Minutes from target meeting held on 12th of December 2002 in 892-2-009

a) The man power from Prague group to target was discussed. Ales Srnka is
specialised to superconducting magnets and NMR. He could be present during
the start up period of the target for about 2 months. Stephan Neliba
has started to work on his diploma. He could be present at CERN 3 - 5 months
possibly part of the time as CERN summer student. During the data taking
Fingers are going to take target shifts. 

b) Yuri summarised the difficulties in 2002 data TE-calibration. Upstream
had problems but average polarisation is ok. Downstream polarisation values
are good, but small coil #6 inside target material shows lower polarisation
than the others outside. This could be due to magnetic skin effect. 
Unfortunately the upstream small coil was broken and thus the polarisation
value can not be compared to a similar coil. The maximum average polarisations
are similar to 2001 data about +57 % and -46%. The polarisation data is 
available from Yuri in Mathematica text file. It has average up- and 
downstream polarisations for D, 6Li, 7Li and p with the solenoid current.
Jaakko showed Kaoris 80% certainty plot of polarisation for all coils.
In Kaoris plot the jumps due to field rotation have been corrected. 
The values are consistent with Yuris results. Lower negative polarisation 
after first microwave polarisation reversal is probably due lack of FM 
possibility because of broken microwave PSU.

c) Jaakko presented preliminary planning for spring 2003: 
http://wwwcompass.cern.ch/compass/detector/target/PTspring03b.html 
The magnet cool down is planned after Easter Monday, which would
give 40 % polarisation on 16th of May. The beam time starts on 19th
of May and thus there is not much room for delays. The possibility to
cool down the magnet with LN2 before Easter was also discussed. Cool down
during Easter would require the new LN2 transfer line from Munich.
If the magnet is cooled down before or during Easter, it will be necessary 
to have target shifts during Easter. The repair of broken Pfeiffer roots
pump needs to be followed closely, since it may create extra delay to the
planning.