Synthesis of CNT film on Cu and its intense pulsed emission characteristics

Abstract

In order to study intense pulsed emission characteristics of carbon nanotube films (CNTs), CNTs were synthesized on the surface of Cu substrate (Cu-CNTs) by pyrolysis of iron phthalocyanine (FePc). Orientations of CNTs obtained are different from one another. Intense pulsed field emission of CNTs was measured on the 20GW pulse power system using a diode structure. For single pulse emission, the emission current peak of Cu-CNTs increases linearly with pulse field peak, at the applied peak electric field of ～15.5 V/μ; the current peak is ～5.56 kA, and equivalent emission current density is ～0.283 kA/cm2. At the applied peak electric field of ～32.0 V/μ, the current peak can achieve ～18.19kA, and the equivalent emission current density is～0.927 kA/cm2; the ability of emission current of CNTs is obviously better than that reported. In many continuous and similar peak pulse emissions, Cu-CNTs provide with good repeatability of pulsed emission, and present better emission stability.