Open AccessA Monte Carlo simulation of secondary electron transport in diamond
Author(s) -
Peng Li,
X. R. Zhou,
Pan Li,
Xingfan Yang
Publication year - 2012
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.61.078503
Subject(s) - monte carlo method , diamond , photocathode , thermal emittance , electron , physics , computational physics , secondary electrons , saturation velocity , cathode ray , space charge , drift velocity , materials science , optics , beam (structure) , nuclear physics , statistics , mathematics , composite material
The diamond-amplifier photocathode (DAP) offers a new widely applicable way to generate high average-current, high brightness, and low thermal emittance electron beams. Physical processes with multiple parameters are important for the design of a reliable and efficient DAP. To perfom a study in-depth, a 2D Monte Carlo model in MATLAB frame is built to simulate the secondary electron transport in diamond. This simulation gives some proofs that the drift velocity is sensitive to diamond temperature and electric field applied, but not sensitive to the low impurity density(1017/cm-3). As an appropriate result, the saturation velocity of secondary electron reaches 1.88?107 cm/s, and mobility without applied field is 3732 cm2 /V.s. In addition, some properties of a secondary electron bunch transported in diamond are discussed, which indicate that the effect of space charge under our considered electron cloud density is small.