chiho wang atlas trt duke university cern, feb. 2002 1 fuse box status chiho wang duke university

Chiho Wang ATLAS TRTDuke University CERN, Feb. 2002

Title: (AIATL_LOGO2.eps)Creator: Adobe Illustrator(r) 6.0CreationDate: (4/3/97) (11:26 AM)

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Fuse Box Status

Chiho Wang

Duke University



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Fuses

Version N2

5.8 2.0

4.0 3.8

Ø 0.3 0.9

Contacts position ( subversion )

4.0 3.8

0.1 (0.2) 0.9

- all dimensions have the tolerance ± 0.1 mm

Prototype fuses received 06/22/2001

Spec. L: 5.8 mm W: 2.0 mm H: 4.2 mm

(including legs) 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:

Length: OK Width: OK Height: A little hard to

squeeze in. Can it be smaller? Or, can we get another 1mm for fuse box?



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New Fuse Box Prototype

Dimension changes from previous prototype:

Height (z): 4x2mm --> 5.5x2mm (+3 mm) Length (): 19mm --> 20.15 mm (+1.15 mm) Width (r): type dependent, no change



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Fuse box dimension



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Remaining Design Issues

Fuse box mounting Free hanging from the end of HV

kapton Risk in damaging kapton.

A rigid mounting Require interaction with space

frame or cooling plate & snake cable...

Fuse box grounding From fuse box to tension plate

Require interaction with snake cable & cooling plate ...

Solder soft wire between HV kapton ground shield and tension plate.

May affect kapton flexibility



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Fuse Box Components

Duke FR-4 casing* FR-4 printed circuit film*

1812 size 1nF filter capacitors (same as module capacitor)

1206 size 1-2k filter resistors Truncated Molex 2759 female terminal Stycast potting glue for coating Furon K102, 0.001” Kapton + 0.0015” Acrylic

adhesive tape 2-56 Nylon screw

Penn/CERN/Russia(?) Habia HFI 150 minicoax HV cable (?) Connector for minicoax to PPB1 Fuses*

* custom made components



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Production Scheme

Once design is finalized ~ 2 month for part collection &

fabrication. Including: Machining of FR-4 casing Fabrication of printed circuit

~ 4 month for assembly Based on 200 fuse boxes with

2.5 boxes/person/day Could we send this out?

(Krakow?)



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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

chiho wang atlas trt duke university cern, feb. 2002 1 fuse box status chiho wang duke university

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