Open AccessStudy of space charge field based on sheath helix model of TWTS
Author(s) -
Xiao Liu,
Xiaobao Su,
Pu-Kun Liu
Publication year - 2006
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.55.5150
Subject(s) - helix (gastropod) , space charge , physics , dispersion (optics) , electromagnetic field , space (punctuation) , field (mathematics) , charge (physics) , electrical impedance , reduction (mathematics) , coupling (piping) , quantum electrodynamics , optics , materials science , quantum mechanics , electron , geometry , mathematics , computer science , ecology , snail , pure mathematics , metallurgy , biology , operating system
The electromagnetic field of helix TWTs in the sheath model is analyzed. The dispersion and coupling impedance equations are derived and the one-dimensional space charge reduction factor is discussed in detail. The study shows that the difference of the space charge reduction factor between the sheath model and the perfect conducting tube is small at high frequency. The difference can be interpreted as the effect of the sheath helix. The higher frequency electromagnetic field has greater ability to affect the e-beam. Therefore, the space charge reduction factor equation based on the sheath helix model is inappropriate at high frequency.