User name Higinbotham
Log entry time 13:21:12 on December20,2003
Entry number 114685
keyword=Items Fixed In The Hall
Last night there were problems with the left HRS dipole and with
Q1. The dipole NMR probe would not lock and Q1 would only work
for a subset of momentum.
Today Scot and Ed came in and worked on the problems. Since we
are using a limited momentum range, the NMR probe was set by hand
for moments around 2 GeV. Scot tried to fix Q1, but the problem
did not go away even after he changed all the boards, so we will
need to avoid the problem moments during the run. (The problem
acts like a stuck bit, so we have momentum gaps of 13 MeV.)
Durning the access Ed recooled the shield. By doing this we should
be able to run the magnet for the rest of the weekend without a recool.