Field-Emission Electron Source Using Carbon Nanotubes for X-ray Tubes

다국어 초록 (Multilingual Abstract)

We have studied the feasibilities of using carbon nanotubes (CNTs)
for the X-ray generation. The CNTs were grown on stainless-steel
(SUS304) substrates by using a rapid thermal chemical vapor
deposition (RTCVD) system and they were examined by scanning
electron microscope and Raman spectroscopy. The CNTs were used to
make field emitters in the triode geometry designed for X-ray
generation. The grid was 500 μm from the cathode and the anode
was 10 mm from the grid. The maximum anode current was measured to
be 2.0 mA when +5.0 kV and --4.0 kV, with the grid grounded, were
applied to the anode and the cathode, respectively. The stability of
the anode current was examined and the X-ray images of biological
structure were obtained using a field-emission CNT X-ray tube.

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