Welcome to RHIC News
We hope that this web publication will in some small measure reflect the excitement of the RHIC and AGS program at Brookhaven, as explained by some of the people who are doing the experiments, analyzing the data, and writing the papers.
Sometimes Less can be More
by Angelika Drees
Before the most recent Heavy Ion run of our RHIC accelerator we made – of course – plans and projected our goals for the 3rd running period with Au nuclei at full energy (100 GeV) to date. The last run of this kind took place in the year 2004. In particular, our goals were to increase the number of bunches in RHIC from 45 to 111, double the average luminosity per store from 4x1026 cm-2 s-1 to 8x1026 cm-2 s-1, double the peak luminosity from 15x1026 cm-2 s-1 to 30 and, most importantly, double the amount of integrated luminosity per week from 160 mb-1 to over 300 with a machine availability of 60% or more at store. More...
Critical Point Search and the STAR Time-of-Flight Upgrade
By Paul Sorensen
The predicted map of nuclear matter contains many exotic and varied regions. The now familiar nucleus was discovered by Ernst Rutherford in March 1911. The nucleus was later found to be a bundle of protons and neutrons which in turn are bundles of three quarks bound together by gluons. The normal nucleus represents a small point on the map of nuclear matter. In other regions, we expect to find phases of matter such as a soup of unbound quarks and gluons (quark-gluon plasma), various arrangements of color super-conducting phases, and even a controversial phase of matter that could involve quarks confined into nearly massless bundles. The borders between these regions are phase transitions. The transition from one region to another can be smooth or abrupt. More...
Low Energy Operations
by Todd Satogata
Part of the challenge of RHIC operations is not only to increase luminosity at high energies, but to explore low energy collisions to search for a possible QCD critical point in the nuclear matter phase diagram. The search for this QCD critical point has focused on gold-gold collisions in the energy range sqrt(sNN)=5-50 GeV. The low end of this range is far below the c.m. energy of RHIC injection collisions of sqrt(s_NN)=19.6 GeV, and RHIC operation at these low energies encounter several new challenges. More...