• How do we know the present in-line patch panel size (25 x 25 x 2.5 cm**3) will fit in the available space?

ECAL Barrel In-line optical patch panel sketch and considerationsJ. Grahl and W. Funk 23 March 2004

Questions this report addresses:

• What is the vertical and horizontal path of the fiber from the bottom of the patch panel box to the SM feedthrough?

• Will that path violate the 3cm (ideally 4cm) bending radius restriction?

Horizontal plate

Inside SM

4 cm

14 cm

25 cm

MEM box

Feedthrough

r =4 cm

L = 10 cm

In-line patch panel box

Location of the EB In-line patch panel box and fiber route from there into the SM (not to scale). Measurements taken from design files:

2.5 cm

To be determined: what protects and holds fiber in place in this region?

crystals

electronics

fiber, patch panels, etc.

Tracker

HCAL

Some photos of the TK/EB mock-up in Building 186:

Measurement of vertical space between inline patch panel box and MEM box (horizontal plate)…~5cm

MEM box (note in the correct EB configuration this would be below the horizontal plate)

Inside SM

Feedthrough

In-line patch panel box

• The present in-line patch panel size (25 x 25 x 2.5 cm**3) will fit in the available space.

Conclusions:

• The fiber travels out the bottom of the box, in a 4cm-radius curve, then 10 cm horizontally to enter the SM feedthrough. It is not yet known what will protect and hold the fiber in place in this region.