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Bunch Spacing
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Charges per bunch
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Bunches per batch
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|
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Pilot
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25 ns
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5 x 10^9
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1
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Intermediate
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25 ns
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3.4 x 10^10
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72
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Intermediate
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75 ns
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8.3 x 10^10
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24
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Commissioning
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25 ns
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1.8 to 2.75 x 10^10
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216/288
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Nominal
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25 ns
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1.1 x 10^11
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216/288
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Ultimate
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25 ns
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1.8 x 10^11
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216/288
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Nominal Lead
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125 ns
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5.6 x 10^9
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608 per beam
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Machine Studies
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Totem
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1.1 x 10^11
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36
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Pilot beam parameters (JJG - LCC)
Commissioning proton beam parameters (FR at LCC)
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
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Commissioning
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Nominal Injection |
Nominal high energy
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|
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e = 7.8 nm b = 180 m -> s = 1.2 mm g = 479.7 |
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Momentum spread
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Momentum deviation
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Dp/p< 10^-4
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||
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Beta beating
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21%
|
25%
|
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Orbit RMS
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< 4mm
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< 3mm
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|
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Orbit peak
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< 0.4 s in arcs
< 0.2 s in IPs < 0.15 s (30 mm) in cleaning insertions |
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Chromaticy
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< 10
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+/- 1 unit
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+/- 1 unit
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Mechanical aperture
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orbit + beat + alignment (2.5 mm) 8.5s in arc |
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Tune
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DQ < +/- 0.015
|
DQ < +/- 0.005
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Nq at 450 GeV 7 x 10^8 p/m/s (protons/metre/second) which is 2.2 10^-6 % of the nominal beam.