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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 (10-7 Pa), 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 160 μA 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.
Published in:
Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures
(Volume:31
,
Issue:
2
)
Date of Publication: Mar 2013
- Page(s):
- 02B106 - 02B106-4
- ISSN :
- 1071-1023
- Digital Object Identifier :
- 10.1116/1.4769970
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 06 December 2012
- Issue Date :
- Mar 2013
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