Hi spinlanders,
We (hopefully) finished troubleshooting an issue with our helium recovery
system this week. It was maintaining the accumulated volume but failing to
liquify any additional gas into the production dewar. Turned out the automated
threshold settings were out of sync with our magnet's boil off rates. During
our communications with the manufacturer a curious question came up.
The HRS design is a closed loop. We have medium pressure storage tanks rather
than a gas collection bag, and it's an all-in-one system. Gas is pulled directly
from the header into a purifier, and from there goes to the liquefier. Under
high exhaust conditions, such as a helium fill, the gas is temporarily redirected
towards the MPT's, and purified/liquefied later. We discussed variable boil off
rates due to weather patterns, and the manufacturer suggests that under this system
the magnet boiloff should be agnostic to atmospheric changes.
Now I can empirically attest that my magnets are still an effective weather-wise.
And it has me pondering, why? Perhaps the manufacturer was mistaken on this
detail. Or, perhaps it's a clue that something else still requires my attention.
My instincts lean towards the former, but I've learned to check the alternative
just in case. Anyone have an opinion they'd be willing to share?
Kind regards,
Luke
Luke Fulton, PhD
CHEM BLDG R003
NMR Core Facility Director
Unit 3060
COR2E & Department of Chemistry
55 N Eagleville Road
University of Connecticut
Storrs, CT 06279
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Received on Thu Feb 05 2026 - 13:24:22 MST