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Install the BGI monitors in the MAD description

From:    Mariusz Gracjan Sapinski
Sent:    08 November 2010 14:07
To:    John Jowett
Subject:    BGI dcums

Follow Up Flag:    Follow up
Flag Status:    Flagged

Hi John,

     I have extracted the dcum values (in meters, calculated from IP1
clockwise) for BGIs (simply from Layout DB). Here are the values:

                       start[m]         end[m]        middle[m]
BGI.B1H     9932.2652    9933.8652     9933.0652
BGI.B1V     9934.0652     9935.6652    9934.8652
BGI.B2H    10060.2972  10061.8972   10061.0972
BGI.B2V    10058.4972   10060.0972   10059.2972

     It would be great if I could get beta values for the middle positions.
     The fixed display is hanging sometimes and then one should restart it.
But this of course does not affect logging. The beam sigma is stored in the
variables like:
     LHC.BGIH.5L4.B1:BEAM_SIGMA [mm]

     The fitting algorithm is not yet optimized. You can perform your own fits
using raw data stored in variable:
LHC.BGIH.5L4.B1:BEAM_PROFILE_DATA. [pixels]
     The calibration we are using now is 0.0816 mm/pixel. It is a bit
optimistic, real value might be up to about 20% higher. I'm trying to get this
value more precise, but at the same time I don't want too change it too often,
so for the moment I stick to 0.0816 mm/pixel.

         Cheers,

                 Mariusz