PHENIX ACHIEVMENTS AND

CC-J

W.A. ZajcColumbia University

for the PHENIX Collaboration

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The PHENIX CollaborationThe PHENIX

Collaboration

A strongly international venture:11 nations

Brazil, China, France, Germany, India, Israel, Japan, South Korea, Russia, Sweden, United States

51 institutions

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Run-1 Configuration

Run-1 Configuration

Two central arms Mechanically

~complete Roughly half of

aperture instrumented Global detectors

Zero-degree Calorimeters (ZDCs)

Beam-Beam Counters (BBCs)

Multiplicity and Vertex Detector (MVD, engineering run)

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Run-1 Accomplishments

Run-1 Accomplishments

First collisions:15-Jun-00 Last collisions: 04-Sep-00 During this period:

Commissioned Zero-Degree Calorimeters Beam-Beam Counters Multiplicity and Vertex Counter Drift Chambers Pad Chambers Ring Imaging Cerenkov Counter Time Expansion Chamber Time-of-Flight Counters Electromagnetic Calorimeter Muon Identifier Minimum Bias Triggers Data Acquisition System

Recorded ~5M minimum bias events

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Run-1 ResultsRun-1 Results Global Event Features

Transverse Energy Charged Multiplicity Elliptic Flow

Identified Particles Hadrons

, K , p o’s HBT

Electrons Studied versus

Centrality Number of participants

All results are for Au-Au collisions at

GeV130sNN

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Run-1 ResultsRun-1 Results

This is a partial compilation

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Physics ImpactPhysics Impact

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CC-J Contributions

CC-J Contributions

CC-J made an essential contribution to PHENIX’s impressive Quark Matter success: ~50% of all PHENIX Quark Matter data

reconstructed at CC-J CC-J “routinely” provides 100K fully

simulated events per week These simulations were integral part of

our analysis effort for Quark Matter No CC-J

No systematic studiesReduced confidence in our results

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Other ContributionsOther Contributions

Regional analysis center Archive of DST’s Model for other efforts (e.g., French)

Tracking of technology advances Data storage High-speed, long-distance networking

Data export facility at RCF

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PersonnelPersonnel

Manager: T. Ichihara Technical Manager: Y. Watanabe Computing Scientists:

N. Hayashi S. Sawada S. Yokkaichi

Scientific Coordination H. En’yo H. Hamagaki

BNL work Y. Goto A. Taketani

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Gratifying Success

Gratifying Success

Slide presented by WAZ at RCF review of PHENIX Computing on 03-Dec-98

09-Feb-01

03-Dec-98

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This YearThis Year In Run-2, PHENIX will record a

data-set equivalent to its entire Run-1 data-set

EACH DAY

We will need 100-1000 times the CPU cycles required for Run-1

ExpectMajor heavy ion physics impactMajor spin physics impactMajor role for CC-J

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SummarySummary 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