An experimental setup is operational at the Central Cryogenics Laboratory of the European Organization for Nuclear Research to measure the cooling mechanisms of superfluid 4 He (He II) from prepared ...Rutherford-type superconducting cable stacks to a stagnant He II bath. For novel magnets designed for the so-called high-luminosity large hadron collider upgrade, a segment of a fully impregnated Nb 3 Sn 11T dipole magnet was measured. A dataset on the thermal behavior is presented, with homogeneous heat inputs of up to approximately 4.8 mW cm -3 corresponding to an average steady-state temperature of 3.1 K for the inner layer and 4.0 K for the outer layer when cooled via a 1.9 K He II bath. We discuss the steady state as well as transient behavior observed.
An experimental setup is operational at the Central Cryogenics Laboratory of the European Organization for Nuclear Research to measure the cooling mechanisms of superfluid Formula OmittedHe (He II) ...from prepared Rutherford-type superconducting cable stacks to a stagnant He II bath. For novel magnets designed for the so-called high-luminosity large hadron collider upgrade, a segment of a fully impregnated NbFormula OmittedSn 11T dipole magnet was measured. A dataset on the thermal behavior is presented, with homogeneous heat inputs of up to approximately 4.8 mW Formula Omitted corresponding to an average steady-state temperature of 3.1 K for the inner layer and 4.0 K for the outer layer when cooled via a 1.9 K He II bath. We discuss the steady state as well as transient behavior observed.
Neon (Ne) is a noble gas with great commercial importance, therefore systems for its storage and delivery are of utmost interest. Adsorption-based technologies have great potential for gas storage ...and can be an interesting option for Ne applications. We have measured Ne adsorption equilibrium on the little-studied metal-organic framework Co3(ndc)3(dabco) over wide temperature and pressure ranges, 77–320 K and 0–100 bar, respectively. The determined isosteric heat of adsorption was found to be nearly independent of loading (average value of 3.6 kJ/mol). The adsorption equilibrium data show that 6.1 mol/m3 of Ne can be delivered at 1 bar and 300 K if the gas is loaded at 65 bar and 150 K. However, 18.5 mol/m3 of Ne can be delivered at the same discharge conditions if the storage temperature is decreased to 77 K. On a mass basis, Co3(ndc)3(dabco) shows similar performance for Ne storage as HKUST-1 and slightly lower on a volume basis. Exposing Co3(ndc)3(dabco) to temperatures near 400 K adversely affects its adsorption properties, in spite of the TGA results showing that the structure degrades only at 650 K.
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•Neon adsorption equilibrium was determined on Co3(ndc)3(dabco) MOF.•Experimental studies were performed within 77–320 K and 0–100 bar.•Co3(ndc)3(dabco) potential for Ne storage/delivery is evaluated.•The effect of temperature and aging on the MOF structure is studied.
