The invention relates to a horizontal warm bore liquid helium cryostat used for operating super conducting magnets for magnetic separators, said cryostat being provided with a warm bore (11) to locate process modules, liquid helium (14) being placed in a helium container (3), a super conducting magnet (6) being disposed in the helium container (3), primary (4) and secondary (5) radiation shields being provided within the cryostat to minimize radiation heat input, the vertical access neck of the helium chamber (3) interfaced to a helium recondenser (1) having three cooling stages to intercept the conduction heat load, the said cooling stages connected to radiation heat shields (4,5) and a heat exchanger finned surface which condenses evaporated liquid helium, characterized in that said radiator heat shields (4,5) are cooled to different temperatures by cryocooler (2) as well as by helium recondenser (1).
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