1. Module Loading Site Qualification G. Darbo - INFN / Genova SQTF, 25 / 11 / 2004 Module Loading TF - Genova Site G. Darbo - INFN / Genova November 25, 2004 Copy of this talk on the CDS Agenda: http://www.ge.infn.it/ATLAS/SQTF/Minutes/Minutes_04-11-25_aux/

2. Module Loading Site Qualification G. Darbo - INFN / Genova SQTF, 25 / 11 / 2004 2 Cooling & Thermal Cycles  Cooling circuit modified:  Lauda RK20-KS with Ethylene Glycol (75%) + H2O (25%) running at - 30ºC to cool the box at ~ -3º  Lauda RP855C with C8F18 to cool or thermal cycle the stave.  Problems encountered with Lauda chillers:  Lauda RP845 break down, under repair -> Given a new and more powerful version in evaluation: RP855 -> faulty behaviour from time to time of the refrigerator…  Lauda RP855 has a pressure/suction pump (see next slide) for fluid circulation in the application. We suspect that the suction generates cavitations in the C8F18 (bubbling) -> fluid lost.  The system is now capable to run thermal cycles between ±30º on the power off modules (see slide)

3. Module Loading Site Qualification G. Darbo - INFN / Genova SQTF, 25 / 11 / 2004 3 Lauda RP855 Pressure/Suction Pump

4. Module Loading Site Qualification G. Darbo - INFN / Genova SQTF, 25 / 11 / 2004 4 Thermal Cycles

5. Module Loading Site Qualification G. Darbo - INFN / Genova SQTF, 25 / 11 / 2004 5 Stave S4028 - Electrical Test  LOAD test completed:  Some dead pixel on the first row of several chip (see last week presentation) are not really bad - they respond to source.  Thermal cycles done  STAVE test underway

6. Module Loading Site Qualification G. Darbo - INFN / Genova SQTF, 25 / 11 / 2004 6 S4024 - Robot Upgrade  Third production stave under loading  11 modules loaded -> completed tomorrow.  A Heidenhain Linear Encoder will be added to verify/correct the Z movement of the robot  A better visual inspection/measure digital microscope is under evaluation to improve module positioning in the garage position and to improve the Z precision of the CMM.