Subject:
Energy deposition, TT40
From:
"Matteo Magistris" <Matteo.Magistris@cern.ch>
Date:
Thu, 29 Jul 2004 15:13:18 +0100
To:
"Eva Barbara Holzer" <Barbara.Holzer@cern.ch>
CC:
"Vasilis Vlachoudis" <Vasilis.Vlachoudis@cern.ch>

Dear Barbara,

	I send you a picture with the energy deposition expected around
the collimator for the test of TT40.
With FLUKA I found energy deposition in air, GeV per cm3. I did the
normalization for 1 litre volume and 35 eV work function. In the plot
(it is a top view of the collimator) you already find the number of
charged pairs per litre per bunch (1 bunch=1.1E11). Scales are in cm.
The energy distribution around the collimator has almost cylindrical
symmetry, except for the region close to the steel support.You can
easily scale these values with the number of bunches per 20 ms, which is
your "critical time" if I understood correctly.

Please take into account that these simulations were meant to find
values with the right order of magnitude, not to give numbers with only
a few % uncertainty. Last remark: the energy deposition was scored
between x= - 50 cm and x = 50 cm. The white stripe at the top and at the
bottom of the picture (-60<x<-50 and 50<x<60 cm) is only a lack of data.

I am at your complete disposal for any question.
Cheers,
	Matteo

-----Original Message-----
From: Eva Barbara Holzer 
Sent: Tuesday, July 27, 2004 5:24 PM
To: Alfredo Ferrari; Vasilis Vlachoudis; Ralph Wolfgang Assmann; Matteo
Magistris; Igor Baichev; Guillaume Robert-Demolaize
Subject: collimator test: meeting to define BLM positions


Hello,

I would like to invite you to a meeting tomorrow 28.7.2004 at 865-1-B03.

For the positioning of the BLMs in the collimator tests in SPS and 
TT40 - and for the positioning in the LHC as well - we will need input 
from simulation studies. The purpose of the meeting would be to 
discuss the possible/desired locations and how to proceed to get 
simulation data on particle fluence/ energy deposition at these volumes.

I realize that this is very short notice. Please, let me know if you 
can make it nevertheless.

cheers,
Barbara