Minutes from weekly target meeting held 24th of October 2001 in 888

Schedule for the following week:

a) Wednesday 16:00 - 24:00 continue EPR measurement. There are some signs of
splitting of EPR line on the negative polarization side, while on the positive
side only one line is seen. The measurement sensitivity has been improved
since Tuesday. Possible noise sources: microwave guide vibration, microwave 
generator stability and bolometric drift of speers. During the EPR measurement
only small polarization loss of about 2 % on the positive side. When the EPR
measurements at high polarizations is finished, destroy polarization 
step-by-step. Take the EPR-lines at these different reduced polarizations
and finally at 0 polarization. This activity should be finished before the 
beam comes back on Thursday evening, since with the beam speer reading may
be unstable.
 
b) Between Thursday 16:00 and Friday 08:00 detune the field of the SMC magnet.
This is done by checking the NMR frequencies and changing the currents to the
trim coils. Field homogeneity of about 100 ppm will be used to simulate the
OIS magnet. Then the polarization is started. The NMR-lines of 6Li and  7Li
are taken at different deuteron polarization levels, e.g at 5 %, 10 %, 15 %,
20 %, 25 %, 30 %, 35 %, 40 % and 45 %. Also the NMR-line of 3He can be taken
as technical check of dilution cryostat operation. For taking the NMR-lines
the trim currents need to be scaled according to the magnetic field.
Of course everything depends on how well the material polarizes in 
inhomogeneous field.

c) If there is extra time, technical run of the dilution cryostat can be
done after the EST experiment.

d) TE-calibration after the full access 5th November 08:00. TE-signals are
taken for D, 6Li and 7Li. It is probably not good idea to start the 
TE-calibration during the beam time, since it may influence the temperature
and thermometer readings. The 3He is pumped out from the dilution cryostat 
and put back to tanks before the TE-calibration starts. The helium-4
level in the mixing chamber has to be checked.