title: X-ray tube with a graphite field emitter inflamed at high temperature.
abstract: The authors developed a class of novel graphite-based field emitters, known as graphite field emitters inflamed at high temperature (GFEIHTs), which includes numerous edges and juts. The GFEIHT field emission characteristics are investigated in a vacuum tube (10-7Pa), and an anode current exceeding 2 mA is obtained. The authors also fabricated tipped-off x-ray tubes using GFEIHTs. No degradation in the anode current is observed under the operating conditions of 16.6 kV anode voltage and 160μA anode current. The current dispersion, defined as the standard deviation (σ)/mean over 24 h, is 2.8%. The authors successfully demonstrated radiography and x-ray fluorescence spectrometry using an x-ray tube with GFEIHT.
authors.affiliation: Research Laboratory, Onizuka Glass Co. Ltd., 3-9-18 Imai, Ome, Tokyo 198-0023, Japan and Research Institute of Electronics, Shizuoka University, 3-5-1 Johoku, Hamamatsu 432-8011, Japan.
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Iwai
authors.forename: Takayoshi
authors.initials: T
authors.lastname: Koike
authors.forename: Youhei
authors.initials: Y
authors.lastname: Hayama
authors.forename: Atsuo
authors.initials: A
authors.lastname: Jouzuka
authors.forename: Tomonori
authors.initials: T
authors.lastname: Nakamura
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Onizuka
authors.forename: Motosuke
authors.initials: M
authors.lastname: Miyoshi
authors.forename: Hidenori
authors.initials: H
authors.lastname: Mimura