Документ взят из кэша поисковой машины. Адрес оригинального документа : http://ofvp.phys.msu.ru/en/science_education/diploma/annot/2008/Sidorov_Savelev_en.pdf Дата изменения: Wed Dec 19 10:27:59 2007 Дата индексирования: Mon Oct 1 21:18:00 2012 Кодировка:

Numerical simulations of ion acceleration by relativistic laser pulse interacting with multicomponent dense plasma
by Sidorov Igor Andreevich

Diploma thesis abstract
This work is dedicated to research of high-energy ion bunch generation via ultrarelativistic laser pulse and multilayered multicomponent plasma interaction. Computer program based on 1D2P Particle-in-cell method was developed for these means. Maximum ion bunch energy and spectrum width dependencies on laser pulse properties (intensity and duration) and target parameters (layer number and thickness, atom sort, light ion concentration) are investigated. Optimal light ion layer thickness is calculated, for which accelerated ion energy is maximal (reaches 5 160 MeV for intensities 5 в 1018 5 в

1020 W/cm2 ). Additional calculations showed that optimal thickness rises from 75 to 600
nm with intensity increase from 5 в 1018 to 5 в 1020 W/cm2 and doesn't depend on pulse duration. Also optimal thickness for monoenergetical ion spectrum was calculated. Laser pulse properties dependency investigation showed that optical thickness is lower for high intensities (200 nm for 5 в 1018 W/cm2 and 25 nm for 5 в 1020 W/cm2 ). Program was tested to produce correct results by comparing them to results from analogical analytic and experimental works.

Scientic advisor: associate professor A.B. Savelev-Tromov