Optical Assembly

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Up one level to Beam Test Hardware

Photos of the Finished Assembly

The optical readout ends of the BCAL without PMTs.
Objects that are placed at the BCAL end of the assembly are tiled across phototubes
An image of illuminated fibers as viewed from the PMT holder.


Tests for Cross Talk Between Light Guides

The two light guide assemblies were set on a table facing each other. Small segments of BCAL module will inserted between light guides. An air gap of approx 5-10 mm was between each light guide and the BCAL module. A LED flashlight was put in one of the PMT holders on one assembly and photographs were taken of the PMT holders on the other end of the assembly. The only observable cross talk was from misalignment of the assemblies by one row of fibers on in the horizontal and vertical directions.

The leak test setup.
Small sections of BCAL connect two light guide assemblies.
The view of the illuminated tube with the room lights on.
The view of the illuminated tube with the room lights off.