Parameter |
BCMS |
BCMS pushed
a bit
|
Nominal - pushed |
Comments |
Energy [TeV] |
7.0 |
7.0 |
7.0 |
|
β* (1/2/5/8) [m] |
0.3 / 10 / 0.3 / 3 |
0.3/ 10 / 0.3 / 3 |
0.3/ 10 / 0.3 / 3 |
Plus beta* levelling to 25 cm |
Long-range separation [sigma] - assumed emittance |
9.2 sigma - 2.5 um |
9.2 sigma - 2.5 um |
9.2 sigma - 2.5 um |
|
Initial Half X-angle (1/2/5/8) [μrad] |
-160 / 120 / 160 / -150 |
-160 / 120 / 160 / -150 |
-205 / 120 / 205 / -150 |
Anti-levelled to 130 urad |
Number of colliding bunches (1/5) |
2592 |
2592 |
2748 |
BCMS - 240 bunches/injection from SPS |
Bunch population |
1.3e11 |
1.4e11 |
1.7e11* |
* ruled out, initialy at least, by e-cloud heat load |
Emittance into Stable Beams [μm] |
2.5 |
2.6 |
3.0 |
|
Bunch length [ns] - 4 sigma |
1.1 |
1.1 |
1.1 |
|
Virtual Luminosity (L0) |
2.3e34 |
2.6e34 |
3.2e34 |
|
Levelling time (hours) |
2.0 |
3.8 |
7.9 |
|
Luminosity per 12 hour fill (burn only) |
0.65 |
0.7 |
0.8 |
|
Luminosity lifetime (tauL) - end levelling |
13 hours |
14 hours |
15 hours |
Approx. - assuming burn only |
Integrated/140 day year (fb-1) |
65 - 70 |
70 - 75 |
85 - 90 |
NB Ballpark! |