Open AccessSpatial rainbows and catastrophes in transmission of protons through electrostatic octopole lens
Author(s) -
N Igor Telečki,
M Sanja Grujovic-Zdolsek,
S. Petrović
Publication year - 2018
Publication title -
nuclear technology and radiation protection
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.31
H-Index - 16
eISSN - 1452-8185
pISSN - 1451-3994
DOI - 10.2298/ntrp180910008t
Subject(s) - proton , lens (geology) , physics , optics , kinetic energy , beam (structure) , electrostatic lens , transverse plane , transmission (telecommunications) , atomic physics , nuclear physics , classical mechanics , electrical engineering , structural engineering , engineering
This paper considers transmission of initial parallel proton beam with kinetic energy of 10 k?V through electrostatic octopole lens. The spatial rainbows and corresponding proton distributions are calculated by using infinite length approximation potential. Positive potentials of the lens electrodes are set to be 0.35 kV and 9 kV. It has been shown that by application of catastrophe theory, generating function for mapping proton positions between entrance and exit transverse plains can be determined, giving accurate rainbow patterns for biasing potentials of 0,35 kV.