9/12/2003Ivan Hruska1 First box prototype –Box design in July ‘03 –Box produced during August ’03 Tested last week in few fingers Small changes necessary for production Next few pieces with implemented changes ordered LV supply prototyping

9/12/2003Ivan Hruska2 Remote control PCB –Designed in July ’03 Readout via ELMB Control via current loops & ELMB DAC Central clock for converters –Components already assembled –6 layer PCB LV supply prototyping

9/12/2003Ivan Hruska3 Fuse holder PCB –Assembled –Ready –Distributes 200VDC to bricks LV supply prototyping

9/12/2003Ivan Hruska4 LV supply prototyping Box assembly –All PCBs fits the box –Cabling work have started

9/12/2003Ivan Hruska5 LV supply prototyping Next steps & needs –Box mechanics Final design in progress Next few pieces ~ 1 month Full production 300 boxes ~ 2 months to deliver from the order Price of box mechanics incl. heatsink max. 250CHF

9/12/2003Ivan Hruska6 LV supply prototyping Next steps & needs – cont. –DCDC converter bricks Ready to debug & “bring it to the work” Work already started –Transformers One sample of new type ready Needs redesign of PCB for 3.3V version Looking for the best technology to cut out secondary windings –ELMB motherboard Ready to test functions Francisca will start software test 22 nd of Sept. Need to design converter clock transmitter Need to build the “USA15 like” infrastructure

9/12/2003Ivan Hruska7 LV supply prototyping Next steps & needs – cont. –Cabling of box In progress ( work is done by Z. Kotek ) Output will be: –Pinout of connector –Cable descriptions - documentation

9/12/2003Ivan Hruska8 Fuse holder PCB –Assembled –Ready –Distributes 200VDC to bricks LV supply prototyping

9/12/2003Ivan Hruska9 LV supply – technical questions “Sense” wires –We have to see what is the voltage inside drawer especially most current consuming channels –Drawer “sense” wiring is independent from LV box –We should not use the “sense” wires for LV brick feedback ! DANGER !

9/12/2003Ivan Hruska10 LV supply – technical questions Technical problem –Leak of residual water from connector to the electronics –Cannot be fitted by box or its components –Possible solutions: Sponge around connector Blotter paper Fixed tubes and connectors outside of box

9/12/2003Ivan Hruska11 LV supply pre-series 100 bricks production –Components ordered –PCB needs changes till the end of September to reach 15 Oct start of assembly –Alumina bars confirmed for middle of October –Transformers ? –Production ready first week of November 12 Remote control boards –Design phase – prototype ready to test –End of September should be tested –Changes necessary –End of october could be ready 12 Fuse boards –Ready –No problem to produce 12 pieces in one week

9/12/2003Ivan Hruska12 LV supply pre-series 12 Boxes –Estimation of time of delivery – End of October Cabling of boxes –In development –12 sets of cables should be ready within 3 weeks since approval –1 week to cable all boxes Cabling of drawers –Repining of connectors –Adding of 200V connector, aux connector & CANbus connector Emulated USA15 infrastructure –Need to be developed and produced Distribution boxes Clock source Current sources Power supplies Software

9/12/2003Ivan Hruska13 LV supply pre-series Putting things together –Bricks Burn-in necessary to do in the oven Test setup needed for 8 – 10 bricks test in parallel –Must be designed –Final mount –Box test Dummy load ready Test setup should be designed 6 hours of run with 130% of nominal load is minimum

9/12/2003Ivan Hruska14 LV supply for TILECAL What is the goal of project ? –256 working LV boxes in the pit –10 years of reliable operation Reliability – High level of quality of design & production LV box pre-series for cosmic test –Nice but delay for final solution –Could lead to lower reliability of result

9/12/2003Ivan Hruska15 LV supply for TILECAL Schedule in MS Project –Still lot of unknown responsibilities –Unknown dates of delivery and production of some pieces –Most of the points based on estimations –Don’t forget about complexity of system, brick is not only the part !

9/12/2003Ivan Hruska16 HV comments TRACO news –8 TRACOs dead during 2 years –TRACO company agrees that problem is on theirs side –They started to produce so called “2003 series” which is based on our experience and fulfills specs –No will to replace TRACOs used in HV supply for free –But statistics ( 8 pieces from 280 wrong during 2 years) enables to use HV supplies as they are with standard spare procedure and then repair damaged card by new version.