RHIC PERFORMANCE. Page: 2 of 6
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10:00 o'clock 2:00 o'clock
8:00 o'clock STAR 4:00 o'clock
Beam Energy = 100 Ge /u
U-]ne 9 GeVu No. Bunches = 57
High Int. Proton Source A F Q=7 No. ions /Bunch = 9 x
}~ LIA 21 = 10~ hourse
BTAC OOSTER tr
Pol. Proton Source Lave = 2 x 1026 CM-2 Se _
Q = +32 TANDEMS
Figure 1. Layout of RHIC and the injector accelerators. The gold ions are stepwise ionized
as they are accelerated to RHIC injection energy.
needed to be commissioned. Very precise and reliable beam position monitors were avail-
able early on in the commissioning effort and allowed beam-based diagnostics to detect
hardware problems. They also allowed the demonstration of the excellent agreement of
the RHIC machine lattice functions with the design.
Table 2 gives the goals for the main machine parameters for the commissioning and
first operations period, all of which were either reached or exceeded during the run. The
energy at storage of 66 GeV/nucleon is less than the design energy of 100 GeV/nucleon
because the large-bore superconducting dipole magnets used to merge and separate the
two beams on either side of the interaction regions require in-situ training to reach their
design strength. For this first run this was postponed until the end of the run at which
time design performance for these magnets was achieved successfully.
RHIC is also the first superconducting, slow ramping accelerator that crosses transition
RHIC injector performance
Location Intensity normalized to a single RHIC bunch Efficiency
Tandem 3.8 x 109
Booster Injection 2.2 x 109 58%
Booster Extraction 1.8 x 109 81%
AGS Injection 0.9 x 109 50%
AGS Extraction 0.9 x 109 95%
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Roser, T. RHIC PERFORMANCE., article, January 14, 2001; Upton, New York. (https://digital.library.unt.edu/ark:/67531/metadc717060/m1/2/: accessed April 21, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.