27 August 2007 MD plan from Ulrich Dorda

As you might have heard, the BBLR interlock dripped during this weekend. 
We (a radiation protection representative, a BBLR hardware expert, Frank and me) 
will meet at 19:00 at BA5 to quickly access the tunnel and reset the BBLR.

We hope that this can be done within 15 minutes.

Therefore I ask you to be at the CCC before 7 o clock, in order for us to have a contact person there and 
to immediately start the setup as soon as we are out again.

The main issues of the setup are:
- moving to "quasi-LHC tunes", somewhat separated tunes to avoid coupling (0.28, 0.32)
- check orbit
- correct coupling
- measure/set chromaticiy
and any other stuff.
Please read out/save transverse and longitudinal profiles.
The first measurements will be a currentscan at two distances (9 and 4.5
sigma)

Please make sure everything (tune, loss, bct...) is recorded and a MD protokoll is started, 
containig the foldernames.


In my proposal, the first thing to do is " scan at 2 distances (tune correct), 
take data for both polarities", which I think is just what you want. 
In order to make the most out of it and have it in the MD plan, 
could you please tell me the distance (in sigma_SPS or mm) which you would like to have measured?

The md-plan would then be:
Setup
I scan at 2 distances (tune correct), take data for both polarities 
<-includes Jean Pierre's Q'-scan Distance scan Different separation scan Tune scan


Post-MD remarks by Jean-Pierre:

I realized this morning that the 55 GeV aperture is notably larger than at 26 GeV. 
In order to compare the diffusion at various energies, we should probably 
keep the machine aperture about constant in sigma's e.g. by moving in the dump block. 
Indeed the observable is the current loss, insensitive to the development of tails 
that would recover stability at amplitudes below the aperture limit. 
According to simulations, this should not happen for a pure wire field. 
But the SPS is not perfectly linear...