RHIC PERFORMANCE. Page: 3 of 6
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Parameters and performance goals for RHIC RUN2000
Number of bunches
Beta-functions A IRs
1 = 10.25 (P = 9.5 GeV/c/nucleon)
r = 70 (P = 65.1 GeV/c/nucleon)
0.5 x 109 Au ions/bunch
56 filled bunches (4 empty bunches for abort gap)
157r pm (normalized, 95%)
0.3 eVs / nucleon / bunch
#* = 3 m @ 2,4, 8,and 12 o'clock
*=8 m 6, and 10 o'clock
2 x 1025 cm2 s-1 (10 % of design luminosity)
a few inverse micro-barns
energy during acceleration. At transition energy the spreads of the particle revolution
frequency stemming from the spread in velocity and spread in path length cancel exactly
and all particles maintain their relative position for a long time. Interaction between
particles can then cause instabilities. Although some beam loss and longitudinal emittance
growth was observed in RHIC from crossing transition energy the effect was not excessive
due to the still lower beam intensity and the special machine lattice used during this first
run that minimized momentum dependent (chromatic) effects at transition. To reach
full design intensity of 1 x 109 Au ions/bunch pulsed quadrupole power supplies will be
Time (Sep 3 2000)
02:50 02:51 02:52
Figure 2. Beam intensity evolution during filling and acceleration in RHIC. The dark and
light 'staircase' lines are the beam intensity in the blue and yellow ring, respectively. The
third line shows the main dipole current and is proportional to the beam momentum.
.. .. ..-. . -.. . . . . . -.. . . . . .. . . . . . . -.. .. . ---- . . . .. . . .. . . -..-..- ..-..-
-- - --- -- -- --- -- - - -. -- -- .- -- - -- - -- --- --- --- -..- --- -. -
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Roser, T. RHIC PERFORMANCE., article, January 14, 2001; Upton, New York. (https://digital.library.unt.edu/ark:/67531/metadc717060/m1/3/: accessed April 22, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.