Every engineer knew Barron’s Cryogenic Systems . It was the bible of the cold. Chapter 14: Emergency Pressure Management in Helium-4 Dewars. She had read it as a grad student, but now, stranded in the most remote lab on Earth, she needed it.
The beeping stopped.
It read: "Young researcher: if you're reading this in an emergency, remember that a helium dewar's vent rate is not linear. Derive the Clausius-Clapeyron relation for the specific case of ortho-para conversion. Turn the needle valve exactly 1.5 turns counter-clockwise, then wait 47 seconds. Do not use the backup pump. And please buy the book next time. – RFB"
Every engineer knew Barron’s Cryogenic Systems . It was the bible of the cold. Chapter 14: Emergency Pressure Management in Helium-4 Dewars. She had read it as a grad student, but now, stranded in the most remote lab on Earth, she needed it.
The beeping stopped.
It read: "Young researcher: if you're reading this in an emergency, remember that a helium dewar's vent rate is not linear. Derive the Clausius-Clapeyron relation for the specific case of ortho-para conversion. Turn the needle valve exactly 1.5 turns counter-clockwise, then wait 47 seconds. Do not use the backup pump. And please buy the book next time. – RFB"