Minutes from target meeting held December 7 2012 in 892-1-D20

These minutes are available also from:

http://wwwcompass.cern.ch/compass/detector/target/Minutes/2012/

a) Jaakko: test reading AVS46 resistance bridge with RS232 serial connector 
using Perl in linux. See 'ptread' repository.

b) Implementation of frequency modulation to the microwave power supplies was
discussed.

c) Fabrice: dipole and solenoid magnets reassembled and waiting for welding.
Insertion into the liquid helium vessel probably in January. 

d) Different power supply options for the repaired magnet were discussed.
A reserve power supply for the LHC magnet could be used for the dipole magnet
or a new air cooled switching power supply from  
http://www.delta-elektronika.nl/ could be purchased. For the LHC type
PSU the maintenance is in the renting contract. The delta elektronika PSU
has better than 100 ppm stability. One 400 A and 200 A unit need to be
connected in parallel to get the necessary current for the dipole magnet.

For the solenoid magnet the options are to use also a LHC reserve PSU with
nominal 2 kA current, but limiting the output to 700 A and 8 V. The other
possibility is to use the same water cooled Danfysik power supply that was 
used 2006 - 2011 http://www.danfysik.com . 

e) Planning for the removal of the present magnet control system on the 
target platform was discussed. This includes removal of the cables, power
supplies, quench protection system and cryogenic control rack.

f) Kaori: concrete shielding is needed for the Q-meter boxes. About six 
meter long semirigid coaxial cables can be used between the target holder 
and the Q-meters.

g) Fabrice: demineralized and brut cooling water will be cut from April 26 2013
to May 16 2014 in the experimental area. Tap water could be used for testings
during this period except for the magnet, which needs demineralized water.