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Moving the Tagger Microscope (view source)
Revision as of 21:01, 23 March 2021
, 21:01, 23 March 2021→Popsicle Stick
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==Popsicle Stick==
==Bundle Support (aka Popsicle Stick)==
The Tagger Microscope (TAGM) contains 17 optical fiber bundle, each consists of a 5x6 array of 30 fibers for a total of 510 fibers (5 rows, 102 columns). Figure ??? below shows the fiber array as viewed by the electrons passing through the tagger magnet focal plane. Each optical fiber consists of a 2 mm<sup>2</sup> x 2 cm BCF-20 scintillating fiber (SciFi) thermally fused to 2 mm<sup>2</sup> x 165 cm BCF-98 light guide, see Figure ???. The SciFi end of each fiber is thermally bent into an "S" shape to remove the fiber from the electrons' path soon after passing through the SciFi, see Figure ???. The fiber begins its bend out of the electrons' path after only 4.5 cm. This length provides enough material past the fused joint to minimize the strain on the joint resulting from the bend and the fiber mounting straps, while also reducing the material in the line-of-fire that could result in backscatter.
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