1. Bagby, Foglesong General Silicon Meeting 7.10.03 Run IIb LVPS Status  Design Goals  Key Issues  System Diagrams  Prototype – 1%  Plans

2. Bagby, Foglesong General Silicon Meeting 7.10.03 Design Goals  The charge- u Provide power to SVX chips, AC, and IB. u Minimize cable plant! u Make the fuse panels more robust!! u Reduce PS replacement time!!! u Get the PSs out of the cathedral!!!!

3. Bagby, Foglesong General Silicon Meeting 7.10.03 Solutions  Provide power to SVX chips, AC, and IB. s Wiener modular supplies fit in one nice box.  Minimize cable plant! s Use 80 conductor cable to get power up to ACs. s Break out blocks used in cathedral.  Make the fuse panels more robust!! s Using ATO blade fuses.  Reduce PS replacement time!!! s Wiener design implements “supply–in-a-drawer” construction. s Entire supply system slides out by simply opening front panel of chassis. NO power cables to disconnect!  Get the PSs out of the cathedral!!!! s Wiener’s are specifically designed to provide power over long distances. s PS chassis will be located in MCH1.

4. Bagby, Foglesong General Silicon Meeting 7.10.03 Key Issue  80 Conductor Cable Voltage Drops u AVDD1 …….SVX 2.5 V……VDD u AVDD2……..AC 3.3 V ……AC 3.3 u DVDD ……….AC 5 V ……….AC 5

5. Bagby, Foglesong General Silicon Meeting 7.10.03 VDD drops

6. Bagby, Foglesong General Silicon Meeting 7.10.03 AC5 and AC3.3 drops

7. Bagby, Foglesong General Silicon Meeting 7.10.03 System Diagram

8. Bagby, Foglesong General Silicon Meeting 7.10.03 Small Current Supplies U2: IB 15V 11.5A U1: VDD 2.5V 30A U3: AC3.3V 3.3V 30A U5: AC5V 5V 30A 4 AWG 10 AWG 22 AWG

9. Bagby, Foglesong General Silicon Meeting 7.10.03 Large Current Supplies U0: VDD 2.5V 115A U4: VDD 2.5V 115A U7: VDD 2.5V 80A 1/0-6ft 22 AWG 10 AWG 1/0-144 ft

10. Bagby, Foglesong General Silicon Meeting 7.10.03 1% Test Stand

11. Bagby, Foglesong General Silicon Meeting 7.10.03 70 Amp Fuse Panel

12. Bagby, Foglesong General Silicon Meeting 7.10.03 Distribution Panel

13. Bagby, Foglesong General Silicon Meeting 7.10.03 Main Fuse Panel

14. Bagby, Foglesong General Silicon Meeting 7.10.03 Main Fuse Panel 15V-----5V----- AC 3.3V AC 5V ----2.5V-----

15. Bagby, Foglesong General Silicon Meeting 7.10.03 Plans  Constructing prototype at 1% test stand. u Finish cabling. u Measure voltage drops. u Finish documentation. u Safety review. (24/7 operation). u Production Readiness Review.  Engineering left to do…. u Safety interlock circuit. s RMI (1%) s COW (experiment)

16. Bagby, Foglesong General Silicon Meeting 7.10.03 Safety System

17. Bagby, Foglesong General Silicon Meeting 7.10.03 VIPA AC Distribution

18. Bagby, Foglesong General Silicon Meeting 7.10.03 LV AC Distribution