@article{Breach:2022:10.1016/j.hedp.2022.101007,
author = {Breach, O and Hatfield, P and Rose, S},
doi = {10.1016/j.hedp.2022.101007},
journal = {High Energy Density Physics},
pages = {1--7},
title = {Optimising point source irradiation of a capsule for maximum uniformity},
url = {http://dx.doi.org/10.1016/j.hedp.2022.101007},
volume = {45},
year = {2022}
}

Download

TY  - JOUR
AB  - Inertial Confinement Fusion involves the implosion of a spherical capsule con-taining thermonuclear fuel. The implosion is driven by irradiating the outsideof the capsule by X-rays or by optical laser irradiation, where in each casethe highest uniformity of irradiation is sought. In this paper we consider thetheoretical problem of irradiation of a capsule by point sources of X-rays, andconfigurations which maximize uniformity are sought. By studying the root-mean-square deviation in terms of different order harmonic modes, we ratio-nalise the dependence of uniformity on distance d of the point sources fromthe centre of a capsule. After investigating simple configurations based onthe Platonic solids, we use a global optimisation algorithm (basin-hopping)to seek better arrangements. The optimum configurations are found to de-pend strongly on d; at certain values which minimise nonuniformity, theseinvolve grouping of sources on the vertices of octahedra or icosahedra, whichwe explain using a modal decomposition. The effect of uncertainties in bothposition and intensity is studied, and lastly we investigate the illuminationof a capsule whose radius is changing with time.
AU  - Breach,O
AU  - Hatfield,P
AU  - Rose,S
DO  - 10.1016/j.hedp.2022.101007
EP  - 7
PY  - 2022///
SN  - 1574-1818
SP  - 1
TI  - Optimising point source irradiation of a capsule for maximum uniformity
T2  - High Energy Density Physics
UR  - http://dx.doi.org/10.1016/j.hedp.2022.101007
UR  - https://www.sciencedirect.com/science/article/pii/S1574181822000301?via%3Dihub
UR  - http://hdl.handle.net/10044/1/99606
VL  - 45
ER  - 

Download