: Photocathodes and Microchannel Plates

Subfield: Instrumentation

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: U.S. Department of Energy, National Aeronautics and Space Administration, University of Chicago, Office of Science, Basic Energy Sciences, Office of Experimental Program to Stimulate Competitive Research, Argonne National Laboratory, Fermilab

OpenAlex ID: W2069149657