Reduced shielding mass for the VISTA spacecraft

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dc.authoridŞAHİNASLAN, Apdulmutalip/0000-0002-5839-9558;
dc.authorwosidŞAHİNASLAN, Apdulmutalip/ABH-4456-2020
dc.authorwosidŞahin, S?mer/C-6252-2013
dc.authorwosidSahin, Haci Mehmet/JEZ-4428-2023
dc.contributor.authorSahin, S
dc.contributor.authorSahin, HM
dc.contributor.authorSahinaslan, A
dc.date.accessioned2024-08-04T21:00:59Z
dc.date.available2024-08-04T21:00:59Z
dc.date.issued2002
dc.departmentİnönü Üniversitesien_US
dc.description.abstractAn innovative concept for the direct utilization of fusion energy with laser ignited (D,T) capsules for propulsion is presented with the so called VISTA (Vehicle for Interplanetary Space Transport Applications) concept. VISTA's overall geometry is that of a 50degrees-half-angle cone to avoid massive radioactive shielding. The 50degrees-half-angle maximizes the jet efficiency, and is determined by selecting the optimum pellet firing position along the axis of the cone with respect to the plane of the magnet coil. The pellet firing position is in the vacuum. Assuming a total fusion power production of 17 500 MW with a repetition rate of 5 Hz and 3500 MJ per shot, the propulsion power in form of charged particles has been calculated as similar to7000 MW, making similar to40% of the total fusion power. About 60% of the fusion energy is carried by the leaking neutrons out of the pellet. Most of them (96%) escape into vacuum without striking the space ship. Only 4% enter the frozen hydrogen expellant in the conical shape (about 50 gr.). Two design limits are discussed, 5 and 1 mW/cm(3). Total peak nuclear heat generation in the coils is calculated as 4.7 mW/cm(3). The peak neutron heating is 1.9 mW/cm(3) and the peak gamma-ray heating density is 2.8 mW/cm(3). However, volume averaged nuclear heat generation in the coils is much lower. It is calculated as 0.18, 0.48, and 0.66 mW/cm(3) for neutron, gamma-ray, and total nuclear heating, respectively. With higher design limits for nuclear heat generation in the coils and using natural lithium in the shielding, it was possible to reduce the net shielding mass from 595 tonne down to 170 tonne, making <3% of the vehicle mass, by a total vehicle mass of VISTA similar to 6 000 tonne.en_US
dc.identifier.endpage196en_US
dc.identifier.issn2193-567X
dc.identifier.issn2191-4281
dc.identifier.issue2Aen_US
dc.identifier.startpage187en_US
dc.identifier.urihttps://hdl.handle.net/11616/103995
dc.identifier.volume27en_US
dc.identifier.wosWOS:000177929800006en_US
dc.identifier.wosqualityQ4en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.language.isoenen_US
dc.publisherSpringer Heidelbergen_US
dc.relation.ispartofArabian Journal For Science and Engineeringen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectspace propulsionen_US
dc.subjectfusion rocketen_US
dc.subjectinertial fusion energyen_US
dc.subject(D,T) pelleten_US
dc.subjectcharged particlesen_US
dc.subjectfrozen hydrogen expellanten_US
dc.subjectmagnetic nozzleen_US
dc.subjectsuperconducting magnetsen_US
dc.subjectnuclear heatingen_US
dc.subjectneutron energyen_US
dc.subjectgamma-ray energyen_US
dc.subjectradiation shieldingen_US
dc.titleReduced shielding mass for the VISTA spacecraften_US
dc.typeArticleen_US

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