602
K. Hübner et al.
Table 10.10
Achieved performance parameters of RHIC
Parameter
Unit
Au–Au operation
d–Au operation
Pol. proton–proton operation
Total energy at store
GeV/nucleon
100
100
100
250
Total energy at injection
GeV/nucleon
9.8
9.9
23.8
23.8
Number of bunches
111
95
109
109
Bunch intensity
10 9
1.1
100d/1.0Au
135
110
IP beta-function
m
0.75
0.85
0.7
0.7
Normalized rms emittance
μm
2.8
2.6
2.5
3.0
Rms bunch length
m
0.3
0.3
0.85
0.6
Hourglass factor
0.93
0.95
0.70
0.80
Beam-beam parameter/IP
0.0015
0.0014
0.0045
0.0054
Peak luminosity
cm −2
s −1
40
× 10 26
27
× 10 28
50
× 10 30
85
× 10 30
Average luminosity
cm −2
s −1
20
× 10 26
14
× 10 28
28
× 10 30
55
× 10 30
Average polarization
%
–
–
55
34
Calendar time in store
%
53
58
54
53
Integrated luminosity per week
nb −1
0.65
40
8300
1840