Jeff visits the ESR Lab

Rod was doing electron spin resonance (ESR) research at this time with Bill Nelson. Since it involved liquid nitrogen, Jeff was interested and went in to the lab with Rod on July 28. He is looking at the powerful magnet used in the research. The sample is between the magnet poles, and you can see the vapor from the liquid nitrogen venting from the sample chamber.

Transferring liquid nitrogen at 77K above absolute zero causes frost buildup on the transfer line.

Jeff got to pour liquid nitrogen into the sample storage chamber.

We froze a section of tomato in liquid nitrogen and shattered it on the floor. Big mistake! It thawed before we could find all the pieces and made a big mess. In the past we had just frozen grapes, which just break into two or three pieces.