Transcript Prototype Mechanical / optical considerations

Prototype Mechanical / optical considerations
1. Current LED system performance
2. New APD / Fiber /Strong Back integration scheme
LED Calibration and Monitoring System
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Optical router for 12 LED
pulses for the 12
Modules in a strip module
Module gain monitoring signal compared to cosmic ray peak
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Recent Improvements:
Last measurement of LED signal from the tower with 0.5 mm
fibers corresponds to ~4 GeV electrons
For the test beam prototype, increase diameter of secondary
fibers up to 0.75 mm and use a
jacketed fibers to increase optical isolation.
Estimated improvement ~2 times.
New LED board up a signal ~2 times. (Hans Schedule ??)
Goal is to have LED system capable of ~ 16 GeV pulses
New APD/Fiber/Strong Back integration scheme.
Old APD/Fiber/Strong Back integration scheme.
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Leaf spring
Three proposed variants of new APD/Fiber integration scheme.
Deeper cavity variant adopted
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New integration Scheme
Adopted for test beam
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New integration Scheme
Adopted for test beam
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