High Energy Nuclear Physics Group
at University of Tsukuba
Switch to Japanese
PHENIX evidence of RHIC collisions recorded Thursday morning,
June 15 after accelerator operators brought beams into collision
in the PHENIX interaction region. Signals were recorded simultaneously
in seven PHENIX detector subsystems: Zero-Degree Calorimeters
(ZDC), Beam-Beam Counters (BBC), Time-of -Flight Detectors, Pad-Chambers,
Drift Chambers, Time Expansion Chambers, and Electromagnetic
Calorimeters (EMCal). The event display (upper right) shows reconstructed
tracks pointing to the collision. The BBC (upper left) confirms
that the collision occurred near the center of the PHENIX detector
system. The EMCal displays (lower left) show the first measurements
of transverse energy from RHIC collisions.
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