Genova Site 2004 Report

1
Genova Site - 2004 Report

• C.Gemme, G. Darbo, V.Kostyukhin INFN / Genova
• Copy of this talk on the CDS Agenda
• http//agenda.cern.ch/fullAgenda.php?idaa036145

2
Status of Loaded Staves in Genova

• Stave 4004 - 18/08/2004Pre-production stave,
  completely characterized, data summary available
  athttp//atlas1.ge.infn.it/pixprod/StaveAssembly/
  20212000014004/SUMMARY/
• Stave 4028 -27/10/2004Initial 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
  8090ºC. All the modules tested again after the
  accident and did not show damages. data summary
  available athttp//atlas1.ge.infn.it/pixprod/Stav
  eAssembly/20212000014028/SUMMARY/
• Stave 4024 - 22/11/2004Initial 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 (6ºC) 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 µm,
  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 tableshttp//atlas1.ge.infn.i
  t/pixprod/StaveAssembly/20212000014024/SUMMARY/
• Stave 4048 - 20/12/2004Initial production stave
  3, stave loaded, now under survey.

3
Robot Upgrade

• To improve the precision of the loading robot, 3
  additions to the setup are under way
• 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.
  
• A linear encoder from Heidenhain, mod. LS-487C,
  having 5 µm 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.
• 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.

4
Stave T10ºC, Room T0ºC, Pump Speed 18
By Claudia
4
5
6
8
1
Pump Speed
2
3
4
5
Stave T-20ºC, Room T0ºC, Pump Speed 18
By Claudia
Pump Speed
1
2
3
4
5
6
7
8
6
Stave T0ºC,-10ºC,-20ºC, Room T0ºC, Pump Speed 6
By Claudia
Stave Temp.
T 0ºC
T -10ºC
T -20ºC
7
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.