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Tagger Microscope Mechanical Design (view source)
Revision as of 01:36, 27 August 2008
, 01:36, 27 August 2008no edit summary
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== Managing 500 Fibers ==
In an effort to manage this large two-dimensional array of 5x100 fiber pairs (scintillator and its waveguide), it has been segmented into 20 fiber modules, 5x5 each. This is a convenient unit both mechanically and in terms of readout: on the electronics end the DAC supplying bias voltages to individual SiPMs have 32 channels and consequently, the SiPM bias and amplifier board has been instrumented with 32 SiPMs. Each fiber module with its 25 fibers is nicely paired with one board (leaving 7 spare channels). This arrangement also makes channel addressing very convenient.
The bundle of 25 fibers is glued together and then glued onto an aluminum strip with alignment bolts on both sides. The strips allow precise mounting and fastening onto a set of rails (described below). The current assembly plan requires each the modules to be inserted sequentially from one side along these rails in the positioned forced by the rail configuration. In most cases (when aligning to small crossing angles) the modules will be parallel to one another and may be aligned against each other.
== 3-point Fiber Array Adjustment ==
== 3-point Fiber Array Adjustment ==