Minutes from target meeting held on 14th of February 2003 in 892-1-B09

a) Yuri showed frequency shifts for 2D, 6Li, 7Li NMR-signals versus 
D-polarisation difference between up- and downstream target cells.
Proton data needs to be added. The frequency shifts are averaged over
all coil pairs symmetrically, e.g. #1 and #10, #2 and #9 etc. 2001 EST data 
was used. Jaakko asked about possibility to use 2002 data to get a new
handle to the polarisation. Only top of the NMR-peak was fitted to get center
frequency. Yuri said that the Kramers-Kronig relation is valid only for 
linear system and asked if we could measure also dispersion component of 
the NMR-signal. Kaori said that it can be done but needs 90 degree cable.
Jaakko said that the nonlinearity of the electronics will become easily 
visible and measuring the nonlinearity of the spin system is more difficult.

b) Jaakko said that the summary table Kaori showed in the collaboration
meeting indicated quite high negative polarisation for the upstream target
cell. If the values are correct we made a new negative polarisation record.
Otherwise there can still be small problem in the analysis of the polarisation.
Yuri said that for positive polarisation about +56 - 57 % was obtained and 
for negative about - 48 %. Kaori made comparison plots between her and Yuris 
results. Upstream coils #1 and #2 showed very similar results.

c) Jaakko proposed measurement of the target cell cold volumes for packing 
factor determination. More detailed analysis of the material inside 
target cells needs to be done including Helium and coil material. Basically
we can use 2001 EST data to determine ratio between 7Li/6Li and 
proton/deuterium.

d) Miroslav said that Srnka will be at CERN from 31st March for 3 weeks to 
cool down magnet. Miroslav asked if the Sun computer problem that happened 
twice during field rotation last summer has been solved. The problem seems
to have been related to the shift persons way to use the program and has
not been seen since.

e) Fabrice asked about the possibility to install new English Windows and 
LabVIEW to NMR PC. RICH group gives us their extra oxygen analyser to check
the purity of the returning Helium gas.

f) Kaori was asked by the offline group to produce data table of the 
polarisation. It should include time, solenoid current, average
upstream polarisation, error in upstream polarisation, coils #1 - #5,
average 6Li, average 7Li etc. Error still to be discussed, preliminary 
+-2 % absolute.

g) LN2 line was discussed with Pirotte and Jouve. Jouve will install
an insulated copper pipe on the floor level in the pump room. There will be 
a manual valve next to the LN2 trap. An oxygen deficiency meter with alarm 
could be installed into the pump room.