1 Oct
2022
1 Oct
'22
5:40 p.m.
On Sep 30, 2022, at 11:19 PM, Tom Hunter
<ccth6600(a)gmail.com> wrote:
https://www.stirlingcryogenics.eu/
These machines are still made and indeed are very cool. ;-)
So to speak!
I didn't see their liquid helium machine. I remember one installed at the TU
Eindhoven physics department; it consisted of a pair of two-stage Stirling machines (which
by themselves will liquify hydrogen or neon, i.e., they go down to about 20 K) plus a
bunch of auxiliary equipment. The whole setup took maybe a 15 foot square room.
The website doesn't show any of the compact machines I remember seeing described. A
bunch of those had 400 Hz power, indicating they were meant for airborne use. One was a
little lab bench machine, a box perhaps the size of an old style desktop PC, lying flat,
with a "cold finger" sticking out of the box.
paul