Thermal performance of a meter-scale horizontal nitrogen Pulsating Heat Pipe

•Experimental study of a 1 m long horizontal pulsating heat pipe (PHP).•Two-phase nitrogen as working fluid (77 K).•Maximum equivalent thermal conductivity of 85 kW/m·K and maximum heat load of 25 W.•Dry-out phenomenon characterized.•PHP stable during 7 h at 20 W. Cooling dry superconducting magnets...

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