PHENIX ACHIEVMENTS AND CC-J W. A. Zajc Columbia University for the PHENIX Collaboration
The PHENIX Collaboration A strongly international venture: è 11 nations Brazil, China, France, Germany, India, Israel, Japan, South Korea, Russia, Sweden, United States è 51 institutions 2
Run-1 Configuration l Two central arms o Mechanically ~complete o Roughly half of aperture instrumented l Global detectors o Zero-degree Calorimeters (ZDCs) o Beam-Beam Counters (BBCs) o Multiplicity and Vertex Detector (MVD, engineering run) 3
Run-1 Accomplishments l l l First collisions: 15 -Jun-00 Last collisions: 04 -Sep-00 During this period: o Commissioned u. Zero-Degree Calorimeters u. Beam-Beam Counters u. Multiplicity and Vertex Counter u. Drift Chambers u. Pad Chambers u. Ring Imaging Cerenkov Counter u. Time Expansion Chamber u. Time-of-Flight Counters u. Electromagnetic Calorimeter u. Muon Identifier u. Minimum Bias Triggers u. Data Acquisition System 4 o Recorded ~5 M minimum bias events
Run-1 Results l Global Event Features o Transverse Energy o Charged Multiplicity o Elliptic Flow l Identified Particles o Hadrons u p , K , p u po’s u p p HBT All results are for Au-Au collisions at o Electrons l Studied versus o Centrality o Number of participants 5
Run-1 Results This is a partial compilation 6
Physics Impact 7
CC-J Contributions CC-J made an essential contribution to PHENIX’s impressive Quark Matter success: Ô~50% of all PHENIX Quark Matter data reconstructed at CC-J ÔCC-J “routinely” provides 100 K fully simulated events per week ÔThese simulations were integral part of our analysis effort for Quark Matter ÔNo CC-J è systematic studies No è Reduced confidence in our results 8
Other Contributions l Regional analysis center of m. DST’s o. Model for other efforts (e. g. , French) o. Archive l Tracking of technology advances o. Data storage o. High-speed, long-distance networking l Data export facility at RCF 9
Personnel l Manager: T. Ichihara Technical Manager: Y. Watanabe Computing Scientists: o N. Hayashi o S. Sawada o S. Yokkaichi l Scientific Coordination o H. En’yo o H. Hamagaki l BNL work o Y. Goto o A. Taketani 10
Gratifying Success Slide presented by WAZ at RCF review of PHENIX Computing on 03 -Dec-98 09 -Feb-01 11
This Year l In Run-2, PHENIX will record a data-set equivalent to its entire Run 1 data-set EACH DAY è We will need 100 -1000 times the CPU cycles required for Run-1 l Expect è Major heavy ion physics impact è Major spin physics impact è Major role for CC-J 12
Summary l l l PHENIX has achieved its goals for Run 1 at RHIC. CC-J has played a very large role in the PHENIX’s Run-1 success. PHENIX wishes to thank all whose vision and dedication have made CC-J a reality. Special thanks to M. Ishihara 13
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