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Bunch Spacing
Charges per bunch
Bunches per batch
Pilot
25 ns
5 x 10^9
1
Intermediate
25 ns
3.4 x 10^10
72
Intermediate
75 ns
8.3 x 10^10
24
Commissioning
25 ns
1.8 to 2.75 x 10^10
216/288
Nominal
25 ns
1.1 x 10^11
216/288
Ultimate
25 ns
1.8 x 10^11
216/288
Nominal Lead
125 ns
5.6 x 10^9
608 per beam
Machine Studies
Totem
1.1 x 10^11
36

Pilot beam parameters (JJG - LCC)

Commissioning proton beam parameters (FR at LCC)

Tolerances

Detailed breakdown provided by Oliver in Seminar on the 19th September 2001.

Nominal emittance 3.75 mm       Commissioning emittance 1.0 mm

Injection: bmax in arcs = 183 m, Dmax in arc 2.15 m, bmax in IRs = 380 m

Commissioning
Nominal Injection
Nominal high energy
 

e = 7.8 nm

b = 180 m -> s = 1.2 mm

g = 479.7

Momentum spread
 
Momentum deviation
Dp/p< 10^-4
Beta beating
 
21%
25%
Orbit RMS
< 4mm
< 3mm
Orbit peak
< 0.4 s in arcs
< 0.2 s in IPs
< 0.15 s (30 mm) in cleaning insertions

 

Chromaticy
< 10
+/- 1 unit
+/- 1 unit
Mechanical aperture
 

orbit + beat + alignment (2.5 mm)

8.5s in arc

Tune
DQ < +/- 0.015
DQ < +/- 0.005

Quench tolerances

Nq at 450 GeV 7 x 10^8 p/m/s (protons/metre/second) which is 2.2 10^-6 % of the nominal beam.