Posted by Texasmark1 on December 16, 2018 at 04:28:29 from (172.242.9.56):
In Reply to: Degrees Kelvin posted by Geo-TH,In on December 15, 2018 at 06:18:41:
We were shut down, not too long after the Sam Donaldson 60 Minutes program on the subject before we finished it, but the focusing magnets for the Superconducting Super Collider's 2 ionic beams, in the 54 mile (circumference) main loop were (to be) cryogenically cooled to +4*K.
Design of the collider called for a cryo pump every 5 miles of the loop. A very thin, sophisticated, insulation sheet was developed for the purpose. I don't remember how many layers, nor the exact makeup, were wrapped around the two tubes and surrounding focusing magnets. I was part of the design team for the Drift Tube and Couple Cavity Linear Accelerators which energized the beam before being injected into the 2 accelerating loops and then the main beam. Quite an undertaking I assure you.
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Today's Featured Article - An Old-Time Tractor Demonstration - by Kim Pratt. Sam was born in rural Kansas in 1926. His dad was a hard-working farmer and the children worked hard everyday to help ends meet. In the rural area he grew up in, the highlight of the week was Saturday when many people took a break from their work to go to town. It was on one such Saturday in the early 1940's when Sam was 16 years old that he ended up in Dennison, Kansas to watch a demonstration of a new tractor being put on by a local dealer. It was an Allis-Chalmers tractor dealership,
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