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CLF and Celeste tank. Fiber runs between laser in CLF on left and Tank on right.

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15 excellent reasons to run the fiber underground

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Fiber at CLF end before pulling through the conduit

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And after. Not a lot left over!

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drilling The Hole.

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it was a dry hole

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mate break

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fibers going in to tank. Fiber pipe comes up from ground inside battery cover.

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fibers in the tank above liner

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fibers connected to modified fill cap

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sealing hole with silicon

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Installation complete. Fibers are hidden from goats.

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Fiber connection at Laser end. A few percent of the light is split from the main beam towards the fiber mounting fixture. Teflon and an aperture mask inside the fixture attenuate the light by a large factor.

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Full Layout of CLF optics as of Sept 19 2003. The mirror that directs the beam to the sky can be seen at the bottom of the photo next to the laser.

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PMT signal from Laser. - Plenty of photons.

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Final adjustment. Full laser energy w/ fiber attenuation at CLF end. Dynode 2.5V (2V saturated). Anode ~70 ADC counts, ~45 VEM,~10xT2 threshold.