Acquisition of compact helium re-liquefier for McMaster low-temperature high-field laboratory

该提案寻求财政支持，用于购置设备，以恢复从低温设备中蒸发出的氦。 该制冷机将在麦克马斯特低温高场实验室（Mac LTHF实验室）全年连续使用。 我于2002年在布罗克豪斯材料研究所成立了Mac LTHF实验室，该实验室由NSERC，CFI（加拿大创新基金会），OIT（安大略创新信托基金）和McMaster提供资金，总预算超过1，000，000美元。 它有各种各样的低温设备，用于核磁共振，运输，交流磁化率和高压测量。 Mac LTHF实验室是迄今为止麦克马斯特最大的液氦用户。 目前，当Mac LTHF实验室满负荷运行时，我们位于Brockhouse Institute的氦净化器无法提供足够的液氦。 我们最近收购了一台顶装式稀释制冷机和一个16特斯拉的超导磁体，这将加剧麦克马斯特的氦短缺。 为了从对Mac LTHF实验室的大量财政投资中获得最大的科学红利，我们需要确保按时提供负担得起的足够的液氦。 拟议的收购不仅将解决氦气短缺问题，还将大大节省Mac LTHF实验室的运营成本。 我们在未来五年节省的营运成本总额，将超过购置再造炉的适度成本（50，080元）。

This proposal seeks financial support for the acquisition of equipment to re-liquefy helium boil-off from cryogenic equipment.  The reliquefier will be used continuously year-round in McMaster Low-Temperature High-Field Laboratory (Mac LTHF Lab).  I founded Mac LTHF Lab in 2002 in the Brockhouse Institute for Materials Research based on funding from NSERC, CFI (Canadian Foundation for Innovation), OIT (Ontario Innovation Trust), and McMaster, with the total budget exceeding $1,000,000.  It has a wide variety of cryogenic equipment for NMR, transport, ac susceptibility, and high-pressure measurements.  Mac LTHF Lab is by far the biggest user of liquid helium in McMaster.  Currently, our helium liquefier in the Brockhouse Institute is unable to supply sufficient amount of liquid helium when Mac LTHF Lab is operating at the full capacity.  Our recent acquisition of a top-loading dilution refrigerator and a 16 Tesla superconducting magnet will exacerbate the helium shortage in McMaster.  In order to gain the maximum scientific dividend from the large financial investment into Mac LTHF Lab, we need to ensure that affordable and sufficient liquid helium is available on time.  The proposed acquisition will not only resolve the helium shortage issue, but also yield significant savings of the operational cost of Mac LTHF Lab.  The total savings of our operational cost in the coming 5 years will exceed the modest cost of the acquisition ($50,080) of the re-liquefier.