Genova Site - Report at SQTF G. Darbo - INFN / Genova SQTF,
January 2005 Genova Site Report C.Gemme, G. Darbo, V.Kostyukhin
INFN / Genova Copy of this talk on the CDS Agenda: Genova Site -
Report at SQTF G. Darbo - INFN / Genova SQTF, January Status of
Loaded Staves in Genova Stave /08/2004 Pre-production stave,
completely characterized, data summary available
at:http://atlas1.ge.infn.it/pixprod/StaveAssembly/
/SUMMARY/http://atlas1.ge.infn.it/pixprod/StaveAssembly/ /SUMMARY/
Stave /10/2004 Initial production stave #1, completely
characterized. On this stave we had a power fail on the chiller
that had the consequence of over heating 6 modules that were
powered. Temperature on the modules NTC reached 8090C. All the
modules tested again after the accident and did not show damages.
data summary available
at:http://atlas1.ge.infn.it/pixprod/StaveAssembly/
/SUMMARY/http://atlas1.ge.infn.it/pixprod/StaveAssembly/ /SUMMARY/
Stave /11/2004 Initial production stave #2, LOAD test performed,
Burn-in. STAVE test underway. The LOAD test have been performed
with a new set of analysis cuts to overcome the effect of HV bias
off in the SURF. Survey has been made, but there was large
difference in temperature (~6C) between loading and survey rooms.
Because all screws were left tight there is a suspect that this
induced a deformation to the stave due to the large CTE of the
aluminum cradle. The module position in Z is 1520 m, while in X
there is a larger error that we think is partially induced by
change of bow due to thermal effect. When the STAVE test will be
finished a new survey will be made.Partially filled data summary
tables:http://atlas1.ge.infn.it/pixprod/StaveAssembly/
/SUMMARY/http://atlas1.ge.infn.it/pixprod/StaveAssembly/ /SUMMARY/
Stave /12/2004 Initial production stave #3, stave loaded, now under
survey. Genova Site - Report at SQTF G. Darbo - INFN / Genova SQTF,
January Robot Upgrade To improve the precision of the loading
robot, 3 additions to the setup are under way: 1)Temperature will
be monitored by a temperature logger with 4 channels. Temperature
probes have been put in thermal contact with support parts of the
robot and also air temperature is monitored. 2)A linear encoder
from Heidenhain, mod. LS-487C, having 5 m precision, have been
ordered. The encoder has a travel of 92 cm and will be used to
monitor and correct the linear Z movement of the robot stage. The
encoder parts will be in genova by mid February. 3)A digital
measuring microscope has been bought and it will be used to measure
the position of the modules in the garage position or on stave. The
microscope is from Keyence, mod.VHX-100 with two zoom lens (25175 X
and 100100 X). It has 18 MPixels resolution and calibrated
measurements in the image plane. Also digital image processing are
available in the system, like depth of focus increase and several
options for image enhance. Genova Site - Report at SQTF G. Darbo -
INFN / Genova SQTF, January Stave T=10C, Room T=0C, Pump Speed 1
Pump Speed Genova Site - Report at SQTF G. Darbo - INFN / Genova
SQTF, January Stave T=-20C, Room T=0C, Pump Speed 18 Pump Speed
Genova Site - Report at SQTF G. Darbo - INFN / Genova SQTF, January
Stave T=0C,-10C,-20C, Room T=0C, Pump Speed 6 Stave Temp. T = 0CT =
-10C T = -20C Genova Site - Report at SQTF G. Darbo - INFN / Genova
SQTF, January Electrical Test The electrical test for LOAD and
STAVE is implemented using 2 SURFs boards. It is planned to add
other 2 to completely automatize the system as soon we will receive
them from LBL. The movement of the source is controlled under
ambush. For next stave the test should run in completely automatic
way. Some new analysis cuts have been defined to overcome to the
"bias effect" on HV off when a module is tested with the SURF.