Current status of PHOBOS{at}RHIC
- Argonne National Lab., IL (United States). Physics Div.
Four experiments are currently approved for the first measurements with colliding heavy ion beams from the Relativistic Heavy Ion Collider (RHIC) which is scheduled to come into operation in Spring 1999. These experiments are named STAR, Phoenix, PHOBOS and Brahms. It is expected that central collisions of 100 GeV/u Au + Au at RHIC will lead to energy densities far above any so far attained in the laboratory and it is suspected and hoped that this situation will lead to qualitatively new physics perhaps associated with the creation of a large volume containing a plasma of deconfined quarks and gluons. All four experiments attempt to search for signatures of new physics through combinations of measurements of quantities such as the multiplicity of produced particles, the average transverse momentum of these particles, fluctuations in their multiplicity distribution, their flavor composition, the size scales of the volume from which they are emitted, mass shifts and changes in the decay widths of resonances which decay inside the high energy density volume etc. The PHOBOS detector addresses these issues with a Multiplicity Array which covers the pseudo-rapidity region {minus}5.3 {le} {eta} {le} 5.3 with a coverage of 85% of 4{pi} and also incorporates a Vertex Detector. The Multiplicity Array is complemented by two Multi-Particle Spectrometers, each of which cover the range 0.5 {le} {eta} {le} 1.5 and azimuthal angle range {Delta}{phi} = 11{degree}. Various trigger and monitor detectors complete PHOBOS.
- Research Organization:
- Argonne National Lab., IL (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 231597
- Report Number(s):
- ANL/PHY/CP--89905; CONF-960276--7; ON: DE96009458
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
BROOKHAVEN RHIC
DESIGN
EXPERIMENT PLANNING
HEAVY ION REACTIONS
KAONS
LAMBDA PARTICLES
PARTICLE IDENTIFICATION
PIONS
PROTONS
QUARK MATTER
RADIATION DETECTORS
READOUT SYSTEMS
SCHEDULES
SI SEMICONDUCTOR DETECTORS
SPECTROMETERS
TRIGGER CIRCUITS