Dear all,
I’m running a low-temperature experiment on a Bruker Avance II with
a BBO probe, using LNâ‚‚ VT cooling.
During cooldown, I’m purging/aerating the shim stack with dry N₂
(instead of air) to avoid ice formation. However, the temperature around the
shims drops very quickly and gets down to about 5 °C well before the
sample reaches the target temperature of −70 °C. I’m
a bit concerned about overcooling the shim stack and nearby bore components.
I was wondering if you have any recommendations or best practices for keeping
the shim stack above 0 °C while running low-temperature experiments.
Thank you,
Best regards,
Lenny
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Received on Wed Dec 17 2025 - 03:19:35 MST