[esa-t474] beam DQ

[Bino Maiheu]

Hi Mike,

> - the Linac phases affect the longitudinal phase space, particularly the energy spread and the bunch length.  The relevant phase is PHAS DR12 63 VACT

THanks, unfortunately PHAS DR12 63 VACT doesn't appear in the data
logged to disk :(.

> - for S29 feedback, yes units are um and urad
> - fb31 EGAIN1E- is an actuator variable that talks to the S27 and S28 sub-booster phases to set the beam energy.  Not sure of units.  For monitoring of beam energy I think you want to look at fb31 engye-.

I see, E've noticed from the MCC raw data in zen's ascii files that the
units were actually present :). The value is in MeV, for EGAIN1E-,
however FB31 ENGYE- isn't present in the ascii data. Guess we'll just
have to live with that. Maybe could be nice to have it in.

Thanks !!
     bino


> mike
> 
> -----Original Message-----
> From: Bino Maiheu [mailto:bino at hep.ucl.ac.uk] 
> Sent: Wednesday, August 29, 2007 11:12 AM
> To: ESA T474 Mailing list
> Subject: [esa-t474] beam DQ
> 
> hi all. I'm adding a repository with beam DQ plots ( fb setpoints, corrector settings, toroid readings, linac phases etc... ) it's going in the usual place http://www.hep.ucl.ac.uk/lc/T474/EsaData/daql/
> under beam. I'll have to rerun the plots once i have had a closer look to the calibrated 3I2/3I2 toroid readings. once that's done, i'll link everyting off the runinfo database and put some additional info in it, like e.g. average feedback setpoint positions.
> 
> there are a number of things however i would like to understand better, so if anyone has an idea of the following, you're welcome, i'll add it to the database
> 
> - would be nice to have some docu on what the LINAC phases influence
>   down in the end station
> 
> - the sector 29 feedback, i assume the units there are um and urad ?
> 
> - the fb31 EGAIN1E-  (FB31_FB31ESA_EGAIN1E-), what would be exactly in
>   there ? ( units ? )
> 
> 
> thanks.
> bino
> 
> 
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