A fine-focusing x-ray source using carbon-nanofiber field emitter

Journal Article · Sun Aug 15 00:00:00 EDT 2010 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3475213· OSTI ID:21476433

Sugimoto, W; Sugita, S; Sakai, Y; Goto, H; Watanabe, Y; Ohga, Y; Kita, S ^[1]; Ohara, T ^[2]

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1. Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555 (Japan)
2. Topcon Corporation, 75-1 Hasunuma-cho, Itabashi-ku, Tokyo 174-8580 (Japan)

A fine-focusing x-ray source has been constructed employing a field electron emitter prepared by growing carbon-nanofibers (CNFs) on a metal tip. The x-ray source is composed of a CNF field electron emitter, an electrostatic lens, two magnetic lenses, and a W-target for generating x-rays by electron impact. The CNFs provided field electrons with a current density of J{approx}5x10{sup 9} A/m{sup 2}, which was evaluated with the aid of Fowler-Nordheim theory. The electron beam extracted from the CNF emitter was accelerated to the energies of E=10-25 keV, and then focused by the lenses. By recording the x-ray images of test charts, the optimum resolution of the x-ray source was estimated to be approximately D{sub x}=0.5 {mu}m.

• OSTI ID: 21476433
• Journal Information: Journal of Applied Physics, Vol. 108, Issue 4; Other Information: DOI: 10.1063/1.3475213; (c) 2010 American Institute of Physics; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

07 ISOTOPES AND RADIATION SOURCES
77 NANOSCIENCE AND NANOTECHNOLOGY
BEAM EXTRACTION
CARBON FIBERS
CURRENT DENSITY
ELECTRON BEAMS
ELECTRON EMISSION
ELECTRONS
ELECTROSTATIC LENSES
FOCUSING
FOWLER-NORDHEIM THEORY
KEV RANGE
NANOSTRUCTURES
X RADIATION
X-RAY SOURCES
BEAMS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
EMISSION
ENERGY RANGE
FERMIONS
FIBERS
IONIZING RADIATIONS
LENSES
LEPTON BEAMS
LEPTONS
PARTICLE BEAMS
RADIATION SOURCES
RADIATIONS