One of the small RHIC
experiments, size (6 x 6 x 3 m), and people (50 scientist)
Designed to be able to examine
and analyze a very large amount of minimum bias interactions (high trigger rate
capability)
Measurements
¨Multiplicity and
angular distribution of charged particles
h < 5.3 over 4 p coverage event by
event
¨Particle
spectra
0.5 < h < 1.5 and 2 x 11o in f (azimuthal)
Covers about 1% of particles
Capable to reconstruct low
momentum particles ( 55 MeV/c p)
pseudorapidity h
= - ln (tan(q/2))
rapidity y = 1/2 * ln [( E + p)L/ (E - pL)]