1. Chiho Wang ATLAS TRT Duke University CERN, Feb. 2002 1 Fuse Box Status Chiho Wang Duke University

2. Chiho Wang ATLAS TRT Duke University CERN, Feb. 2002 2 Fuses  Prototype fuses received 06/22/2001 u Spec. L: 5.8 mm W: 2.0 mm H: 4.2 mm (including legs) u 5 random samples L: 5.82 +/- 0.03 mm W: 2.4 +/- 0.17 mm H: 4.33 +/- 0.09 mm  With new fuse box prototype: u Length: OK u Width: OK u Height: A little hard to squeeze in. Can it be smaller? Or, can we get another 1mm for fuse box?

3. Chiho Wang ATLAS TRT Duke University CERN, Feb. 2002 3 New Fuse Box Prototype  Dimension changes from previous prototype: u Height (z): 4x2mm --> 5.5x2mm (+3 mm) u Length (  ): 19mm --> 20.15 mm (+1.15 mm) u Width (r): type dependent, no change

4. Chiho Wang ATLAS TRT Duke University CERN, Feb. 2002 4 Fuse box dimension

5. Chiho Wang ATLAS TRT Duke University CERN, Feb. 2002 5 Remaining Design Issues  Fuse box mounting u Free hanging from the end of HV kapton Risk in damaging kapton. u A rigid mounting Require interaction with space frame or cooling plate & snake cable...  Fuse box grounding u From fuse box to tension plate Require interaction with snake cable & cooling plate... u Solder soft wire between HV kapton ground shield and tension plate. May affect kapton flexibility

6. Chiho Wang ATLAS TRT Duke University CERN, Feb. 2002 6 Fuse Box Components  Duke u FR-4 casing* u FR-4 printed circuit film* 1812 size 1nF filter capacitors (same as module capacitor) 1206 size 1-2k filter resistors u Truncated Molex 2759 female terminal u Stycast potting glue for coating u Furon K102, 0.001” Kapton + 0.0015” Acrylic adhesive tape u 2-56 Nylon screw  Penn/CERN/Russia(?) u Habia HFI 150 minicoax HV cable (?) u Connector for minicoax to PPB1 u Fuses* * custom made components

7. Chiho Wang ATLAS TRT Duke University CERN, Feb. 2002 7 Production Scheme  Once design is finalized u ~ 2 month for part collection & fabrication. Including: Machining of FR-4 casing Fabrication of printed circuit u ~ 4 month for assembly Based on 200 fuse boxes with 2.5 boxes/person/day Could we send this out? (Krakow?)

8. Chiho Wang ATLAS TRT Duke University CERN, Feb. 2002 8 Summary  A prototype fuse box has been assembled with the prototype fuses. No obvious dimensional problem.  Fuse box mounting and grounding schemes are yet to be addressed  When design is finalized. Production is estimated to take ~ 6 month