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

这项提案寻求资金支持，以购买设备来重新液化低温设备中沸腾的氦。再冷器将在麦克马斯特低温高场实验室(Mac LTHF Lab)全年连续使用。我于2002年在布罗克豪斯材料研究所创建了Mac LTHF实验室，资金来自NSERC、CFI(加拿大创新基金会)、OIT(安大略省创新信托基金)和麦克马斯特，总预算超过1,000,000美元。它拥有广泛的低温设备，用于核磁共振、运输、交流磁化率、和高压测量。Mac LTHF实验室是目前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，我们布罗克豪斯研究所的液氦液化器无法提供足够数量的液氦。我们最近收购的一台顶装式稀释冰箱和一块16特斯拉超导磁体将加剧麦克马斯特的氦短缺。*为了从对Mac LTHF实验室的巨额财务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和足够的液氦。拟议的收购不仅将解决氦短缺的问题，而且还大大节省了Mac LTHF实验室的运营成本。未来5年，我们节省的运营成本总额将超过收购再液化器的适度成本(50,080美元)。

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.