Where can I see the injection emittance?

[jmc2000]

Where can I see the injection emittance for a fill?

[LarryS]

Some “emittance” information is displayed on the “Wire Scan Application” snapshot that is frequently posted in the “Operations Log”. Access to the “Operations Log” requires a CERN Log On Id.

[adam_jeff]

You can also work out the emittance from the beam size, if you know the beta (Twiss beta) at the point where the beam size is measured. Beam size = sqrt(beta * emmittance).
On the LHC dashboard, I think that the blue lines on the 'beam size' graph correspond to the BSRT synchrotron-light camera. In this case the beta (measured in metres) would be:

450 GeV BETX BETY
B1 162.5 174.0
B2 130.1 417.6

3500 GeV BETX BETY
B1 173.0 194.8
B2 130.0 371.7

I have no idea what the red lines show, does anyone know?

[Kasuha]

I have no idea what the red lines show, does anyone know?

Blue solid = B1 horizontal
Blue dotted = B1 vertical
Red solid = B2 horizontal
Red dotted = B2 vertical

[adam_jeff]

Oh yes, kind of obvious. D'oh!