42.4: Application of A Novel Dynode Structure to CNT Field Emission Unit

Abstract

A novel 3-fold dynode structure was introduced into the CNT-FED for improving its uniformity and electron amplification. The 0.5" and 5.6" dynode of metal plates was etched with numerous holes of various cross-sections and coated oxides to supply high efficient passage for electrons. Experiments have been carried out to study the effects of oxides and oxide film thickness on the electron multiplication of dynodes. We observed that several metal plates not only shield the cathode from the high electric field of anode, but also distribute uniform electrons inside each pixel cavity. At present the 3-fold dynode exhibits electron multiplication factors larger than, but close to, unity.