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mLine 51:
Line 51: − + − − 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. − − The illustration shows this array with one sample fiber inserted. The array of blocks set on the opposite side of the square channels are the SiPMs. − +
Tagger Microscope Mechanical Design (view source)
Revision as of 17:01, 8 September 2008
, 17:01, 8 September 2008→Coupling Waveguide to Photo-sensor
== Coupling Waveguide to Photo-sensor ==
== Coupling Waveguide to Photo-sensor ==
[[Image:Chimney-AmpBoard.png|left|210px]]
[[Image:Chimney.png|left|210px]]
In the current design, each fiber module (containing 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 via EuroCard connectors to the ceiling of the tagger enclosure made up of special backplane boards. 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: the block is equipped with a card guide for the insertion of the amplifier board (already attached to backplane) The mounting holes for tightening down the backplane and those for mounting the chimney structure are arranged such that that the end of the amplifier board with the SiPMs arrives in alignment with the clear fiber waveguides held by the array of grooves in the chimney.
== CAD Drawings ==
== CAD Drawings ==