Development of planar x-ray source using gated carbon nanotube emitter

摘要

A planar x-ray source using gated carbon nanotube (CNT) emitters was developed. In the diode structure measurement, the turn-on electric field of the CNT cathode was approximately 1.2 V/μm. In the triode structure measurement, characteristic x-ray peaks of Cu and bremsstrahlung x-rays were observed. The maximum energies of the bremsstrahlung x-rays were in agreement with anode voltages. Pulse x-rays synchronized with pulsed gate voltages. Clear x-ray transmission images with high spatial resolution ≤ 165 μm were obtained.