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What value of Beta* are they using?
Posted: Thu Jul 28, 2011 10:44 pm
by jmc2000
I'd expect Beta* to be between 1.0 and 1.5m, but a value of 10m is shown on this page
http://op-webtools.web.cern.ch/op-webto ... =LHCCONFIG
Can someone explain the difference?
Re: What value of Beta* are they using?
Posted: Thu Jul 28, 2011 11:13 pm
by jmc2000
Aha! it drops down to 1.5m when squeezing the beam.
But how on earth are they getting luminosities of 1.9/nb/s while keeping beta* and bunch intensity as they were two weeks ago? Emittance decrease was supposed to give 1.5/nb/s max!!
Re: What value of Beta* are they using?
Posted: Fri Sep 02, 2011 9:52 pm
by jmc2000
For the final run they're using a value of beta* = 1.0m which should increase the luminosity by a factor of 1.5 and more new records, hopefully
