First Operation of an Ungated Diamond Field-Emission Array Cathode in a L-Band Radiofrequency Electron Source

P. Piot; C. A. Brau; B. K. Choi; B. Blomberg; W. E. Gabella; B. Ivanov; J. Jarvis; M. H. Mendenhall; D. Mihalcea; S. Panuganti; P. Prieto; J. Reid

doi:10.1063/1.4884375

First Operation of an Ungated Diamond Field-Emission Array Cathode in a L-Band Radiofrequency Electron Source

Accelerator Physics 2014-07-07 v1

Authors: P. Piot , C. A. Brau , B. K. Choi , B. Blomberg , W. E. Gabella , B. Ivanov , J. Jarvis , M. H. Mendenhall , D. Mihalcea , S. Panuganti , P. Prieto , J. Reid

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Abstract

We report on the first successful operation of a field-emitter-array cathode in a conventional L-band radio-frequency electron source. The cathode consisted of an array of $\sim 10^6$ diamond diamond tips on pyramids. Maximum current on the order of 15~mA were reached and the cathode did not show appreciable signs of fatigue after weeks of operation. The measured Fowler-Nordheim characteristics, transverse beam density, and current stability are discussed. Numerical simulations of the beam dynamics are also presented.

Keywords

field-emission array cathode diamond tips L-band radiofrequency electron source Fowler-Nordheim characteristics beam dynamics current stability transverse beam density

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@article{arxiv.1402.6999,
  title  = {First Operation of an Ungated Diamond Field-Emission Array Cathode in a L-Band Radiofrequency Electron Source},
  author = {P. Piot and C. A. Brau and B. K. Choi and B. Blomberg and W. E. Gabella and B. Ivanov and J. Jarvis and M. H. Mendenhall and D. Mihalcea and S. Panuganti and P. Prieto and J. Reid},
  journal= {arXiv preprint arXiv:1402.6999},
  year   = {2014}
}

Comments

4 pages, 7 figures; preprint submitted to Applied Physics Letters

First Operation of an Ungated Diamond Field-Emission Array Cathode in a L-Band Radiofrequency Electron Source

Abstract

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