Minutes from target meeting held on 4th of October 2002 in 892-2-009

a) Yuri started to compare old and new TE-calibrations. The dispersion 
part of the NMR-signal was determined from Kronig-Kramers relation.
For coils #1, #3, #6 signal to noise ratio is about 1/1. For other coils 
it is much better. There is large input from the background. Yuri presented
idea to use dispersion asymmetry to determine polarisation, since this is
not expected to depend on the background.

b) Jaakko said that coil by coil calibration before TE-data taking was not
done at full polarisation (about 44 % and -40 %). From the coil by coil
TE-calibration the new polarisation values to replace the approximative
44 % and -40 % have to be produced. These are then compared to the situation
when all the coils are connected with the same overall polarisation. Then 
these values are scaled to the NMR signal areas determined online during 
physics data taking. Also the field reversal and thermometer dependence need
to be corrected.  When only one coil was connected at upstream less than 0.4 % 
dependence on field direction was observed. At the end of NMR files there
is also magnet current data.

c) Yuri said that we need a new spare microwave cooling water unit (about 
2 kCHF), since we will use the EIO tubes for polarisation next year.

d) Fabrice cancelled Agilent spectrum analyser plan (about 20 KCHF). 
Kaori promised to ask such a device from Nagoya. Jaakko suggested Electronics 
pool. Fabrice said that the control room should be cleaned. The pump room
lock was discussed. It was generally agreed that we should have separate
key from the other collaboration. 

e) Norihiro contacted Oxford Instruments for the service of LN2 level meter.

f) Communications from Eric Weise: the seals of safety valves are expiring.
They need to be checked before run 2003. This includes also pressure 
regulators, since they have small burst disks inside. 

g) Jaakko contacted Alcatel for information about leak tightness of 4He
pump system. Generally Alcatel seems to guarantee leak tightness only
for special "hermetic" series of rotary pumps. For roots pumps typically
10^-7 mbar l/s tightness is guaranteed. M. Delacharlonny from Pfeiffer was
contacted with fax (impossible with phone) for the examination of roots 
pump problem.