Lab Book 2014_05_13 Hamilton Carter
Summary
After fixing the crusty battery cable in the car this morning, I got to do a little bit of work around the lab before the end of the day. We met and discussed the special relativity work today as well. Fermi-Walker transport makes sense as just being the acceleration normal to the tangential velocity that changes the direction of the tangential velocity.
The hose between the auxiliary roughing pump and the leak detector was attached. The auxiliary pump is used to rough out the volum to be leak detected before using a valve on the leak detector to attach the built in diffusion pump to the volume to attain a much higher vacuum, (in the range of 10E-8 Torrs).
The added hose used the fittings I built a few weeks ago to attach the system. There’s an intermediate piece that contains an O-ring that fits between the KF fitting on the hose and the pump assembly.
New KF fitting I
constructed
O-ring fitting that
fits between the two KF fittings
Break-away fitting
clamp
Half of clamp
enclosing hose and pump fitting with interfacing O-ring
Completely clamped
connection
The liquid nitrogen Dewar still had liquid in it, but
apparently the lid flange was leaking.
This was not allowing any pressure to build up and so the liquid
nitrogen was not exiting the Dewar. The
liquid level was 26 inches as of about 4:30 PM today. I’ll measure again tomorrow. We may leak detect a very large liquid helium
Dewar along with the glass and fiberglass Dewars. I need to locate heating tape so we can
heat up the Dewar to re-activate the active carbon filter inside.
I worked more on QFT in rotating frames as well. My original calculations showing that gamma
doesn’t participate in the transverse Lorentz force may be incorrect. I’ve started a new derivation approaching the
problem from the direction of four
force. The check and a few notes on Fermi-Walker
transport can have been added
to the paper positing that the number operator might not be valid for
circular motion.
Current pdf version of relativistic work
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