Intense electron beam emission from carbon nanotubes and mechanism
Creators
- 1. State Key Laboratory for Advanced Metals and Materials, Department of Materials Physics, University of Science and Technology Beijing, 30 Xueyuan Road, Beijing 100083 (China)
- 2. Institute of Fluid Physics, Chinese Academy of Engineering Physics, Mianyang 621900 (China)
Description
A large area explosive emission cold cathode has been fabricated using carbon nanotube (CNT) emitters. The emission characteristics of the CNT cathode have been measured in two different pulse modes. A high emission current density of 344 A cm-2 has been realized at an applied electric field of 16.7 V μm-1 and the current density maintained at 160 A cm-2. The distribution and intensity of the electron beams on the cathode surface were investigated. The emission model of the cathode applied with pulse electric field was established and the pulsed emission mechanism of CNTs was explosive electron emission. Meanwhile, the formation of the cathode plasma layer was found. Such a cathode design can be expected to be utilized as a high-current, large area emitter
Additional details
Identifiers
- DOI
- 10.1088/0022-3727/40/21/022;
- PII
- S0022-3727(07)57755-7;
Publishing Information
- Journal Title
- Journal of Physics. D, Applied Physics
- Journal Volume
- 40
- Journal Issue
- 21
- Journal Page Range
- p. 6626-6630
- ISSN
- 0022-3727
- CODEN
- JPAPBE
INIS
- Country of Publication
- United Kingdom
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 39035083
- Subject category
- S71: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS;
- Descriptors DEI
- CARBON; CATHODES; CURRENT DENSITY; ELECTRIC FIELDS; ELECTRON BEAMS; ELECTRON EMISSION; NANOTUBES; PLASMA; PULSES
- Descriptors DEC
- BEAMS; ELECTRODES; ELEMENTS; EMISSION; LEPTON BEAMS; NANOSTRUCTURES; NONMETALS; PARTICLE BEAMS