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Capturing solar energy solar energy can be captured in two forms either as heat or as electrical energy thermal systems thermal systems capture the suns heat energy infra red radiation in some form of solar collector and use it to mostly to provide hot water or for space heating but the heat can also used to generate electricity by . Nuclear fuel types a nuclear thermal rocket can be categorized by the type of reactor ranging from a relatively simple solid reactor up to the much more difficult to construct but theoretically more efficient gas core reactor. The easiest propellant to manufacture is liquid carbon dioxide it can be produced from the martian atmosphere using just high pressure 690 kpa with no cryogenic cooling needed a 30 horsepower pump will do requiring 25 kw or 80 kilowatt hours per metric ton. Cryogenic bypass diodes have been installed in all superconducting dipole magnets 1232 and all main superconducting quadrupole magnets 392 of the large hadron collider lhc at cern and operated during the physics runs since 2009