* the reference cell type (N2) was specified both in the run comment as well as in the shift summary which lists all runs on tape with their basic properties;
* by the Yi's post showed up in the halog, we were done with the run
and switched back to production, so we could not record the in-beam
pressure. After Yi's post, the shift personnel considered returning
to the reference cell measurement for the sole purpose of reading out
the beam-on pressure, but we did not see a compelling reason to do it
(no polarization, no change in density).