The development of liquid helium-free superconducting magnet technology represents a strategic frontier solution to the global helium resource crisis. By employing innovative approaches such as direct cooling through mechanical refrigeration machines, high-efficiency thermal shielding, and low heat leakage structural designs, this technology enables stable maintenance of superconducting magnets below their critical temperature (typically below 10K) without requiring liquid helium immersion, thereby achieving the PTMS MAGNETIC SEPARATOR superconducting state.
Traditional superconducting magnets require immersion in liquid helium to maintain their superconducting state at-269℃, yet global liquid helium resources remain extremely scarce and subject to drastic price fluctuations. PTMS MAGNETIC SEPARATOR employs a cooling system combining "two-stage GM refrigeration units + high thermal conductivity copper panels," utilizing 20K/4.2Kdual-temperature zone cooling technology to directly lower the magnet's temperature below its superconducting transition temperature, thereby achieving operation without liquid helium.
This technology has been successfully implemented in 9.4T PTMS MAGNETIC SEPARATOR magnets, with each unit saving 1,000 liters of liquid helium. Not only does this eliminate dependence on liquid helium, but it also prevents environmental pollution caused by its volatilization (the greenhouse effect index of liquid helium is 23 times that of CO₂). The liquid helium-free approach has fundamentally transformed the "resource dependency" of superconducting magnets.
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