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Late in January, the CDF and DZero detectors rolled into their respective Tevatron collision halls in preparation for the start of Run II. (The roll-ins, at an average of inches per hour, were considerably slower than the speed implied by the time exposure of CDF in motion, above.)
Now that the detectors have reached their destinations, the DZero collaboration is using particle collisions furnished by Mother Nature in the form of cosmic rays to commission their detector (at left).
Across the ring, CDF is completing detector installation and trigger software to be ready for the collisions that will soon be coming their way courtesy of the Fermilab Beams Division.
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