>Last time I 'heard' anything they were
>trying to use ultrasonic not-quite-so standing waves
>to pump the helium around.

Hmm, my current project is to simulate a J-T cooler which uses piston pumps,
so they can develop software for a DSP in the drive electronics without
having to run an expensive-to-run cooler and risk damaging it. ;)

Did hear something about an ultrasonic method of pumping as well, but it was
going to be another project.

--
http://www.piclist.com hint: To leave the PICList
mailto:piclist-unsubscribe-request@mitvma.mit.edu