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Technology Stocks : Conductus (NASDAQ: CDTS) superconductors
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To: Roland Fehrenbacher who wrote (24)4/11/1996 2:08:00 AM
From: Maurice Winn   of 352
 
Roland, I'm starting to feel like an expert!! The He is mentioned in the first sentence of paragraph 2 in a Business Wire quoted by Craig Siebels Reply 5 of 12 in the Superconductor Technologies thread in the Communications stock talk section of Silicon Investor [see further down the list where your Conductus thread is sitting]. They have a proprietary helium gas bearing cryogenic cooler. From that and your comments I conclude that they are using gas rather than liquid as the cooling medium. The advantage would be inert, no phase change at operational temperatures and so little of it in the gas phase [I assume not pressurized significantly] that the relative cost of N2 versus Helium wouldn't matter. How cold do these Cu layered superconductors need to be? I thought something like -90 deg C. What temp does He liquify at atmospheric pressure? Seems okay to me to do it the way they are [and it obviously works okay]. It is all very interesting.
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