Changes

== Coupling Waveguide to Photo-sensor ==

== Coupling Waveguide to Photo-sensor ==

[[Image:Chimney-AmpBoard.png|left|315px]]

[[Image:Chimney-AmpBoard.png|left|210px]]

In the current design, each fiber module (containing an array a square bundle of 25 fibers) is paired with a detector PCB (referred to here as "analog" or "amplifier" card to distinguish from digital control electronics separately under design.) These circuit boards attach to female card-edge connectors on the ceiling of the tagger enclosure. The 32 photo-sensors (SiPMs) form a row along the bottom edge of the card with amplifier and summing circuitry occupying the rest of it. This arrangement allows easy access for the fibers without interfering with the neighboring cards. A 32 "chimney" array block allows for prices alignment of the fiber waveguides to their SiPMs. This is essentially a plastic block with square channels which hold the fibers. This block is with respect to the amplifier board via holes in the card itself and in the tagger enclosure frame.

In the current design, each fiber module (containing an array a square bundle of 25 fibers) is paired with a detector PCB (referred to here as "analog" or "amplifier" card to distinguish from digital control electronics separately under design.) These circuit boards attach to female card-edge connectors on the ceiling of the tagger enclosure. The 32 photo-sensors (SiPMs) form a row along the bottom edge of the card with amplifier and summing circuitry occupying the rest of it. This arrangement allows easy access for the fibers without interfering with the neighboring cards. A 32 "chimney" array block allows for prices alignment of the fiber waveguides to their SiPMs. This is essentially a plastic block with square channels which hold the fibers. This block is with respect to the amplifier board via holes in the card itself and in the tagger enclosure frame.