Open AccessOutgassing mass spectrum analysis with intense pulsed emission of carbon nanotube cathode
Author(s) -
Shen Yi,
Huang Zhang,
Xingguang Liu,
Liansheng Xia,
Yang An-Min
Publication year - 2011
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.60.080702
Subject(s) - cathode , outgassing , materials science , carbon nanotube , quadrupole mass analyzer , field electron emission , atomic physics , plasma , electron , mass spectrometry , analytical chemistry (journal) , nanotechnology , physics , chemistry , nuclear physics , chromatography , quantum mechanics , astronomy
The outgassing mass spectrum property with intense pulsed emission of the carbon nanotube(CNT) cathode is investigated on a 2 MeV linear induction accelerator injector by using the quadrupole mass spectrometer. The results show that the cathode has a capability of desorbing gases from the CNT cathode under pulsed high voltage. There are significant CO2, N2(CO) and H2 desorbing gases which play an important role in the formation of the cathode plasma. The mechanism of electron emission of CNT cathode is plasma-induced field emission, rather than explosive field emission, which is proved by analyzing the desorbed gases component.