Paper VT-TuP3
Testing Pump Speed & Thermal Loading of Titanium Arc-Gettered High Speed (~2,000 m3/s for H2) Cryoboxes
Tuesday, November 8, 2016, 6:30 pm, Room Hall D
We have a need for very high pump speed for H2 and D2 with a finite capacity that can be periodically refreshed. Special pumps are being developed to achieve SH2 ~ 2,000 m3/s and SD2 ~ 1,500 m3/s with an inlet area of 10 m2 that fits within our 15 m3 vessel. The pumps are an array of LN2 (Liquid Nitrogen) cooled cryoboxes with multifaceted surfaces that are coated with titanium using cathodic-arc gettering. Since these are rather large cryoboxes, ~1m2 inlet area each, the standard AVS test dome pump speed method is not practical in our case. This poster will present our own test methods, which are guided by and checked against simulated pump speeds using Molflow+. Additionally, experimental cooling and thermal stress tests will be presented on the cryoboxes and VCR fittings used to make the LN2 connections between pumps. This will be compared to our simulated cooling and thermal stress analysis.