High intensity, plasma-induced electron emission from large area carbon nanotube array cathodes

Journal Article · Mon Feb 15 04:00:00 UTC 2010 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3313944· OSTI ID:21347279

Qingliang, Liao; Ya, Yang; Junjie, Qi; Yue, Zhang; Yunhua, Huang ^[1]; Liansheng, Xia ^[2]; Liang, Liu ^[3]

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1. Department of Materials Physics, State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083 (China)
2. Institute of Fluid Physics, Mianyang 621900 (China)
3. Department of Physics, Tsinghua-Foxconn Nanotechnology Research Center, Tsinghua University, Beijing 100084 (China)

The plasma-induced electron emission properties of large area carbon nanotube (CNT) array cathodes under different pulse electric fields were investigated. The formation and expansion of cathode plasmas were proved; in addition, the cathodes have higher emission current in the double-pulse mode than that in the single-pulse mode due to the expansion of plasma. Under the double-pulse electric field of 8.16 V/mum, the plasma's expansion velocity is about 12.33 cm/mus and the highest emission current density reached 107.72 A/cm{sup 2}. The Cerenkov radiation was used to diagnose the distribution of electron beams, and the electron beams' generating process was plasma-induced emission.

• OSTI ID: 21347279
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 7 Vol. 96; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
BEAMS
CARBON
CATHODES
CHEMISTRY
CHERENKOV RADIATION
CURRENT DENSITY
ELECTRIC FIELDS
ELECTROCHEMISTRY
ELECTRODES
ELECTROMAGNETIC RADIATION
ELECTRON BEAMS
ELECTRON EMISSION
ELECTRONS
ELEMENTARY PARTICLES
ELEMENTS
EMISSION
EXPANSION
FERMIONS
FIELD EMISSION
LEPTON BEAMS
LEPTONS
NANOSTRUCTURES
NANOTUBES
NONMETALS
PARTICLE BEAMS
PLASMA
PLASMA EXPANSION
PULSES
RADIATIONS