Designing an approprate solenoid and magnetic field for the HZDR laser-driven beamline

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Abstract

Nowadays, due to the high costs and large dimensions of the conventional proton accelerators, other optimal methods for producing the proton beam have been studied. Using of Laser-driven proton accelerators is one of the important and new methods. In laser-driven ion acceleration, a highly ultra-intense laser pulse interacts with solid density targets and will create a plasma media that will accelerate ions and produce protons. Currently there are projects in this in field such as ELIMED, PMRC, DROT, HZDR and …. Due to the large angular dispersion of protons, reducing their dispersion and collimating them for transmission is very important. In this research, using the GEANT4 toolkit, the exact solenoid and its magnetics field for HZDR beamline have been simulated. The effect of solenoid on protons with a primary divergence of 5 degrees was investigated. The results show that consideration of the details of the solenoid has a direct effect on the calculation of the proton profiles and is necessary. The maximum of the solenoid magnetic field was calculated to ~20 Tesla to fit the proton selector system at a distance of one meter from the source.

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